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NET ZERO BUILDINGS • Highlighting the Path Toward Net Zero Building Design

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DAYLIGHTING: SYSTEMS SYNERGY ENVELOPE: RESILIENT BUILDINGS HVAC: COLORADO SUSTAINABILITY

NET ZERO BUILDINGS July 2018

 Volume 7, Number 3

22 28 46

The promised returns on buildingmounted wind turbines have never materialized, but larger installations are becoming more popular, especially for clients seeking predictable pricing.

NET ZERO BUILDINGS Premier Issue: Jan. 2013

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DISTRIBUTED WIND

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A designer and builder of sustainable projects, the architect of a small town office, following Passive House principles, was originally targeting LEED Gold, but the welcome result was a LEED Platinum, net-zero energy project.

project zero Alfandre Architecture, 231 Main St.

06 Toward Zero

New Paltz, New York

By Jim Crockett

With the passing of a colleague—a staunch supporter of net zero—we will continue to carry the torch for greater discussion and collaboration.

08 

By Jim Crockett

When it came time to design a new office for his 5,400-sq.-ft. operation in New York’s Hudson Valley, about 90 miles from New York City, Rick Alfandre, AIA LEED AP BD+C, did his best to be “climatically responsible.”

ON THE COVER Larger wind turbine installations are becoming a popular option. Utilities in some states are becoming more open to behind-the-meter projects that feed customer operations directly, without feeding power to the grid.

OBSERVATIONS

52 End Point We say goodbye to a dear friend and colleague, one who filled the office with laughter. By John Mesenbrink

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P OW ER

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The promised returns on building-mounted wind turbines have never materialized, but larger installations are becoming more popular. By Chuck Ross

Offshore Wind Portable Solar u Solar Storage u Battery Systems u u

DAY L I G H T I N G

EN V ELO PE

LIGHTING

WAT ER

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Systems Synergy

Green Blueprint

Beyond Efficacy

Piloting Net Zero

Colorado Example

Leveraging expertise of the full building team is key to optimizing integrated daylight designs. The challenge becomes harnessing advanced daylighting technology and the major players involved—architects, engineers, contractors, consultants, etc.—for each project.

In today’s buildings, it has become crucial for architects to incorporate resiliency principles into their designs. Speakers and exhibitors at AIA are thinking big about ways buildings can take cities to the next efficiency level, with the venue serving as the example.

Lumens per watt, the industry lighting measurement standard, is not an accurate determinant of a product’s performance in delivering the desired amount of light on a targeted surface. Other factors must be considered in selecting appropriate luminaires.

An off-campus house at Purdue University has become a testing ground for net-zero concepts as engineers, students and national research teams are using the living lab for a better understanding of energy and water efficiency, translating to better sustainability.

Committed to advancing renewable energy deployment and energy efficiency at-large, the state of Colorado has in many ways been a pioneer in the widespread adoption of energy-saving solutions. NZB takes a look at two prominent projects in the Centennial State.

u

Daylight & Wellness Channel Glass u Translucent Roofing

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Curtainwalls Green Roofs u Shingle Selection u Shading & Glazing

u u

Water Infrastructure Mixing Valves u Efficient Fixtures u Permeable Pavers

u

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Downlighting POE-Connectivity u Tapping into Big Data u Reflective Optics

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By Barbara Horwitz-Bennett

www.nzbmagazine.com

Distributed Wind

By Alan Weis

By Kevin Willmorth

By John Mesenbrink

Landmark Geo Big Data u College VRF u Heat Recovery By John Mesenbrink

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JULY 2018

Re-Introducing…

THE ANNUAL NZB AWARDS

VOL. 7, NO. 3

NET ZERO BUILDINGS

NET ZERO BUILDINGS

Premier Issue: Jan. 2013

Premier Issue: Jan. 2013

Gary Redmond

Managing Partner Director Publishing Operations gredmond@cbmedia.us.com

NET ZERO BUILDINGS Premier Issue: Jan. 2013

Tim Shea

Managing Partner Director Business Development tshea@cbmedia.us.com

Dave Pape

Jim Crockett

Vice President Director, Art & Production dpape @cbmedia.us.com

Editorial Director jcrockett@cbmedia.us.com

NET ZERO BUILDINGS

NET ZERO BUILDINGS

Premier Issue: Jan. 2013

Premier Issue: Jan. 2013

NET ZERO BUILDINGS

EDITORIAL

Premier Issue: Jan. 2013

E NVE LO PE

DAYL IGHT IN G

POW ER

Alan Weis

Barbara Horwitz-Bennett Contributing Writer

Chuck Ross

Contributing Writer

L IGHT ING

WAT E R

HVAC

Contributing Writer

Kevin Willmorth

John Mesenbrink

Contributing Writer

John Mesenbrink

Contributing Editor

Contributing Editor

Megan Mazzocco

Senior Editor mmazzocco@cbmedia.us.com

One of the major criteria that differentiates net zero projects vs. say, a LEED-certified project, is that net zero certification typically requires verification of performance for at least a year’s worth of operation. In that spirit, for NZB’s inaugural awards program later this year, we’d like to highlight outstanding examples of product and technology in application, whether included as part of an efficient system or for more singular performance. In concert with our established “pillars,” we’ll be looking at technology applications within the categories of the building envelope, daylighting, lighting, HVAC, water/plumbing, and on-site power/renewables. These system-level entries do not necessarily have to be associated with a net zero project, but should be associated with a high-performance design.

ART + PRODUCTION Dave Pape

Art Director dpape@cbmedia.us.com

Lauren Lenkowski

Alex Mastera

Associate Art Director llenkowski@cbmedia.us.com llenkowski @cbmedia.us.com

Associate Art Director amastera@cbmedia.us.com

On the net zero level, we will also recognize a net zero project of the year, which may be a project already certified, or one under consideration. And to recognize the effort and work that goes into creating a net zero ADVERTISING SALES

project we will also be issuing citations for:   

BEST INTEGRATED PROCESS BEST ENERGY MODELING EFFORT BEST CONTINUOUS COMMISSIONING EFFORT

On a product level, we’d also like to recognize R+D and efforts to create products that will help further the net zero movement, in the following categories: MOST PROMISING NEW TECHNOLOGY  BEST HYBRID PRODUCT PARTNERSHIP—Where two or more manufacturers have worked together to develop a single product that will better serve the design community  MOST PROMISING ELECTRONIC DESIGN TOOLS 

Details and deadline information will be available soon. Questions should be directed to Jim Crockett: jcrockett@cbmedia.us.com

Gary Redmond

847 359 6493 gredmond @cbmedia.us.com

Bob Fox

917 273 8062 bfox@cbmedia.us.com bfox @cbmedia.us.com

David Haggett

847 934 9123 dhagg dha ggett gg ett@cbmedia.us.com ett @cbmedia.us.com

Tim Shea

Michael Boyle

847 359 6493 tshea@cbmedia.us.com tshea @cbmedia.us.com

847 359 6493 mboy mbo yle le@cbmedia.us.com @cbmedia.us.com

Jim Führer

Jim Oestmann

503 227 1381 jfuhrer fuhrer@cbmedia.us.com @cbmedia.us.com

847 838 0500 joestmann@cbmedia.us.com

Ted Rzempoluch

609 361 1733 trzemp trzem poluch@cbmedia.us.com

Net Zero Buildings (NZB), Vol. 7, No. 3. Published five times per year by Construction Business Media. Publication Office: Construction Business Media, 579 First Bank Drive, Suite 220, Palatine, IL 60067; 847 359 6493; www.nzbmagazine.com. (Copyright © 2018 by Construction Business Media) A Publication of Construction Business Media

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| TOWARD ZERØ |

JIM CROCKETT

Ode to Collaboration... and a Colleague Hemingway, after a tragic moment in “A Farewell to Arms,” has his protagonist pronounce, “The world breaks everyone, and afterward many are strong at the broken places. But those that will not break, it kills.” In living on, may we turn scars into something stronger, even beautiful.

With a very heavy heart, it is my sad duty to inform our readership that one of the soldiers in the fight for net zero has been lost: Alex Mastera, the gentleman very much the soul of the art and design of NZB each issue, passed away recently, totally unexpected and with great loss. In fact, at his wake, his wife Kelly had on display a portfolio he recently completed, which included a lot of content from the magazine, including the March 2017 cover story on energy modeling. I’m not too proud to say that I got choked up seeing it, as Kelly told me the magazine and the staff meant a great deal to him. In these pages, we often talk about integrated design, collaboration and the importance of teamwork. It is quite apropos that we, in producing this publication, live these same values in

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bringing each issue to bear. Alex, who came to us about five years ago with an architectural background from the University of Nebraska, was all in on collaboration—very much caring what the stories were about, and what facets might be worth emphasizing in a better way. This was critical, for in writing and producing a magazine often about energy savings and technical matters, it’s easy to drift into the weeds, and easy to present content with lots of text and diagrams. But for those with an aesthetic eye— and that goes for our entire art staff—that’s not good enough, and I’m often challenged to step up, and dig deeper for better imagery, so that our books not only read well, but look good and communicate a definitive narrative. This sometimes means conflict—and believe me, we had our share—but the end result is worth it. It reminds of something Rick Alfandre, the man behind this issue’s Project Zero feature, said to me about

implementing architecture into heavily engineered, energycentric buildings. “We really need to keep balance in mind.” In the case of the Hudson Valley office project he created, he didn’t want to mandate any “restrictions” on his tenants, and very much wanted them to feel at peace and relaxed, as if they were at home—at the least, thermally comfortable. In the end, however, he says such a “fuzzy” metric must be transformed into something concrete to add value for the appraisal aspect of net zero projects—perhaps one of the greatest challenges the community faces in getting more net zero project built— as there simply isn’t any comparable real estate data right now, and that hurts financing opportunities. This, he says, means even greater collaboration, as his firm had to put its assorted collection of data into the hands

of a consultant who could extract hard numbers from it. Further, that cooperation, he says, must extend to the trades, as without their understanding or buy in, you’ll have problems you won’t be able to catch until much later in the process, often times too late. So, in Alex’s memory and spirit, I ask all of you, with an open heart and mind, to continue carrying the torch for greater integration, discussion and collaboration—even if it’s somewhat contentious or with people you don’t necessarily want to involve or consult. For at the end of the day we are only as strong as our weakest link, and right now this movement has some serious tempering issues it must overcome.

Jim Crockett, Editorial Director

jcrockett@cbmedia.us.com

www.nzbmagazine.com

6/28/18 13:10


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231 Main Street New Paltz, N.Y. 231 Main Street is the home to the offices of Alfandre Architecture, Integral Building and Design, EcoBuilders, as well as a civil engineering firm, an attorney and a nutritionist.

| PROJECT ZERØ |

ALFANDRE ARCHITECTURE

Market: Office Size: 5400 sq. ft. Architect: Alfandre Architecture MEP Engineers: TAITEM Data Analysis: TAITEM General Contractor: EcoBuilders Text: Jim Crockett

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NEW PALTZ, N.Y.

Net Zero Buildings, Main Street Style The architect-developer of a small town office following Passive House principles earns a nice surprise: his project is actually net positive. Rick Alfandre, AIA LEED AP BD+C, has been designing and building passive house-caliber homes and buildings for years. In fact, when it came time to design a new office for his

5,400-sq.-ft. operation in New York’s Hudson Valley, about 90 miles from New York City, he wasn’t even thinking about creating a netzero, let alone netpositive building. “LEED Gold was the original intent, but we just really wanted to be as effective as possible,” says the architect/developer/ builder of what would become 231 Main Street, a LEED Platinum, netzero energy commercial office building in New Paltz, N.Y. The project resides on the quintessential “main street”—across the street from a bank, and neighbor to a church, supermarket, cleaners, hardware store, etc. Other than the modicum of photovoltaics it employs, and its non-traditional main street architecture, the building is not that

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different from the kind of small to mid-sized buildings we see everywhere in most towns and suburbs. How it performs is another matter: The total EUI predicted for the project before solar was installed, according to modeling efforts, was 32.2; actual EUI—16.4. Its total EUI after solar power was factored, was -0.9—modeling had predicted 16. “The design engineers [TAITEM Engineers] thought we would use more than double the energy the building consumes,” says Alfandre, adding perhaps the greatest lesson learned from a net zero perspective, was not to get too overboard worrying about PV offsets. But as far as power, the office’s 130 PV modules generate roughly 41,370 kWh/year—about 10% higher than projected. The surprising EUI stems not only from a conservative estimate of PV production, but the fact that the envelope truly delivers. “The envelope is very robust, and there’s a Passive House influence for sure,” says Alfandre. “I have a long history in this [passive] space— back when it was considered ‘alternative.’ But costs and performance certainly have improved a long way since those days. And in the end, we simply did our best to be climatically responsible.”

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TIMELINE  2013: Planning  2014: Substantial completion As this very much was a “Main Street” project, Alfandre didn’t want to do anything out of the ordinary as far as the look of the building, or even building systems, other than PV. In fact, he also did not wish to put any kind of special restrictions on his future tenants—the goal was always to do the best job possible. “Net zero is totally doable, and smaller-scale projects like this are everywhere in the U.S.” That said, Alfandre did have a few desired outcomes: tall floor heights, no direct sunlight or glare, a low windowto-wall ratio, and fewer corners. But as far as aesthetics, he very much wanted tenants to feel at peace and relaxed, as if they were at home. Interiors feature lots of wood, high ceilings, and are generally thermally comfortable. But because he was going to be working in the space, Alfandre admits his motivation was higher than the typical developer “we’llsee-what-we-can-do” attitude that happens on most speculative office projects. But in truth, he was more inspired to achieve the same reaction of another client for which he had delivered a medical/manufacturing operation, whose big wish was simply a very efficient and solar-powered facility. “They love their building—that really became the objective of this project as well.”

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POWER

Renewables consist of a 34.06kW STC grid-tied, roofmounted, commercial photovoltaic array that includes 130 Conergy PE260P watt UL-listed modules, with and 130 Enphase M215 Series inverters. Average production over two years was 42,590 kWh/ year, which is about 10% higher than projected. Estimated production in the local utility contract, says Alfandre, was 38,877 kWh/year. “Production may vary 9%, and could vary by as much as 30%.”

While the system has produced well beyond expectations, Alfandre says there were some “teething” problems. For example, they saw zero production for a couple weeks in early 2014, and low production for a about three weeks in early 2015. These teething problems, he said, resulted in production averaging closer to 36,606 kWh/year in 2014 and 2015, which was 5.6% lower than estimated in the contract. But the bottom line is that solar production is about 10% more than expected. They key, he says, is catching potential problems. Automatic online monitoring and reporting,

which is not required by code, will absolutely help, and in his opinion is worth the investment. A couple of other hiccups to consider are orientation and potential blocking obstacles. Ideally, he would have liked to orient the array to take advantage of the greatest southern exposure possible, but that just wasn’t going to work on the site. Beyond orientation, another issue was foliage. The site had a number of mature trees, and he didn’t want to remove them. “It wasn’t a function of efficiency, but one of aesthetics.” Ultimately, designers really need to keep balance in

mind. “That’s why I say you need to push the envelope even more.” PV has certainly improved their operation’s bottom line—the power is bill as low as $35 per month plus fees—most of it comes from delivery charges. “We really generate so much power, we don’t get charged for it.”

WEAN AWAY  There’s no battery storage on the project—another early adopter pitfall. The building is grid-tied and net metered. Alfandre’s renewables goal was solar helping them avoid demand charges, while also giving them a chance to wean away from natural gas as much as possible.

Unlike a lot of utilities— Central Hudson—has been very accommodating. That doesn’t mean others won’t have issues. “Solar still has hurdles with net metering and community issues. That’s why I say always put your money first into the building’s performance.”

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t RENEWABLE POWER The PV cells located on the roof have collected more than 173 MWh of energy since the panels have been installed.

t INSULATED ROOFING In addition to a 4-in. rigid foam at slab, there is a roof assembly that is a 16-in. deep structural insulated roof system.

BRIDGE ELIMINATING Building exterior walls with insulated concrete forms— down to the foundation— provides an airtight insulated building enclosure that is extremely resilient, with no thermal bridging. t

ENVELOPE

Robust may be not quite descriptive. Insulated concrete forms, right to the foundation, help create an airtight wall assembly. There’s also a 4-in. rigid foam at slab, and the roof assembly is a 16-in. deep structural insulated roof system. “All of our exterior walls are built with insulated concrete forms all the way down to the foundation. This type of construction provides an airtight insulated building enclosure that is extremely resilient with no thermal bridging,” says the architect. The high-performance SIPs offer the strength of a steeI beam. “Not only

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are they much faster to install, but they are one of the most environmentally responsible building systems available,” says Alfandre. The building also has a low window-to-wall ratio. Alfandre prefers under 20%. Triple-pane glazing delivers R-7 performance. Of course, the biggest key to achieving the impressive numbers they did was by minimizing thermal bridging via continuous insulation. The results speak for themselves: the final air leakage was 0.59 ACH. In fact, through blower door tests and thermographic analyses, the office was

found to have an air tightness of 0.6 air changes per hour—the energy code only required a maximum of 3.0 air changes per hour, notes Alfandre. In trying to achieve similar results, Alfandre suggests designers think about avoiding complex shapes and stick with a more modest surface area. The form on this project, in fact, was driven by energy goals and structural issues. Regarding the latter, the architectbuilder initially thought about a wood structure, but opted for insulated concrete, as Alfandre says, “it’s also great for sound abatement.”

Another suggestion to focus on regarding net-zero projects—the labor force. Education, he says, is key. Alfandre is fortunate to own his own construction company, EcoBuilders. “That was a huge advantage, but to achieve these kinds of results requires subs who care. If not, you’re going to have real problems you won’t catch until later,” such as thermal bridging issues from improperly attached cladding and insulation.

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Data Equals Money Data monitoring, metering and collection is always a challenge on any net-zero project, but data analysis is perhaps the toughest issue in this area, notes Alfandre. Today, he says there are tools like eGauge, which allow operators to measure at each circuit. “We’ll definitely be doing that on our next building,” he says. But alas, when they started this process five years ago, the tool was not available. The only way to calculate the savings the building was accruing, was pretty much by hand, by reviewing utility bills. “We did have a web interface for the 130-module PV system, as far as what was being generated,” says Alfandre. It, however, was almost a byzantine process which required a special consultant to sort through it all. “TAITEM had a very detailed process of how they crunched these numbers. In fact, TAITEM did it twice to make sure the results matched up,” recalls Alfandre. In the end, however, this data was essential, as he needed it to translate their effort into real “added value” for appraisal aspect of the project. “We had to go back to the appraisers with spread sheets full of data so they could re-evaluate.” This is an issue he can’t emphasize enough; it’s difficult to gauge valuations for smaller projects—as the real estate comparisons are just not there. And, cost was definitely on his mind, as he had to take out a 30% loan to cover the value of the project.

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THE ACTUAL EUI FOR THE PROJECT BEFORE INSTALLING SOLAR, ACCORDING TO MODELING EFFORTS, WAS 16.4. ITS TOTAL EUI AFTER SOLAR POWER WAS FACTORED WAS 0.9.

HVAC

Goals for HVAC focused on indoor air quality management as much as thermal comfort: use low-emitting materials; increase ventilation; incorporate sound attenuation; deliver occupant input on comfort. For the project they turned to heat pumps and energy-recovery ventilation, paired with demand-controlled ventilation. “Heat pumps work well with solar PV, as they are all-electric.” The system was composed of the following: ERV—1 RenewAire, capable of up to 1100 CFM; Air-to-Air Carrier “Greenspeed” Infinity Heat Pumps; a contingency Carrier Multi-poise

Variable Capacity Condensing Gas Furnace; multiple zoned controls. Like data monitoring, the good news is that today there’s much better IAQ monitoring tech available than when they commissioned the project, notably on the CO2 and VOC monitoring front. This data, he says, will definitely affect future ventilation systems they install. “We’re looking into incorporating more demand ventilation,” says Alfandre. “There’s just too many studies showing the benefits of health and cognitive benefits.”

OCCUPANT COMFORT Indoor air quality and thermal comfort were HVAC goals so the project turned to heat pumps and energy-recovery ventilation, paired with demandcontrolled ventilation.

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| PROJECT ZERO |

 SUNSHINE APLENTY The windows throughout the office allow the maximum amount of daylight into each office space without heating up the space.

OFFICE LIGHTING In trying to maintain acceptable footcandle levels, highefficiency LED lighting, with integrated occupancy and daylight sensors, are featured in the office.

In typical buildings where windows face the south, the space would heat up immensely. Because of triple-paned windows, daylight is allowed without heating up the space. 

DAYLIGHTING

LIGHTING

High-efficiency lighting, primarily LED, with integrated occupancy and daylight sensors, are featured throughout. Beyond LED, Alfandre says it’s important to design to the correct level footcandles required. So, for offices, he says, that number is only around 30 fc.

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Efficient lighting controls are also crucial. In the space, the team primarily used motion/occupancy sensors, which were also included for exterior lighting. A key lesson learned, says Alfandre, is to set off delays as short as possible, preferably under a minute. The off-delay, he says, is the time that the light stays on after the end of occupancy.

Outside, parking lights dim when no movement is present. The design is also dark sky and neighbor friendly, as site lighting approaches zero fc at the property’s edge. Finally, the building lights turn off at 11 p.m.

The key to worker productivity and wellbeing can be tied into a building’s air quality. But just as important is the proper amount of daylight brought into a building. Although the Alfandre office building’s window-to-wall ratio was low, windows are strategically placed, and provide abundant natural light. Transom windows on the ground floor maximize daylight. “The

windows throughout the office allow the maximum amount of daylight into each office space without heating up the space,” says the architect. “In typical buildings, where windows face the south, the space would heat up immensely. But because of our triple-paned windows, we can allow the daylight without heating up the space,” says the architect.

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Beyond water-saving fixtures, to increase the project’s water efficiency, rainwater is collected from the roof and reused to flush toilets. “In our office, we use about 11 kGal for our toilets and irrigation system compared to the average of 31.91 kGal in an average building.”

the site. A continuous swale directs water to rear of site.

A filter removes initial debris and pollutants from the rainwater; water is then stored in a 1500-gallon tank until it is needed. In the parking lot, porous pavers allow rainwater to be diverted and better seep into the ground, helping reduce stormwater runoff from

The minimum monthly rain, multiplied by 0.46 gallons, multiplied by the roof area, equals 1.28 kGals a month. Annually at this rate, 15.35 kGals of rain will be available for the flush fixtures and irrigation systems.

“1-in. rainfall on a 1 ft. × 1 ft. area of roof is equal to 0.62 gallons of water. With an estimated system efficiency of 75%, we have approximately 0.46 gallons/sq. ft. of roof area.”

“Based on the low-flow toilets, (0.8 gpf) and occupant data, we project to use 11.2 kGals of water for flush fixtures annually. This is well below the conservative estimate of 15.35 kGals of nonpotable water provided for flush fixtures and irrigation systems.”

BY THE NUMBERS: Annual projected potable water usage for all flush fixtures: 11,200 gallons Estimated annual projection for non-potable water provided by rain harvest system: 54,750 gallons

Waurn Ponds, Australia | Gray Puksand Architects

PERMEABLE PAVERS In the parking lot, porous pavers were used to allow the rainwater to be diverted and go into the ground. This helps reduce the amount stormwater runoff from the site.

Porous or permeable pavers, combined with subsurface storage/infiltration chambers, were used to control stormwater runoff and reduce it to predevelopment rates.

photos: Mark Duffus ®

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| PROJECT ZERO | Working with the Community According to Alfandre, the city of New Paltz is open minded, “The area is fairly progressive.” Granted, he ran into some umbrage in that the building was not historic looking. “But the environmental aspect was important, and became a statement to developers that the town is going to start asking, in the review process, that some of these things be done on future projects, so there might be heavier lift requirements, so to speak.” He points to a local casino developer who was asked if they could deliver a LEED certification.

SUMMIT RANCHO BERNARDO

From a bigger-picture perspective, he doesn’t know if the town or the development community are prepared to deliver net-zero sub-divisions and communities. “It would be great.” There has been some activity in the region to do so, incorporating geothermal and PV, but from an architectural perspective, Alfandre is not happy with the results. “But they do show net zero can be done effectively.”

Lighting controls are complex, and need adjustment; glare in winter is an issue and thus requires shades. As far as future goals Alfandre says they will continue to monitor and analyze data to verify the building continues to operate as it is intended: water use; rainwater; domestic irrigation; energy use; utility data; solar data; and continue to update site landscape.

As far as post-occupancy issues, they’ve unearthed some flags for next time: Parking is not abundant and can occasionally be an issue; “The rainwater harvest system can be tricky. It took some time to work out problems.”

n

As far as legacy, Alfandre isn’t so caught up in the net zero aspect, but hopes the project will stand the test of time, and more so, it’s impact on the environment. “Buildings of lasting or timeless beauty, which are designed in a manner that enhances a sense of place and a sense of quality, are buildings that will endure the passage of time. The longevity of a building, and therefore, the cost to the environment of renovating or replacing the building, is of critical importance to the environment.”

NET-ZERO FUTURE The city of New Paltz, N.Y., is fairly progressive. Will net zero be done on future projects? Alfandre isn’t sure if the town is prepared to deliver net zero communities, but some activity shows that net zero can be done effectively.

NEW PALTZ, NY

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CHUCK ROSS

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POWER

DISTRIBUTED WIND THE PROMISED RETURNS ON BUILDING-MOUNTED WIND TURBINES HAVE NEVER MATERIALIZED, BUT LARGER INSTALLATIONS ARE BECOMING MORE POPULAR, ESPECIALLY FOR INDUSTRIAL CUSTOMERS SEEKING PREDICTABLE PRICING.

Distributed wind was once a darling of the renewable energy industry, with startups in the first decade of the 21st century tripping over each other with new designs for, among other ideas, parapet-mounted whirligigs promised to produce large

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percentages of a building’s power needs. Well, that vision has fallen short, but more practical–and larger– installations have proved successful. To start with a definition, “distributed wind” refers to wind turbines installed at or near the point of end use, according to the U.S. Department of Energy

(DOE). That could be behind the meter at a customer site, directly to a utility’s distribution system or directly powering an off-grid location. In other words, these are wind turbines on the distribution side (or off grid), and not connected to long-distance transmission lines. They can be further classified by size, as follows:

 Small- capacity of up to 100 kilowatts (kW)  Medium- capacity of between 101 kW and 1 megawatt (MW)  Large- capacity above 1 megawatt (MW)

Small wind turbines have long been a part of agricultural operations, powering well pumps and other remote electrically driven equipment.

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POWER CLEAN ENERGY FOR CLEANING PRODUCT MANUFACTURER In their first full year of operation, the wind turbines produced nearly 8 million kilowatt hours (kWh) of electricity – enough to power 700 homes over the course of a year.

SOLAR ROOF TILE, WITH AN ASIAN FLAIR Upgraded Hantile solar roof tiles pair thin-film photovoltaic technology with a design based on traditional Chinese roofing products. The new tiles use only a single layer of glass–the original version used two layers–while maintaining a thin profile. A threepoint fixing structure helps maintain maximum resistance.

 DYNAMIC DUO Waxdale is SC Johnson’s largest global manufacturing facility, located in Mt. Pleasant, Wis. The two 1.5 MW wind turbines, installed in 2012, meet 15% of the plant’s annual electricity demand. A pair of cogeneration turbines meet the remainder of demand, fueled in part by methane gas supplied from a local landfill.

Hanergy America www.hanergyamerica.com CIRCLE 307

“THE RATES OF RETURN FOR RENEWABLES ARE LONGER—THIS ISN’T LIKE CAPITAL RETURNS FOR MANUFACTURING EQUIPMENT.” —WES SLAYMAKER, PRESIDENT, WES ENGINEERING

MULTI-FAMILY IN MIND The EnSync Home Energy System brings together packaged solar and storage control capabilities along with peer-to-peer energy exchange capabilities, allowing linked units to share energy with each other. In multi-family applications, residences are interconnected using a DC-power link, allowing excess generation to be shared with units experiencing a deficit in power availability. EnSync Energy www.ensync.com CIRCLE 306

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These turbines, often with a capacity of 10 kW or less, are generally installed with a recognition of the need for a tower height tall enough to maximize their access to available wind resources. These are requirements some of the urban, building-mounted models developed in the early 2000s overlooked. Most of the makers of building-integrated turbines have since gone out of business, but standard, tower-based turbines continue to attract interest. Especially appealing to potential clients are new power purchase agreements (PPAs) that require no upfront costs and offer guaranteed electricity prices over the length of a 10- to 20-year contract. By the end of 2017, distributed wind installed capacity surpassed 1 gigawatt (GW) of capacity, according to the Pacific Northwest National Laboratory (PNNL). For the next several years, these installations will continue to benefit from recent incentive-related legislation. The Bipartisan Budget Act of 2018 reinstated the Residential Renewable Energy Tax Credit for small turbines placed in service 2017 through 2021, and it extended the Business Energy Investment Tax Credit for projects put into service by 2023. These credits, which both face phase-out schedules

U.S. DISTRIBUTED WIND Although demand has slowed, cumulative capacity did hit 992 MW by the end of 2016, and crossed the 1 GW threshold in 2017. The Pacific Northwest National Laboratory’s 2016 Distributed Wind Report found that, while overall capacity is driven by the output of large turbines over 1 MW, the biggest increase is in the 10 kW and lower size range.

reducing their value year-over-year, put related projects at near-parity with solar photovoltaic (PV) installations.

Interest growing for larger models Alice Orrell, a PNNL analyst and an author of the lab’s 2017 Distributed Wind Market Report, due in July, along with the five annual editions that preceded it, says the market for the lowest-capacity turbines remains small. Similarly, mid-capacity manufacturers also are facing challenges.

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POWER

IN THE NEWS

LEARNING TO FLY u Using the impetus of 2016 legislation requiring the state of Massachusetts to procure up to 1,600 MW offshore wind by 2027, an area off the coast of Martha’s Vineyard will be developed.

Offshore Wind to Anchor Off Massachusetts Coastline

Photo: Rhode Island Public Radio

Sixteen years after its first proposed offshore wind farm, Massachusetts finally has a signed contract for an 800 MW installation, planned to begin operating by 2021. That initial proposal, Cape Wind, failed after siting protests. However, this new development is supported by 2016 legislation requiring the state to procure up to 1,600 MW of offshore wind capacity by 2027. Vineyard Wind, a partnership of Copenhagen Infrastructure Partners and Avangrid Renewables, will develop an area 15 miles off the southern coast of Martha’s Vineyard. On the same day as the Massachusetts announcement, Rhode Island accepted a proposal from Vineyard Wind competitor Deepwater Wind for a separate 400 MW wind farm off its own coast.

“There are not a lot of manufacturers in that space -you have to have the right fit for that size turbine,” she says, adding that there appears to be growing interest in turbines over 1 MW. “We’ve seen an increase in large turbines, both behind the meter and serving the local distribution grid.” At the smaller end of the spectrum, Orrell says, wind can end up competing against similarly sized PV systems for onsite-power generation, especially because wind at that scale can have higher “soft” costs, including expenses for customer-acquisition, project planning and permitting, and installation. At larger scales, the greater power output might help balance out soft costs–plus, at that size, wind offers advantages for space-constrained sites. Orrell is not a fan, however, of building-integrated turbines. “We don’t recommend putting turbines on rooftops. The wind is very turbulent up there, especially in urban environments, and it’s hard

to measure that wind speed in advance. If you’re really interested in generating energy, you need to have a well-sited turbine.” She adds that buyers should seek out turbines that have been certified by accredited organizations, such as the Small Wind Certification Council. That organization oversees testing through organizations like the DOE’s National Renewable Energy Laboratory to ensure accurate capacity and performance claims. “You might still have a problem,” Orrell says, “but the certification process is supposed to weed out turbines that aren’t going to work well.

Direct Ownership Wes Slaymaker, president of WES Engineering, a Madison, Wis.-based developer of both onsite wind and solar projects, says onsite wind development has been slow over the last several years. Most recently, though, he says he has seen

IN THE NEWS

Going With The Flow One of the nation’s largest flow battery systems has enrolled for classes at Holy Name Jr./Sr. High School in Worcester, Mass. The 3 megawatt-hour Vanadium Redox system from Vionx,

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based in nearby Woburn, Mass., will store energy from the school’s own utility-scale wind turbine, as well as a variety of other sources from the surrounding community, for discharge as an

onsite electricity source for up to six hours a day. The installation was constructed in a partnership that included Vionx, local utility National Grid and Worcester Polytechnic Institute. Its performance

will be evaluated through 13 specific use case applications to provide National Grid with data on operating grid-scale distributed resources as utility assets.

20 u PORTABLE SOLAR Sunsoaker 5-watt and 10watt thin-film charging kits won’t power a house, but they will provide portable power wherever the sun is shining. The kits come with both carabiners and suction cups for optimal positioning, and they can be rolled up for easy carrying and storage when not in use. Sunsoaker www.sun-soaker.com CIRCLE 305

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POWER R&D

The Secret Sauce Connecting Tesla’s Solar Roofs A recently approved patent application is offering insight into some of the technology behind the roofs’ production. The patent for a proprietary conductive paste paired with an equally Tesla-centric curing process may answer questions as to how current flows from module to module.

Rooftop Solar To Become A New Home Standard In California Rooftop solar panels will no longer be simply an option for buyers of new homes in California, beginning in 2020, under the latest iteration of the California Energy Commission’s Title 24 energy standard. Approved in

May and effective Jan. 1, 2020, the standard – which previously only required new homes to be solar-ready–mandates the installation of rooftop or common systems

THE SOLAR INDUSTRY HAS CREATED $43 BILLION OF INVESTMENT IN CALIFORNIA’S ECONOMY AND EMPLOYS MORE THAN 86,000 CALIFORNIANS, A NUMBER THAT WILL GROW UNDER THE NEW ROOFTOP SOLAR POLICY.

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an uptick in interest in site studies for corporate customers. This could be, in part, a result of the publicity a number of global tech brands like Google and Apple have garnered for PPAs they’ve signed to power their operations. Like Orrell, Slaymaker says bigger turbines offer the most reliable bottom-line opportunities. “The real economical machines for long-term ownership are larger turbines, starting at the 1.5 MW range,” he says. Even at this scale, though, he adds, buyers are more likely to be privately held companies comfortable with extended payback periods. “The rates of return for renewables are longer—this isn’t like capital returns for manufacturing equipment.”

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sized to net-out homes’ annual kilowatt-hour demand. Homes sited in predominantly shady locations are exempt. California is the nation’s top solar market with nearly 40% of the total

solar installed in the U.S. The solar industry has created $43B of investment in California’s economy and employs more than 86,000 Californians, a number that will grow under the new policy.

Though the roofs appear to installed as individual tiles, they’re manufactured as multi-tile panels. The patent drawings illustrate the use of the paste, instead of convection or solder binding, to join individual modules (“shingles”) together. According to the application, the assemblies would then pass through a proprietary curing process, to bind the cells in a cascade formation that mimics the appearance of traditional roofing tiles or shingles.

Most of his projects are installed behind the customer’s meter. This was the case, for example, with the two 1.5 MW turbines he installed for SC Johnson’s Waxdale plant in Mt. Pleasant, Wis., profiled in the May 2015 issue of Net Zero Buildings. In these projects, land needs to be available on the customer’s campus, or available to purchase within a mile to minimize connection costs. Slaymaker says the majority of his projects are structured similarly to the SC Johnson job, with the customer buying the turbines outright to directly serve their own operations, rather than through a utility net-metering agreement. “There’s more interest in going behind the meter because the utility is not interested in the distributed-generation energy,” he says, noting that utilities aren’t interested in paying retail electricity rates. “If they want to buy renewables, they can buy it cheaper.”

Selling Power, Not Turbines Findlay, Ohio-based One Energy has built its onsite-wind business by selling power, instead of turbines. Founded in 2009, the company targets industrial customers with demand that falls within a sweet spot easily served by one or more of its standard Goldwind 1.5 MW turbines. Customers pay nothing upfront, and instead sign a PPA with

PROPRIETARY PASTE Conductive paste paired with a curing process may answer questions as to how current flows from modules.

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POWER

IN THE NEWS

Intel , Powered By The Sun Powering Intel’s chip-manufacturing system in the U.S. and Europe with 100% renewable energy takes a lot of solar panels – more than 3 million sq. ft. of them, in fact. That’s the total installed across its international campuses, including its Ocatillo, Ariz., facility, shown here, according to the company’s 2017-2018 Corporate Responsibility Report. The company now has more than 8,000 solar parking spots installed worldwide.

This solar parking installation protects cars from the desert sun while also generating onsite power.

IN THE NEWS

One Energy guaranteeing electricity rates over a 20-year contract. “We ask for no capital expenditure–they just buy the electricity they produce,” says Angela Deboskey, the company’s marketing lead, a role One Energy describes as Head of Storytelling. “It really makes a lot of sense for industrial users, because they recognize the savings right from the start, and a lot of companies don’t want that cost on their books.” The company has focused its operations in Ohio, where state net-metering laws favor its business model. It seeks out plants with a minimum usage of 4 million kilowatt-hours annually, along with, of course, an adequate wind resource. This ensures the turbines’ output doesn’t out-produce

the facility’s demand. Signature projects for the company include turbines at three Whirlpool Corp. manufacturing plants in Findlay, Marion and Ottawa, Ohio, with construction now underway at a fourth plant in Greenville, Ohio. In addition to an in-house engineering and construction staff, One Energy also maintains its own stock of towers and turbines, enabling projects to go from planning to completion within two business quarters. Though the current tax credits certainly contribute to the company’s profitability, Deboskey predicts the overall success of the Wind for Industry program … “As the current phase-out plans continue, we are definitely in it for the long haul,” she says. “It still makes great financial sense.”

 One Energy sells kilowatt-hours, not wind turbines, and secure power pricing is just as important to its customers as renewably sourced electricity. These projects are installed behind the customer’s meter and are sized so as not to produce more power than the facility can use. Net-metering excess production back to the utility isn’t allowed in Ohio where all One Energy’s current projects are located.

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GE Announces World’s Most Powerful Wind Turbine The only place you’ll see GE’s new Haliade-X wind turbine distributed will be out at sea, but, at

the largest end of the wind-production spectrum, this new design promises a nameplate capacity of 12 MW, standing at a height of more than 850 ft. above the ocean’s surface. The turbine, with its 107-ft.long blades, will offer a 63% capacity factor, enabling production of up to 45% more energy than any offshore turbine available.

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DAYLIGHTING

BARBARA HORWITZ-BENNETT

| NZB: DAYLIGHTING |

Targeting Systems Synergy Leveraging the expertise of the full building team is key to optimizing integrated daylighting designs. The challenge becomes harnessing advanced daylighting technology and the major players involved—manufacturers, architects, engineers and consultants—for each project.

Barbara HorwitzBennett has been reporting on the architectural industry for the past 15 years. She covers glazing and daylighting for Architectural Products, and in 2011 contributed to an important industry white paper on net-zero buildings.

I

n the quest to make potentially good buildings great, one of the main challenges is figuring out how to harness and pool the advanced daylighting technology and expertise spread amongst manufacturers, architects, daylighting consultants and engineers for each individualized project. Offering some perspective, John Andary, P.E., LEED AP, senior principal, Integral Group, Oakland, Calif., explains, “product manufacturers have the luxury of only needing to solve a narrow or specific condition while architects and engineers are synthesizing a wide range of components and ideas into a complete design. Successful partnerships are dependent on product manufacturers that can see or appreciate the holistic vision, and how their particular piece plays as part of a whole.” Essentially, manufacturers are experts on the performance of their products and it’s the architects’ job to creatively incorporate those technologies to best optimize their performance, adds Colin Blackford, director of strategy & innovation, Mermet USA, Cowpens, S.C.

Associate, CSI, national architectural manager, Vitro Architectural Glass, Pittsburgh. “Optimally, you want as many stakeholders involved early in the process as is feasible.” In addressing a particular project, architects need to understand and embrace the energy and thermal/visual comfort implications of façade movement and engineers must understand and embrace the design thinking behind the architectural decision, adds Andary. “When the team is aligned over the whys of design decisions, really great high performance buildings can happen.”

Making it Work To begin, net-zero expert Bill MaClay, AIA, LEED AP, principal, Maclay Architects, Waitsfield, Vt., offers a brief summary of recommended daylighting design strategies as spelled out in his book, The New Net Zero.

But in order to make this all work, a high level of coordination and collaboration is essential, particularly when it comes to daylighting. “To achieve all of the benefits of daylighting, from enhanced energy efficiency and cost savings to maximum occupant comfort, all parties need to understand the full scope of the project—the location and orientation of the building, the layout of the interior, the intended use of the space, climate limitations, where the sun is coming in and at what the angles, and the amount of light exposed to the interior,” explains Emily Dritz, LEED Green

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DAYLIGHTING DAYLIGHTING DEEP DIVE By optimally combining light shelving, overhangs and shading devices with high-performance glazing, Pittsburgh’s Center for Sustainable Landscapes at Phipps Conservatory brings large amounts of light deep into the interior space.

CASE STUDY

An impressive new pedway linking the UofL Physicians HealthCare Outpatient Center and to the parking garage at the University of Louisville Physicians Novak Center for Children’s Health at the University of Louisville’s Health Sciences Center is fabricated with a digitally printed grid pattern of gray blocks. Measuring approximately 63 inches wide and 1 inch thick, and varying in height between 47 inches and 120 inches tall, no two panes are exactly alike, thereby producing an abstract design, as seen from afar, with Digital Distinctions printed glass, manufactured by Viracon. Viracon www.viracon.com

Photo: Vitro Architectural Glass

U OF L PHYSICIANS HEALTHCARE OUTPATIENT CENTER Louisville, Ky.

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 Begin with a narrow floorplate. With 10- to 12inch ceilings, daylight only effectively penetrates into spaces 10 to 15 feet directly, and up to 20 feet with light shelves or light louvers.

CIRCLE 304

MINIMIZING GLARE In designing an upper band of daylighting windows with adjustable louvers, and reducing the size of lower view windows, daylighting was maximized and glare was minimized at NRG Systems’ LEED Gold-certified facility in Hinesburg, Vt.

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 Locate building uses based on daylight needs. Position habitable spaces near exterior walls with open spaces on the exterior and little used spaces to the interior of the building.  Orient the building to optimize daylighting along the east-west axis. This will mean that most windows are facing south or north. South-facing windows minimize summer cooling as the sun is high in the sky and allow for deep penetration of sun in the winter. If shading is needed, it is easy and effective on the south side of buildings. In contrast, east- and west-facing windows receive low angle sunlight that is difficult to control and cause overheating and/or increased cooling loads. North-facing glass allows for reasonable daylighting without cooling penalties.

 Get window-to-wall glazing ratios right. The appropriate ratio is in the 20% to 35% range. The most typical wall daylighting solution uses long continuous horizontal bands of high windows, with smaller areas of view windows below. The upper windows typically have horizontal louvers or light shelves to reflect light deep into spaces. Lower windows can have separate blinds to allow for view while controlling glare.  Where there is too much glazing, use back-up solutions to minimize impacts. Special passive and active glazings and/or shading devices can help to offset the negative impacts of overglazing. Another recommended approach is separating glazing for daylighting and glazing for views. Case in point, Perkins + Will and Integral Group’s design for the San Francisco International Airport Central Administration Center, utilizes daylight redirecting film in a high clerestory zone of the windows serving as a daylight source to the offices. The lower vision zone of glass is shaded by

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DAYLIGHTING

IT’S THE ARCHITECT’S JOB TO CREATIVELY INCORPORATE MANUFACTURERS’ PRODUCT TECHNOLOGIES TO BEST OPTIMIZE THEIR PERFORMANCE. two horizontal exterior shades, sized and spaced to maximize views out while mitigating solar heat gain so the building can be cooled by radiant cooling, explains Andary. Bringing shading technologies into the mix of daylighting strategies, Steve Marino, manager technical services, Vitro Architectural Glass, Pittsburgh, explains that these designs typically focus on two façades to limit the amount of heat transmitted into a building, and to maximize the volume of daylighting in interior spaces. “One method involves an energy modeler siting the building in its exact location to determine the paths and critical angles of the sun, and incorporating this information in the design,” he explains.

“Another option is a shadow study. Architects use these to determine at which times throughout the year surrounding buildings will cast shadows on a building and how they will impact its lighting and temperature control demands.” Meanwhile, Blackford recommends programs such as LBNL Windows, which architects can use to evaluate the thermal and optical performance of the complete complex glazing solution. “This allows for an analysis of the shades all the way down. A true optimized solution is shades that are automated and integrated into a building management system.”

SHADING SYSTEM USES LATEST TECHNOLOGY

With its combination of a hembar activation manual override feature and power and communication via a single Cat5e/Cat6 cable, the Solarfective Teleshade DC Cassette System is an efficient and effective shading solution. The system integrates seamlessly with lighting controls and offers intrinsic commissioning capabilities, and is ideal for projects requiring low-voltage wiring for automated shades in spaces where shade pockets are not available.

While automation often comes with a larger upfront investment, Blackford states that it pays for itself in the long run allowing the shading system to operate at the highest efficiency for the space based upon ever-changing conditions throughout the day.

Proven Examples Pulling this all together, a few well-executed daylighting designs bear testimony to successful building team coordination and pooling of expertise. 26 

Legrand www.legrand.us CIRCLE 303 IN THE NEWS

Photos: Draper

NO ADMISSION A large glazed skylight is integrated with a highly engineered dynamic louver system to bring natural light into the Ottawa’s Canadian Parliament Building West Block to meet television broadcasting requirements that no direct sunlight enter the facility.

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OTTAWA

CORNELL RELEASES LATEST STUDY

A Cornell University study reports that access to daylight makes employees more productive. Commissioned by View Daylighting Glass, the study compared the productivity and health effects of workers sitting near and farther away from windows, in addition to the impacts of electrochromic glass windows. For employees near windows, 80% higher daylight satisfaction was reported. Key results for workers sitting near dynamic glass included an 84% drop in eyestrain, headaches and blurred vision, and a 2% increase in productivity.

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DAYLIGHTING

CASE STUDY

Channel Glass Defines Museum of the Bible  25

Take the Bullitt Center in Seattle. The fenestration system, together with high ceilings, enables the building to draw more than 80% of its lighting needs from the sun. As the first Living Building Challenge (LBC) certified project, daylighting goes deep into the floor plate with Vitro’s Solarban 60’s high visible light transmittance, and the curtainwall is equipped with manual and motor-controlled openings to facilitate passive cooling and natural ventilation, along with retractable external blinds to help block solar heat. Another LBC project, Pittsburgh’s Center for Sustainable Landscapes at Phipps Conservatory, combines passive low-e and ultra-clear glass with light shelving, overhangs and shading devices. Demonstrating synergies achieved with high-performance glazing and an innovative louver solution, Draper was involved in an interesting project for the Canadian Parliament Building in Ottawa. In converting the West Block to be used as the debating chamber, direct sunlight had to be consistently blocked for purposes of televising House of Commons proceedings. Consequently, in order to support the large glazed skylight throughout a multilayer roof structure, an innovative Draper team worked closely with façade engineers, the climate engineering company and the skylight contractor to engineer a dynamic louver system.

A 22 ½-ft.-tall channel glass façade beckons visitors to D.C.’s new Museum of the Bible and a channel glass a wall-cladding system defines the Museum’s entrance and Arcade.

A drive bar with sections of rack mounts at each louver location engage toothed wheels mounted on the louver shafts, explains Clint Childress, LEEP AP, solar control solutions product manager, Draper, Indianapolis. As the actuator drives forward and back, the louvers are rotated in order to shield the interior from direct sunlight while still enjoying the benefits of daylighting. “The system is programmed to move 60 times a day in three-degree increments with certain overrides.”

By selecting the glass’ crystalline appearance, SmithGroupJJR’s design hints at the building’s former use as an ice storage facility. “The translucent channel glass bridges the old building and the new museum,” reports David Greenbaum, FAIA, SmithGroupJJR, Washington.

“To the very specific project requirements, we developed 3D drawings of the design, and built working models to ensure everything would work as it should,” he continues. “We brought members of the team in to see the mockups, operate them and get a feel for how they would look and perform.”

WASHINGTON , DC

Clarissimo channel glass with a translucent white ceramic frit was specified. Light radiating from the Clarissimo glass surfaces bounces off the image-projecting ceiling. For the exterior, Bendheim’s 504 Rough Cast channel glass was installed in a SF-60 frame system.

TRANSLUCENT FACADE  Bendeim’s Clarissimo channel glass supports a welcoming 40-foot-tall main entrance to Washington D.C.’s new Museum of the Bible. The translucent channel glass façade brings in daylight while creating a sense of privacy. The light-diffusing textured glass channels creates a contrast with adjacent clear insulated glass units.

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DAYLIGHTING

CASE STUDY

ANZ STADIUM Sydney, Au.

Replacing its hail-damaged, yellowing skylight, ANZ Stadium—home to the 2,000 Sydney Olympic Games—is now sporting a new translucent polycarbonate roof.

OUT WITH THE OLD, IN WITH THE NEW TRANSLUCENT ROOF Sydney’s ANZ Stadium is now sporting a new translucent polycarbonate roof. 42,500 sq.-m. of hail- and sun-damaged panels were replaced for the 14-story-high, 300-meter-long stadium. BVN Architects specifi ed three different translucencies of 22%, 30% and 60%.

Through that process, the project team made a few revisions in order to make the design quieter, and allow for the maintenance of the louvers and actuators. “We then built the entire project in sections and assembled it in our factory before disassembling it for shipment, so we were sure the fit and the performance were right.”

“The bottom line is that by engaging different groups once the design parameters such as building location, orientation and other factors are established, you can leverage their knowledge to expand daylighting options and achieve optimal results that please all stakeholders and future occupants,” stresses Dritz.

Go Team

Part of this process should involve bringing an experienced and dedicated daylighting consultant onto the team, recommends Andary. “Good daylighting consultants think between disciplines, often filling technical gaps in architectural thinking, filling experiential gaps in engineered thinking, bringing rigorous evaluations to manufactured products and guiding holistic integration to contractors and subcontractors.”

As noted, these innovative daylighting designs could only be achieved with a high level or integrated design and coordination early in the project. And because the complexities of design and unique material performances, coupled with specialties in daylighting analysis, make it is difficult for any one person to be an expert on daylighting design, it takes a full team of experts to make it happen, explains Blackford.

Ultimately, effective daylighting is essential for creating healthy, productive and satisfying indoor environments, not to mention reducing energy consumption in order to reach net-zero goals. Consequently, it behooves project teams to efficiently work together to effectively deliver these complex, synergistic designs.

Projects like the well-designed Whitney Museum of American Art in New York City leverage newer daylighting design techniques to boost the benefits of natural light while protecting artifacts.

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“Specifically designed for ANZ Stadium with a slightly thicker top layer, the polycarbonate roof will ensure an increased life cycle and resistance to future hail storms,” relates Simon Davies, general manager of asset management, ANZ Stadium, Sydney. In place of the typical 0.6mm sheet, BVN Architects specified an extra thick outer layer of 2mm polycarbonate. The UV-coated sheets also shield stadium patrons from harmful UV rays and the hot Australian sun and rain.

IN THE NEWS

MUSEUM DAYLIGHTING WHITE PAPER

Cooper Robertson’s white paper, “Daylighting: Flexibility and Conservation,” focuses on balancing patron comfort and artifact preservation. These designs provide heavily filtered light through skylights or clerestories, mitigating the benefits of daylighting. Newer designs leverage techniques such as glazed surfaces on each façade, color neutral PVB UV filtration interlayers, adjustable interior shades and roof-mounted sensors.

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ENVELOPE

ALAN WEIS

| NZB: ENVELOPE |

A Blueprint for Greener Cities Speakers and exhibitors at AIA think big about ways that buildings can take cities to the next level of efficiency, with the venue itself serving as the perfect example. In today’s buildings, it has become crucial for architects to incorporate resiliency principles into their designs.

Alan Weis, a contributing writer for Architectural Products, covers thermal management issues, including building envelope and HVAC systems.

T

his year’s AIA Conference on Architecture just wrapped up at the Jacob Javits Center in New York. The theme was “Blueprint for Better Cities.” Not surprising, resiliency was a major theme, and the sustainability and resiliency of roofs, was right there at the top of the agenda, including the session “Resilient and Sustainable Design Implications of Urbanization on Low-Slope Roofing.” The increasing incidence of extreme weather events jeopardizes the complex and interdependent networks that come with urbanization whenever infrastructure damage occurs. It has become increasingly crucial for architects to incorporate resiliency principles into building design—starting with the appropriate low-slope roofing system. We need to be transforming roof assemblies so that they can store water during extreme precipitation events, produce power during power outages and go beyond currently accepted performance levels. In other words, today’s reflective membranes need to do more; they need to actively contribute to cooling.

ly and the tint of the all-glass façade was responsible for one of the highest annual numbers of bird collisions in the city. The problems were extensive enough to warrant its potential demolition and start anew with a larger facility elsewhere in the city. However, a plan was developed to expand the existing facility, bringing its design features and operational efficiency up to and exceeding contemporary standards. Renovation included reworking the entry plaza to create pedestrian-friendly landscaped urban space, an updated building enclosure with a new high-performance curtainwall and skylights, a 6.75-acre green roof and new, energy-efficient mechanical and electrical systems. During the renovation, a pre-engineered expansion building was constructed on the site’s northern end, allowing for the center to be fully operational.

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One way of tackling this issue is the installation of vegetated roofs. In fact, to get a lesson on how cities are making bigger and better plans in terms of energy efficiency via the building shell, conference attendees only had to look at the Javits Center itself—specifically the roof, which is a green blueprint of sorts. Built in 1986, the facility took a big step forward in 2014, thanks to a major renovation by FXCollaborative and Epstein. Despite its popularity, the facility was aging poorly, consumed vast amounts of energy and water, and produced vast amounts of waste unbecoming of a premier civic building. Its all-glass enclosure leaked constant-

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CASE STUDY

THE UNIVERSITY OF TENNESSEE AT CHATTANOOGA LIBRARY

Chattanooga, Tenn. The University of Tennessee at Chattanooga (UTC) Library, designed by Derthick, Henley, and Wilkerson Architects, is a five-story, LEED-certified facility, which offers an optimal and comfortable space for students to study with a state-ofthe-art studio, more than 200 desktop computers and 38 daylight-filled study rooms. Open space and nice views are in no shortage for this new construction on UTC’s campus, as it serves as a community gathering place for the student and faculty—thanks in part to EFCO’s 5600 Curtainwall, E-Shade and D300 Entrance Doors.

SPARKLING SILVER The new LEED silver-certified Javits Center is enclosed by a high-efficiency façade of pixelated, bird-friendly glazing. Upgrading the envelope to improve performance and control daylight was a design strategy.

LET THE LIGHT SHINE IN The use of transparent vision glass brings a high level of natural light into the building’s interior, contributing to a 25% energy use reduction.

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TOWARD THE FUTURE The library, designed by Derthick, Henley & Wilkerson Architects, is a model for collaborative research in the 21st century.

GREEN ROOF The green roof, seen from high above, prevents millions of gallon of storm water runoff per year.

The new LEED Silver Javits Center is now enclosed by a high-efficiency façade of pixelated, bird-friendly glazing and topped by the country’s second-largest green roof on a civic structure—which is now home to 17 bird species, five bat species and hundreds of thousands of honeybees. Th is green roof prevents approximately 6.8 million gallons of stormwater runoff per year while also improving the aesthetic value of urban open space, acting as the “fi fth façade” of the building, seen from

 THERMALLY EFFICIENT The thermal qualities of EFCO’s 5600 curtainwall systems provide an overall 27% gain in frame and glass U-factor and 10% improvement in CRF.

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NATURAL LIGHT The use of skylights in the building’s design contribute to the harvesting of abundant natural light.

THRIVING ECOSYSTEM Javits’ green roof, seen by adjacent high-rises, is home to 17 bird species and thousands of honeybees.

emerging adjacent high-rises (a tour of the roof was offered at the conference). The specially fritted glass of the curtainwall has reduced the number of bird deaths attributable to the building more than 90%. Through extensive analysis, the design focused on upgrading the existing envelope to improve performance and control daylight, effectively mitigate heat gain and harvest natural light while respecting the building’s original aesthetic. The use of transparent vision glass and skylights brings an exceptional level of natural light into the centers interior. This, in addition to overhauled mechanical, electrical, lighting and plumbing systems, has reduced energy use by more than a quarter when compared to the preexisting incarnation. The building has also exceeded New York State’s mandate of reducing energy and water consumption by 20% by the year 2020. 32 

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Net Zero Energy by 2020 This is our stated aim for our 100+ manufacturing facilities globally

The pursuit of Net Zero Energy is at the heart of what we aim to achieve, both for ourselves and for the built environment as a whole. Our array of products and solutions complete the building envelope and help architects, owners and occupants along their own NZE journeys. Within Kingspan, we aim to use only renewable sources of power through saving, generating and procuring.

A global drive which began in 2011 at 0% NZE has now pushed us to achieving 69% NZE in 2017.

Let’s journey together

www.kingspan.us

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CHICAGO BLACKHAWKS TRAINING FACILITY Chicago, Ill.

Designed by HOK, the Blackhawks have built a 125,000-sq.-ft. training facility and community center. On top of the building is 24,000 sq. ft of green roof systems to complement the structure’s 68,000-sq.ft. main roof. A 60-mil TPO system manufactured by Carlilse SynTec was specified for the upper roof assembly, and an American Hydrotech 4-in. garden roof assembly is housed on two lower sections of the roof. The lightweight system accounts for climate conditions and the building’s structural limitations, as it resides on a metal deck.

Case Study: Green Pedigree Of course, not every roofi ng decision will involve a vegetated roof. In fact, more traditional roofi ng products were on display on the expo floor, and many of them certainly offered green stories of their own. Case in point, was a project that came up for discussion at DaVinci Roofscapes. The project involved a 1932 bungalow-style 1,800-sq.-ft. beach home in South Salem, N.Y., which has racked up quite a green pedigree, being designated as an ENERGY STAR Certified Home, a LEED Platinum Certified Home and a Home Energy Rating System (HERS) Certified Home. The retrofitted house is topped with a polymer Bellaforté Slate Black roof, selected for its durability, aesthetic appeal and 50-year limited warranty. Available in 12-in. tile widths, the Bellaforté Slate and Shake tiles feature patented self-aligning features, including the leading edge tab and aligning ledge, which help reduce installation time. A square of Bellaforté tiles—with 100 pieces per square—weighs just 190 lbs. Because there are no asphalt particles or oil-based runoff from the tiles, collected rainwater from the roof stays at a high quality and is better suited for landscaping applications. 34 

SHAKE SHINGLE TRIFECTA A new collection of three composite shake shingle colors, the Nature Crafted Collection, includes realistic, nature-inspired colors, including Aged Cedar, Mossy Cedar and Black Oak. The idea of the collection is to capture the look of a moment and retain it for decades. Each tile has been crafted to resist fire and impact, along with high winds, mold, algae, fungus and insects. The composite tiles come in both wavy and straight grains throughout each shake tile to achieve an authentic wood look. DaVinci Roofscapes davinciroofscapes.com CIRCLE 301

HOUSE OF ACCOLADES Designated an Energy Star Certified Home, a LEED Platinum Certified Home and HERS Certified Home, the house is topped with a polymer Bellaforte Black roof.

The assembly consists of a hot-applied rubberized asphalt membrane, which is applied to the roofing substrate to form a monolithic coating. It is topped with a root barrier and Dow Styrofoam insulation. The system also incorporates Hydrotech’s Gardendrain GR15, a molded polyethylene panel designed to retain water, filter fabric, lightweight growing media and mature plants, which are installed in the form of the InstaGreen Sedum Carpet, a pre-grown mat that contains different types of sedum.

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SOUTH SALEM, NY

Because there are no asphalt particles or oil-based runoff from the roof, rainwater collected is maintained at a high quality better suited for landscaping applications.

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CASE STUDY

BOA TOWER AT ONE BRYANT PARK New York, NY

 LEARNING ACCESS The space allowed the district to partner with Tesla Motors and drive the Model S into the facility through the large glass wall’s opening. Students were able to learn about the car’s electric drive technology first-hand.

CASE STUDY

Designed by Cook + Fox Architects LLP, the 1,200-ft.-tall Bank of America Tower at One Bryant Park is located adjacent to the New York’s famed main public library. Its massing reflects a crystalline form, which tapers off at the top, and the entire building shines in the Manhattan skyline. The precise folds and facets are intriguing, especially

DARTMOUTH MIDDLE SCHOOL (STEM BUILDING)

San Jose, Cailf. SAN JOSE

A new science, technology, engineering and math (STEM) building at Dartmouth Middle School in San Jose got a boost in flexibility from NanaWall Systems in terms of both interior partitions and portions of the exterior walls. This gave teachers and students flexible instructional space while greatly improving natural light and allowing outside air to circulate throughout the building when the outer walls are open. NanaWall’s folding systems were ideal for the project because when closed, they offer acoustical buffering while

providing transparency, unlike traditional partition walls. The two SL45 systems—consisting of five panels each—have STC and Rw values of 36 for sound control and privacy, along with a surface mounted interior sill. Very little sound penetrates, which allows for learning opportunities both inside and outside of the closed-off classrooms. Two four-panel SL70 systems with low-profile saddle sills are used for

the outside openings, which feature insulated tempered glass and have STC and Rw sound ratings of 32. This gave the school’s teachers and students the added flexibility they were looking for, since the glass walls control noisy areas outside when simply closing the doors. They include an all-aluminum design that has a thermal barrier built in, which delivers a comfortable and quiet experience when closed.

The panels interlock to create a streamlined look and secure weather protection, and can fold off to the side completely out of the way. Swinging doors can be placed where needed to allow teachers and students to gain access to classroom spaces. In fact, this highly flexible division of space allowed the district to partner with Tesla Motors and drive a Model S into the facility through the glass wall’s opening.

Roof as Sponge As Boston’s long-anticipated 101 Seaport–a 17-story, 440,000-sq.-ft. office building–nears completion, it’s being topped off with 5,000 sq. ft of living roof that will reduce the need for on-site stormwater management systems. The soil in the green roof system, made by LiveRoof and designed by Copley Wolff Design Group, Landscape Architects and Planners, acts like a sponge and absorbs excess rainwater, thus reducing the impact of a new building on the municipal storm drainage system and surrounding watershed by reducing flooding and erosion.

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when the sun accents the building. The 2.1-million-sq.-ft. office tower is the first skyscraper designed to achieve a LEED Platinum rating and is billed as the greenest skyscraper in the country due to its many sustainable features, including a floor-to-ceiling, high-performance glass curtainwall using VE132M glass with custom silk-screen (V175) from Viracon. The 1-in. insulating glass has a visible light transmittance of 73% and a solar energy transmittance of 37%. The appealing design of this landmark building’s faceted crystal form lets daylight reach the street while capturing and refracting the changing angles of the sun.

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Glazing and Curtainwalls A notable session at the expo, “Understanding Everything About Fenestration Performance,” set the tone, focusing on standards, ratings, specs and testing procedures that contribute to the performance assessment of fenestration. This session highlighted standards required by window and door manufacturers, demonstrating how products are specified based on building performance requirements, the range of performance differences and the testing required to rate products and an in-depth look at design, energy and sound performance. Back on the show floor, there were a lot of great products reflecting these changes, including Halio’s electrochromic glazing. It looks like ordinary clear glass until it tints to cool shades

ADVANCEMENTS

KINESTRAL TECHNOLOGIES www.kinestral.com

Halio has a Solar Heat Gain Coefficient of 0.08 when tinted, and a UV factor of 0.24. In addition, it has a UV transmission of less than 1%.

of gray to block unwanted heat and deliver glare relief. It represents a major leap forward for electrochromic technology: In its clear state, it’s indistinguishable from conventional glass; it transitions uniformly to eliminate the iris and curtain effect and offers unlimited tint level options; and it achieves its darkest tint level within three minutes, regardless of glass size. By blocking solar heat gain and maximizing use of natural light, it can reduce a building’s energy consumption by up to 20% by decreasing lighting and HVAC usage. Halio has a Solar Heat Gain Coefficient of 0.08 when tinted, and a UV factor of 0.24. In addition, it has a UV transmission of less than 1%. Tinting begins within 15 seconds of receiving a command, and transitions occur within three minutes, regardless of the window size. Switching between clear and dark can be automated in response to the weather, time of day or the sun’s position. While it integrates with building management and home automation systems, facility managers and homeowners never cede control. All automation can be overridden using a number of manual control options: a mobile app, PC, wall-mounted tint selectors and even voice commands. Though the naked eye is likely to only discriminate between 10 tint levels, Halio technically features an unlimited number of tint levels between clear and dark. It also blocks 99.9% of ultraviolet rays.

ACCENTUATED BY BACON Bacon’s Architectural SunShades (BASS) are custom-extruded, finished and fully assembled aluminum exterior applied fixed sun shades. The slim, brise soleil horizontal exterior units offer designers and building owners truly efficient shading while providing building occupants a balance of daylighting and vision. Bacon’s Architectural Muntins (BAM) are custom-extruded, finished and fully assembled aluminum muntin grids. With three applied systems, BAMS offer the look of true divided lite muntins for new construction or existing buildings. The units are shipped fully assembled to the installer, ready for easy, quick installation over the exterior and interior of storefront and curtainwall openings. Bacon’s Architectural Muntins www.bamuntins.com

t SOLAR CONTROL By blocking solar heat gain and maximizing use of natural light, HALIO can reduce a building’s energy consumption by up to 20% by decreasing lighting and HVAC usage.

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E NVE LOPE

TOWERING ELLIPSOIDAL DESIGN As one of the first high-rises constructed in the fast-growing Tysons unincorporated area of Fairfax County, Va., Adaire, a mixed-use residential community, stands out not only for its 35 stories towering into the sky but for its striking ellipsoidal design and modern façade.

IN THE NEWS

Putting Birds First TYSONS, VA

CASE STUDY

Guardian Glass North America has published Environmental Product Declarations for flat glass and processed glass products manufactured at its seven North American plants. The company also has an updated Health Product Declaration, version 2.1, for flat and processed glass. The documents are in accordance with ISO 14025 and can help building projects earn up to two LEED v4 credits.

ADAIRE: APARTMENTS IN TYSONS CORNER Fairfax County, Va.

As one of the first high-rises constructed in the county, Adaire, a mixed-use residence, stands out for its striking ellipsoidal design and modern façade. A total of 113,160 sq. ft of Alucobond PLUS clads Adaire, including 32,134 sq. ft of Custom Liberty White; 37,538 sq. ft of Custom MCH Gray Mica; and

43,488 sq. ft of Custom River Satin Nickel. Alucobond PLUS consists of two sheets of 0.020-in. aluminum thermobonded to a proprietary fire-resistant core and is manufactured in a standard 4-mm thickness. It provides extraordinary flatness and rigidity, excellent formability, low weight and outstanding weather resistance.

Aluminum Aesthetics No curtainwall discussion would be complete without a look at materials, notably aluminum, which at the show was addressed in the “Aesthetics, Durability, and Sustainability of Extruded Aluminum Trim,” session. Specifying extruded aluminum trim for use with various siding materials can help designers meet both aesthetic vision and sustainability goals. Th is session explored moisture management strategies for extruded aluminum trim and various siding materials, as well as the many profi le and fi nish trim options currently available. It helps to see it in action. On hand at Alucobond USA, was a case study of a cool project they were involved in: the Adaire, a mixed-use

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The recently completed 111 Murray Street is one of dozens of distinctive buildings in New York City inspiring glass possibilities with Guardian SunGuard glass.

residential tower was one of the fi rst high-rises constructed in the fast-growing Tysons Corner unincorporated area of Fairfax, Va. It stands out not only for its 35 stories but for its striking ellipsoidal design and modern facade. The tower’s unique oval design is accentuated with sweeping white balconies and a façade of glass mixed with multiple custom colors of Alucobond PLUS aluminum composite material by 3A Composites USA, installed in a random pattern. The panel system is accentuated with floor-to-ceiling windows. Be sure to check back in September; we’ll feature highlights from AIA, as well as a teaser of what to check out for this year’s Greenbuild.

The flat glass EPD from Guardian Glass covers unprocessed products such as Guardian UltraClear low-iron glass, clear and tinted glass. The processed glass EPD covers coated, heat-treated and/or textured products from the Guardian SunGuard and ClimaGuard exterior glass product lines, and interior glass products such as ShowerGuard coated glass. Each EPD contains a full list of the products it covers. Guardian’s development of these documents included review and approval from UL Environment.

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LIGHTING

KEVIN WILLMORTH

| NZB: LIGHTING |

Looking Beyond (lm/W) Efficacy Lumens per watt—the industry lighting measurement standard—is not an accurate determinant of a product’s performance in delivering the desired amount of light on a targeted surface. Other factors must be considered in selecting appropriate luminaires for a specific illumination purpose.

Kevin Willmorth is a lighting professional who has emphasized lighting conservation for more then 30 years. He helped create Architectural SSL magazine and remains its editor. He is also the owner of Lumenique, a consultancy focused on deploying SSL products.

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id you know that lumens per watt (lm/W) is only applicable when comparing two luminaires with identical optical distribution? This is frequently overlooked by decision makers, and exploited by marketers who promote products with a non-sequitur comparison that more often actually delivers lower illumination levels, and higher energy consumption. Unquestionably, lm/W has become ubiquitous in the discussion of luminaire evaluation, but it fails to accurately represent differences in actual product performance in application. The relationship between raw light output and how many watts it consumes appears intuitive in selecting a product that delivers the most light for the least amount of power. Unfortunately, this is overly simplistic. In application, lm/W is not an accurate determinant of a product’s performance in delivering the desired amount of light onto target surfaces (floor, task surfaces, walls, etc.). To understand why this is the case, one must understand what lumens represent, and what other factors are more important in selecting appropriate luminaires for a specific illumination purpose. For the record, lumens describe the total amount of light potential emitted by a luminaire. This is the gross total value that provides no indication of directionality or control of the light emitted, or whether it will ever actually reach a target surface at all. For example, if a luminaire that emits 100% of its light toward the ceiling, and the ceiling is painted black, the amount of light that will reach the floor below will be very small. If that same luminaire is inverted to direct its light downward, the resulting illuminance is significantly increased. Yet, the efficacy of the luminaire remains unchanged, as its raw lumen output and energy consumption give no indication of its suitability to illuminate a given surface.

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A more revealing metric for lighting application, when comparing products in general, is luminaire efficiency within a desired beam pattern. This includes both beam efficiency— the main pattern determined by the angle at which the edge of the beam is 50% as intense as the highest intensity within the luminaires light pattern—and a secondary metric called field efficiency—which is determined as the area defined by the angle at which the light intensity is 10% of the highest intensity within the light pattern. The higher the efficiency a luminaire produces within its beam angle, the more light it will deliver onto target surfaces. If the beam efficiency is lower than the field efficiency, the pattern will be less distinct, with more light being directed beyond the desired light pattern, creating a softer overall effect.

38 

 Lumens per watt has become ubiquitous in the discussion of luminaire evaluation, but it

fails to accurately represent differences in product performance in application.

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Intelligent Wireless Lighting Control System IntelliMax is the simple way to meet building codes and save energy. Powered by CortetTM wireless technology, IntelliMax works seamlessly with MaxLite LED luminaires to deliver scalable energy cost savings for facilities of all sizes. • Simple installation and commissioning • Proven, Zigbee® mesh protocol • Scalable from single room to entire building

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1993

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LIGHTING

IT’S GENERALLY DESIRABLE TO SEE BEAM DISTRIBUTION INTENSITY OF LIGHT AT ANGLES ABOVE 45 DEGREES NO MORE THAN 10% OF THE HIGHEST INTENSITY WITHIN THE BEAM PATTERN.

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ID SERIES CYLINDER The ID+ 3.5 in. and 4.5 in. cylinder series, companion pieces to ID+ downlights, offer a one-piece, die-cast reflector with a knife edge and a decorative reveal with a dual purpose: it serves as a heat vent, while also enhancing the fixture’s aesthetic. It features a 50° cut-off for brightness control and visual comfort.

However, another potential problem with greater field distribution, is the potential for glare from light emitted at high angles, visible to occupants directly. For this reason, it is generally desirable to see beam distribution intensity of light at angles above 45 degrees no more than 10% of the highest intensity within the beam pattern. This produces the greatest performance in illuminating target surfaces, with the least amount of undesirable brightness effects. None of this is represented by lm/W. In many cases, optical control may create a lower lm/W value, while generating higher illuminance where it is desired—with less glare and brightness. This does not mean that lm/W values are irrelevant. When comparing two products with the same beam pattern characteristics, and comparable luminous performance overall—effective illuminance delivered onto a target surface—comparisons of product efficacy reveal how well products perform relative to converting electrical energy

Focal Point www.focalpointlights.com CIRCLE 300

into the desired illumination result. For example, if two luminaires of identical optical performance are compared, it can be assumed that the gross lumens required to attain that result are also similar. If one utilizes 32W of energy, and the other 38W, the luminaire consuming the greater power will generate the lowest lm/W efficacy value, which would be less desirable. However, this only applies to comparison of products with nearly identical optical distributions. When there are great differences between light patterns and beam efficiencies, the comparison of efficacy becomes a non-sequitur, as the resulting illumination effects will not be shared. A common trick in product marketing and design is to create an impression of high performance through high lm/W efficacy statements by manipulating a

CASE STUDY

MEDALLIA OFFICES San Mateo, Calif.

Among a number of growing high-tech companies in the San Francisco region, the design firm of M Moser, for Medallia’s office, treated this 210,000-sq.-ft. workspace as an exercise in urban planning applied to an interior. To support the culture of collaboration, Moser’s floor plans were based on flexible work areas, movable walls, and meeting rooms designed as a kit of parts. Overhead lighting schemes supply illumination for individual/collective activities. Within suspended wood grids are white canister fixtures, along with multiple adjustable black fixtures. Other areas feature exposed tube lamps and a chandelier that introduces an informal style to identify areas.

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Five repeated, pre-fabricated room types made up of movable walls, and meeting rooms that were designed as a kit of parts, make up the floor plan.

BE VERSATILE Exposed tube lamps, as well as black or white cylinders within wood grids, provide overhead lighting schemes for individual and collective activities.

BEAM PRECISION The compact LED’s beam options include 20º, 30º or 40º beam angles.

APEX SERIES Delivering a targeted beam of high-performance, lowglare illumination precisely where needed, the DRD2X merges advanced reflective optics with robust LEDs and an integrated driver to deliver strong center beam candlepower. Company www.website.com CIRCLE 299

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LIGHTING

IN THE NEWS

POE Advancing IN THE CLOUDS Ceiling anchor bolts and stainless-steel aircraft cable suspend the unique fixtures along the length of the lobby.

CASE STUDY

NICKLAUS CHILDREN’S HOSPITAL Miami, Fla.

Healthcare specialists Perkins+Will have been responsible for medical facilities worldwide, including the 213,000-sq.-

ft. Advanced Pediatric Care Pavilion on the campus of the hospital, made possible by a generous donation from the Golden Bear. In the lobby, daylighting and LED-illuminated overhead fixtures combine to cre-

photometric design to sacrifice glare control and beam efficiency to realize the highest possible lm/W value. The result are products that produce glare that deliver poor illuminance on target surfaces. To avoid being fooled by this strategy, look deeper into how the product distributes light. Careful selection of luminaires, based on illuminance delivered and photometric efficiency first— regardless of lm/W metric references—is the key to realizing true applied design efficiency.

ate a welcoming space that is bright and open. The 65 custom elliptical “glow rings” measure six, eight, 10 and 12 ft. in diameter. Toronto-based Eventscape collaborated with P+W on the details. For each fixture, an

aluminum strut channel frame was stretch formed, welded to scale, and finished with white powder-coating. Acrylic lens diffusers were press fit. LED lights were then attached to the frame’s inside channel.

ADVANCEMENT

Tapping into Big Data Via Lighting

LISTEN UP Combining acoustic and luminous efficiency, “Eggboard” is available in color temperatures of 3000K or 4000K. Crafted of sound-absorbing PET, these active “faces” operate at the top and bottom

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to minimize sound reflections. The curved sinusoid layer encloses multiple low-voltage LEDs. Artemide www.artemide.net/en/ CIRCLE 298

From a company promoting real-time monitoring and management of people, places, things and energy, Flow Lighting offers a series of “snap in,” one-piece, secure wireless LED troffers with integrated sensors, controls and logic to collect, analyze and utilize Big Data. Flow estimates the fixtures can lead to a 50% reduction in energy costs.

DATA DRIVEN Sensors help deliver data on occupancy, space utilization and real-time energy/ savings.

Philips Lighting and TDC Erhverv, Denmark’s largest supplier of integrated IT and communication technologies, have installed the first Power-over-Ethernet (POE) connected lighting system in the Nordics, using Cisco network technology. The system, in newly built offices of Copenhagen’s Albertslund Municipality, gives its building managers atypical insights into energy use and space utilization, while enabling staff to personalize their lighting using an app. The office features a Philips POE-connected lighting system with occupancy sensors integrated with Philips SmartBalance and PowerBalance luminaires. Approximately400 fixtures are connected to Cisco’s networking technology and powered by the small electric charge carried over Ethernet cables, which also route data acquired by the sensors to the building’s management system. Albertslund Municipality foresees the system as a paradigm shift in public digital management and service. “The municipality expects that the results will be promising enough to broaden the use of such tech to other municipality buildings-with the initial focus on buildings used for administration, healthcare and learning,” said Niels Carsten Bluhme, Director of City, Environment, Culture & Employment.

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WATER

JOHN MESENBRINK

| NZB: WATER |

Piloting Net-Zero Water An off-campus house on Purdue’s campus is a testing ground for net-zero concepts as student engineers—and national research teams—are using the living laboratory for a better understanding of energy and water efficiency, which, hopefully, will enable more sustainable lifestyles.

John Mesenbrink has been covering the building and construction industry for more than 15 years, focusing his efforts on the plumbing and HVAC industries—including the launch of his website, which focuses on the installation side of mechanical systems.

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here’s a house on Purdue University’s West Lafayette campus that has been a test bed for net-zero energy and water for the past few years. The ReNEWW House—Retrofitted Net-Zero Energy Water and Waste—is an off-campus house or “living lab” where Whirlpool Corporation engineers complete their Masters degrees and research on new products and technologies, which will enable more sustainable lifestyles. More recently, members of a research team from of Purdue University, Michigan State University, San Jose State University and Tulane University are using RENEWW House data as part of its “Building Plumbing Safety: Right Sizing Tomorrow’s Water Systems for Efficiency, Sustainability and Public Health” report where the team began drinking water sampling. Water samples were collected for initial microbiological characterizations, and these results have helped the team understand potential ranges for methods used to calibrate the upcoming full-scale water testing effort. The pilot facility has begun construction to include the installation of floor drains.

State University, the comprehensive Building Plumbing Safety report made recommendations for the need for better understanding water in buildings and obtaining actionable data: better flow measurements, modeling and diagnostics in building plumbing; sensors/data acquisition equipment; when water stagnation becomes a hazard and what exposure routes from a chemical or microbiological exposure risk perspective are important; and the need for water quality linked to water usage conditions in buildings.

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The report’s overall objectives were to improve the public’s understanding of decreased flow, elucidate factors and their interactions that affect drinking water quality through transport stimulation models for residential and commercial buildings and create a risk-based decision support tool to help guide decision makers through the identification of premise plumbing characteristics, operations and maintenance practices that minimizes health risks to building inhabitants. According to Juneseok Lee, California Water Service Co. Chair Professor & Associate Professor Civil and Environmental Engineering, San Jose

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7/2/18 10:36


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6/29/18 5:09 PM


WATER WEST LAFAYETTE, IND.

IN THE NEWS

Fighting the Good Fight RENEWW HOUSE, WEST LAFAYETTE, IND.

With more than more than 100 PHCC contractors, state and local chapter executives, and p-h-c industry partners descending on Capitol Hill recently for the Plumbing Heating Cooling Contractors (PHCC) Legislative Conference, the message is quite clear: the future starts now. PHCC National President Laurie Crigler set the tone for the event prior to meetings on Capitol Hill, as p-h-c industry partners delivered a unified message to members of Congress about ongoing challenges that will have a long-term impact on the p-h-c industry and the country. Moreover, PHCC continues to educate members of congress of the tremendous opportunities within the plumbing and HVAC trades. PHCC members also advocated for increased water system infrastructure spending, and career and technical education, while thanking congressional members for recently passed tax reform. PHCC also expressed support for workforce development though reauthorization of the Water Infrastructure Finance and Innovation Act (WIFIA). Members of Congress are aware of the country’s infrastructure problems, and they are not taking for granted the shape of the water systems in this country. “Flint was a wake-up call,” said Mark Riso, Vice President of Legislative Affairs, PHCC.

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RESIDENTIAL WATER USE The average person in the U.S. uses 91 gallons of water/day, which translates into roughly $1000/ American family/year. The water systems at the ReNEWW house, which include rainwater, graywater and metering, contribute to better water efficiency.

In phase 2 of the ReNEWW retrofit, the outdated fixtures and appliances were replaced with water-efficient Kohler fixtures and Whirlpool appliances. Rainwater harvesting and filtration was installed onsite for all potable water applications. In an effort to offset potable water usage for toilet flushing, a CleanBlu Graywater treatment system was installed onsite. Residents of the house have been consuming roughly 21 gallons/person/day. A 75% reduction in water usage.

water recycling and energy-efficient systems, designed for the home by Clean Blu. Whirlpool worked with Kohler, which equipped the house with water efficient toilets, faucets and showers. During this second phase, a new suite of energy and water-efficient Whirlpool brand appliances were also incorporated.  40

Inside the House The components installed in the house were split up in multiple phases. The first phase, completed at the end of 2015, focused on energy capture and retrofitting the home to include systems and materials. Subsequent improvements focus on water-saving renovations, including a graywater system that uses reclaimed water from sinks and showers. The second phase of the project focused on updating the house’s water systems to achieve the goal of net-zero water. The team installed a rainwater system, designed by Design-Aire Engineering (DAE), that captures rainwater from the roof and an interior system that filters water for drinking water usage; and implemented water reuse systems, including shower-to-toilet gray-

“Whirlpool had begun the net-zero energy phase and they were interested in partnering with us on the net-zero water phase, so we worked with our internal team to create a proposal to renovate the home with all Kohler products and determine the parameters for gathering data and setting measurement criteria,” said Carl Schroeder, senior new product development program manager, Kohler. Initially, Whirlpool’s concept was a demonstration house, showing the potential to convert an old house to a net-zero footprint, which has been rarely done as most net-zero houses are new construction. In the energy phase Whirlpool had outfitted the house with sensors to collect data on energy use/efficiency.

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WATER

CASE STUDY

CENTURY PLAZA TOWERS AT CENTURY PARK Los Angeles, Calif.

 HYBRID FLUSH Sloan hybrid urinals were used for the men’s rooms on each of the 88 floors and a half gallon of water was saved on nearly every flush with UPPERCUT Flushometers. This let users push the handle down for a 1.6-gallon solid waste flush and up for a 1.1-gallon liquid waste flush. Also, water use in every restroom sink was reduced by 67% with the aerators in Sloan BASYS faucets.

HIGH SUSTAINABILITY When the owners decided to upgrade the building’s core public restrooms, architect Aref & Assocs. Design Studio was able to spec more water-efficient fixtures.

“We proposed outfitting the home with temperature and flow sensors to monitor use patterns and thus better understand how resident behavior impacts water consumption in combination with products designed to use less water,” said Schroeder. Moreover, engineers installed an instrumentation system that monitors key data and employs the data collected to help develop next-generation, high-efficiency appliances in conjunction with Purdue University. Kohler products for the house were chosen based on water-saving potential and designs that fit well with the Craftsman style of the home. “The first-floor bathroom, with the Poplin Vanity and Memoirs faucets, uses a neutral color palette accented with oil-rubbed bronze accessories, which complements the home’s original woodwork. The second floor bathroom includes the Jacquard Vanity and Archer faucets with neutral white and grays,” said Stephanie Marshall, senior project designer, Kohler.

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The data shows the home’s water usage has significantly decreased after the installation of Kohler water-saving fixtures and Whirlpool appliances, from 103 to 34 gallons per day. The reduction includes 70% less toileting water, 50% less showering water, 63% reduction in laundry water, and 18% less kitchen use. The upstairs bathroom is the largest area of water consumption.

MIXING VALVE The 6000 Series LEGIOMIX electronic mixing valve has data logging, alarming, temperature indication and schedule-driven thermal disinfection programs for protection against Legionella. Each model number comes complete with valve, actuator, mixed and return sensors, mixed temperature gauge and controller for a complete ready-toinstall package. Standard onboard Modbus communication and an optional Modbus-to-BACnet gateway allow the controller to easily communicate to building automation systems.

Since the ReNEWW House focuses on three aspects: net-zero energy, net-zero water and net zero waste, success in each area depends on proper collection, storage, consumption and reuse. In addition, a drainline heat recovery system was added to recover waste energy from the shower drain and use it to heat incoming cold water. Each shower has a drainline heat recovery system. In an older house like the ReNEWW house, the challenge was finding adequate space under the shower for a properly sized system to make the energy recovered worth the investment. To make the ReNEWW House “net-zero water,” all plumbing fixtures were changed to highefficiency Kohler fixtures, all appliances were

The renovations include water-saving upgrades to the public restrooms on all 88 floors, of the two buildings. When California faces prolonged droughts, making water sustainability a priority is just common sense. The design called for the Century Plaza Towers to make the facility’s landscaping 100% self-reliant, with three 10,000-gallon tanks that store groundwater recovered from the subterranean parking garage. These and other measures combine to save the Towers more than 21.2 million gallons of water annually.

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WATER

CASE STUDY

LOT42 GLOBAL FLEX CAMPUS Kitchener, Ontario, Canada

The result of a multi-million dollar transformation of an old industrial site originally developed for Ardelt Industries of Canada in 1955, the LOT42 event complex blends the area’s manufacturing heritage with modern style. To meet the City of Kitchener’s stormwater control regulations, the project incorporated several elements of green infrastructure, including a 1,000-sq.-ft. French drain and a total of 12,400 sq. ft. of permeable pavement, installed with Porous Pave.

“Porous Pave was good choice for permeable paving. It is not only permeable, its recycled rubber content makes it a green material,” said Patrick Doyle, managing partner, LOT42. “It was more cost-effective for us than concrete permeable pavers or porous concrete because the installation required much less extensive excavation and base preparation.” “With 27% void space, Porous Pave can infiltrate 5,800 gallons of stormwater per hour per square down into the underlying aggregate base,” said Jim Roth, president, Porous Pave Ontario. “It can endure freeze-thaw cycles, frost and ground movement without heaving and cracking, an important advantage with our winter weather in Ontario.”

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 PERMEABILITY LOT42 Global Flex Campus, a 17-acre global flex campus dedicated to arts, technology, manufacturing, athletics and community events, installed 12,400 sq. ft. of permeable pavement using Porous Pave XL.

Porous Pave Ontario, Porous Pave XL is a highly porous, pour-in-place permeable paving material made from 50% recycled rubber chips and 50% kiln-dried aggregate mixed on site with a liquid binder. KITCHENER, ONTARIO

 43

switched to high-efficiency Whirlpool appliances, and two water collection and treatment systems were installed: one for rainwater, and one for graywater. Rainwater is collected from the solar panels, stored, treated, and pumped into the home’s plumbing system. The solar panels installed are designed to melt snow and supply water to the house. This was a challenge to “net-zero energy” in that electrical energy is required to melt the snow to produce water. Rainwater is stored in tanks underground, so the team needed to find a location for these tanks next to the home. Graywater is collected from showers, treated, and pumped to the toilets. There are technical challenges associated with treating and using graywater. Kohler toilets are warranted to use graywater as long as it meets NSF 350 third-party performance standards for small onsite graywater systems.

As with net-zero energy, the local climate plays a huge role in net-zero water. The ReNEWW House is considered “net-zero water” over the course of a full year, meaning that all water used in the home is either captured onsite or treated and reused. Wastewater is, however, still being discharged to the municipal sewer. “We recognize that to further extend the benefits of water-efficient fixtures and faucets while maintaining optimum performance, we need to look at home water consumption holistically,” said Rob Zimmerman, Kohler Sustainability Senior Channel Manager. “We hope that by combining our engineering resources with those of Whirlpool’s to understand the technical challenges of creating a ‘net-zero water’ house, we can develop new insights for designing home plumbing, water storage and treatment systems that further reduce water use and better protect our water supplies.”

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WATER

PUMP AWAY High performance Design Envelope End-Suction pumps in the 1 to 10 hp range reflect a new design featuring improved hydraulics and Armstrong intelligent motor technology. Offerings also feature unique vibration isolation technology, which can reduce installed costs by as much as $2000 by eliminating the need to add an inertia base on installation. Armstrong Fluid Technology www.armstrongfluidtechnology.com CIRCLE 296

“WE RECOGNIZE THAT TO FURTHER EXTEND THE BENEFITS OF WATER-EFFICIENT FIXTURES AND FAUCETS WHILE MAINTAINING OPTIMUM PERFORMANCE, WE NEED TO LOOK AT HOME WATER CONSUMPTION HOLISTICALLY.”

CASE STUDY

REDMOND ELEMENTARY SCHOOL Redmond, Wash.

As part of Lake Washington School District’s new Redmond Elementary School project, Oldcastle Precast Auburn was contracted to supply precast concrete panel sections for two massive detention vaults for the school’s new stormwater conveyance system.

by 178-ft.-long by various-height and the south vault, scheduled for installation in November of last year, was 44-ft.-wide by 220-ft.long by 8-ft.-tall. In addition, Oldcastle Precast furnished ladders, cast iron covers, risers, grates and covers.

BNBuilders Construction, BLRB Architects, AHBL Engineering and Oldcastle Precast Auburn collaborated in the creation of the new stormwater conveyance system in order to meet the requirements set by the Washington’s Department of Ecology.

The segmented precast stormwater vaults hold approximately 900,000 gallons of water, allowing sediment to settle, causing filtered “clean” water to be discharged to the storm drainage system. Each precast panel was sealed using hydrophobic sealer. As soon as water touches the hydrophobic sealer, the water triggers it to spread, harden and cure between the panels, so there is no seepage. The overall construction of the precast concrete panel vault took six days.

Oldcastle Precast Auburn provided 274 precast pieces, including flat base slabs, top slabs, and wall panels. Built between August 14-22, 2017, the north detention vault measured 44-ft.-wide

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HVAC

JOHN MESENBRINK

| NZB: HVAC |

Rocky Mountain High (Innovation) The state of Colorado—more specifically the greater Denver area—is tipping the sustainability scales. With projects highlighting progressive HVAC methods that include heat recovery, geothermal and passive cooling, the Centennial State is moving toward more high-performance buildings.

John Mesenbrink has been covering the building and construction industry for more than 15 years, focusing his efforts on the plumbing and HVAC industries— including the launch of his website, which focuses on the installation side of mechanical systems.

c

ommitted to advancing both renewable energy technology deployment and energy efficiency at-large, the state of Colorado has in many ways been a pioneer in the widespread adoption of energy-saving solutions. Colorado has maintained its leadership in green building, and constantly striving to do more to reduce carbon emissions. Such notable projects that are contributing towards Colorado’s sustainability goals are NREL’s (National Renewable Energy Laboratory) Research Support Facility (RSF) and the National Western Center (NWC). A former AIA COTE Top Ten award winner, the $64 million, 222,000-sq.-ft,. RSF, recognized as a showcase for energy efficiency and renewable energy technologies, was designed so that its occupants—who conduct research—consume only the amount of energy generated by the renewable power on and near the building.

sink for reject heat from the data center, dramatically lowering the cooling load of the data center year round. “In designing and building the facility, the aim was to move the needle in how America uses energy to heat and cool buildings,” NREL Senior Engineer Paul Torcellini says. “It isn’t enough to be energy-efficient when commercially viable technology exists to make buildings energy-neutral.” For instance, RSF implements a more sustainable way of designing and constructing commercial spaces with its thermally activated building system concept, or TABS. A TABS structure uses its mass to absorb or emit heat through its conditioned surfaces to regulate

48 

Thermal comfort is addressed using an integrated system of thermal mass, radiant slabs, night purging and natural ventilation. Heating in particular takes a whole-systems approach to energy conservation. Among the distinctive project attributes designed in the RSF is an underground labyrinth thermal storage system developed to capture and reintroduce recovered heat, onsite solar energy generation strategies, a high-performance building envelope and an array of integrated passive heating and cooling systems incorporated in ceilings, flooring and wall systems. The building’s large thermal labyrinth under the two main office wings can store heat from the transpired solar collectors located on the south building facades. This heat is used to passively temper the ventilation air during the heating season. The labyrinth also serves as a thermal

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Colorado is one state that is leading the charge as it relates to high-performance buildings by advancing renewable technology, energy efficiency and energy-saving solutions.

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HVAC

SIDEBAR

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NWC Campus Sustainability Key components of the National Western Center Campus Energy Concept:

Many of the integrated passive design strategies, such as daylighting and natural ventilation, strongly support both energy performance and human performance. The form of the building is driven by energy, with its long and narrow office wings connected by a central spine, forming an “H” shape.

 Central utility building

housing a wastewater heat recovery system  Campus wide piping loop with ambient-temperature water  High efficiency electric heat pumps in each building utilized for both heating and cooling  Conventional built-up air handling units with some radiant floor heating  Solar PV located on each building rooftop  Biofuel generators (gensets) used for campus load management, demand response, and resiliency

CASE STUDY

Another project adhering to sustainability and net-zero ambitions, the National Western Center, which represents a transformation of the National Western Complex and Denver Coliseum sites into a year-round destination—enhancing these current Denver landmarks for the next 100 years—has

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Though the buildings have not been constructed yet, this is one rendering of the new National Western Center.

set a long-term goal of becoming a net-zero energy campus. Technical studies done in partnership with Xcel Energy and National Renewable Energy Lab revealed that it would be difficult to meet this goal using traditional HVAC systems, and that it would be more successful at reaching net-zero energy with a district energy system. “The City and County of Denver learned of projects that had successfully utilized thermal energy in wastewater to heat and cool buildings,” says Brian Morandi, corporate communications, global public relations, CH2M, now Jacobs.

NWC HAS SET A LONG-TIME GOAL OF BECOMING A NET-ZERO CAMPUS; THE GOALS ARE PART OF A BROADER CAMPUS REGENERATIVE DESIGN, WHERE THE CAMPUS IS FOSTERING SUSTAINABLE SYSTEMS.  LANDMARK GEO Beyond serving as an example for achieving notable government overhead cost reductions, the project speaks to the viability of geothermal energy as a retrofit solution in landmark and historic buildings, even those located in dense urban settings.

COLORADO STATE CAPITOL BUILDING Denver, Co.

Since coming online in the summer of 2013, the new geothermal heat pump system at the Colorado State Capitol Building has generated substantial savings for the state of Colorado. In the first year of operation, $95,000 in utility bill savings were achieved, and savings are estimated to increase at about a 3-percent annual uptick to $165,000 per year by 2029. Payback on the state’s investment in the Colorado Capitol Complex project at-large is estimated to be 19 years, with a return on investment for the State Capitol building’s geothermal system itself calculated at 10 years.

the interior. Two key features typically characterize TABS structures are high-performance enclosures; and a reliance on concrete slabs embedded with hydronic tubing for low-temperature radiant heating—emitting energy—and high-temperature radiant cooling—absorbing energy.

CLEAN ENERGY  By tapping into the steady temperatures below the earth’s surface, the building is able to heat and cool itself with a clean source of renewable energy.

 RECYCLED WATER The geothermal system pumps water drawn from the underground aquifer, piping it through a heat exchanger and then returning it back to the aquifer.

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HVAC

CASE STUDY

NREL RSF Golden, Colo.

The Research Support Facility on the National Renewal Energy Laboratory campus in Golden creates a new model and standard for energy efficiency in commercial buildings.

RESEARCH

MILES OF TUBING A crew of five people spent three months at mechanical contractor Trautman & Shreve prefabbing 42 miles of Uponor PEX tubing into bundles for each zone.

A high-performance building envelope, combined with an array of integrated radiant heating and cooling systems, contribute to the building’s overall passive HVAC.

Uponor tubing lines that supply heating and cooling to the building converge at a series of Uponor manifolds. 

Building a low-carbon campus is one of the many ways the National Western Center is seeking to pioneer innovative sustainability strategies. The Campus Energy Concept focuses on tapping into renewable resources that are available on-site. The district energy—thermal—system in the National Western Center’s Campus Energy Concept is over four times more efficient at heating buildings than using natural gas. Also, it results in 100% electrification of the campus—outside of a few cooking and laboratory uses)—which allows for use of 100% renewable energy to power the campus. This, in turn, facilitates achievement of the net-zero energy goal. Once the campus is fully functioning, it will be a living laboratory for energy innovation and a model of resource balance for other cities to follow. The solutions and technologies that make

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Big Data, Actionable Insight 

Recent studies indicate that most offices are underutilized by as much as half of their actual capacity due to shifting work schedules, mobile technology usage and changing business needs. This can lead to overpaying for unused space, wasted energy usage and

up the concept may be replicated in other areas of the country to enable net zero development. “We hope people will come to the NWC to learn about the building systems and renewable energy systems deployed and to research clean energy solutions,” says Morandi. This wastewater heat recovery approach uses proven and safe technologies that have been widely implemented in Canada and Europe but not yet in the U.S., especially at this scale, says Morandi. The NWC happens to have two large wastewater pipes, called the “Delgany Interceptor,” on the west side of the campus carrying most of Denver’s wastewater to the treatment plant. Coincidentally, the Delgany Interceptor pipes also run above-ground/at grade along the South Platte River in a location that was slated in the NWC

50 

off-temperature spaces that negatively impact the bottom line. Honeywell has introduced Honeywell Vector Space Sense, a software solution that shows where, when and how building spaces are used at any given point in time. As a result, the building operations team can make better-informed real estate and space usage decisions that provide opportunities to optimize costs and promote better user experiences.

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HVAC

 49

CASE STUDY

JOHNSON COUNTY COMMUNITY COLLEGE: GALILEO’S PAVILION Overland Park, Kansas

Master Plan to become new, publicly accessible open space. The city commissioned a study and worked closely with Metro Wastewater to determine both the feasibility of relocating the aboveground pipes and the feasibility of implementing a district energy system using wastewater pipes. The city then issued a Request for Information to determine whether market interest exists for a vested Campus Energy Partner to design, build, finance, operate and maintain a district energy system and be reimbursed for the up-front capital costs and the operating expenses.

In 2009, the Johnson County Community College (JCCC) formed the Center for Sustainability to promote an environmental and social responsibility. The team at JCCC learned of Studio 804, Inc., a not-for-profit in Lawrence, Kansas.

The market indicated tremendous interest and validated thinking around district energy and wastewater heat recovery as being critical to the formula of achieving net zero energy at the NWC. Through a competitive process, the city hired CH2M to develop a single Campus Energy Concept for the purposes of procurement.

When it came to selecting an HVAC system, said Dan Rockhill, professor of architecture at KU and the founder and executive director of Studio 804, “We basically had three distinctly separate spaces. Although they’re in the same building, the loading on them is different. So that resulted in us needing three separate air-conditioning and heating solutions.”

Since NWC is at the concept/procurement stage, says Morandi, the equipment specs have not yet been developed. Electric heat pumps that transfer

heat to and from the district ambient loop are the key enablers of the campus energy efficiency and 100% electrification of the HVAC systems. The district ambient loop is warmer than the outside air in the winter and cooler than outside air in the summer, allowing the heat pumps to operate at improved efficiencies when compared to combustion-based heating systems, or stand-alone building based air cooled heat pump systems. There is also an additional benefit in that the heat pumps do not require a cooling tower, thus eliminating water use by the HVAC system, which is typically the large water consumer in a building. The other HVAC systems used are traditionally built up air handler units with water coils, exhaust fans and overhead ceiling fans. It is anticipated there is room for further improvement by the Campus Energy Partner during development. A campus goal is to provide educational opportunities to the estimated 2.2 million annual visitors; to teach people about district energy, clean energy, wastewater heat recovery and zero energy district development and operations.

A NEW STANDARD OF ENVIRONMENTAL AND SOCIAL RESPONSIBILITY The commitment to sustainability has affected every building project on campus, including Galileo’s Pavilion, a new 3,000-sq.-ft. academic building, A host of efficient practices and products, including variable refrigerant flow technology from Mitsubishi Electric, has made Galileo’s Pavilion a showcase of sustainability, with LEED Platinum certification.

Efficiency at JCCC was paramount, “We pride ourselves on being able to promote sustainable everything, so HVAC is no exception,” says Rockhill. VRF was the clear choice. For Galileo’s Pavilion, “We wanted to demonstrate the most technologically advanced equipment in the industry. So VRF and its capacity to simultaneously cool and heat all of the spaces within the building was a fit,” said Rockhill.

CLEAN ENERGY GOAL The Center set goals, including becoming a zerowaste-to-landfill campus by 2025 and a 100% renewable energy campus by 2050.

Michael Rea, JCCC’s sustainability project manager, is pleased with the VRF system, “Everything with the Mitsubishi [Electric] system has been going well. Our maintenance is easy—just changing the filters and making sure the condensers are clean.” Photos: Studio 804 50 | 07.18 | NET ZERO BUILDINGS

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07 IBC

THE SUPER INSULATED SHELL OF CASTLE SQUARE, IN COMBINATION WITH THE SUPER INSULATED REFLECTIVE ROOF, HIGH-EFFICIENCY WINDOWS AND EXTENSIVE AIR SEALING, INCREASED THE INSULATION VALUE OF THE BUILDING BY A FACTOR OF 10. NEXT ISSUE

The next issue, our annual Greenbuild product and conference highlights/ preview companion, includes products relating to what will be shown or presented in many of the educational sessions at this year’s Chicago Expo. We’ll also include a recap of a special roundtable discussion from the AIA conference in New York, which will focus on alternative envelope and HVAC strategies the Big Apple is considering to produce more Passive House results with corresponding HVAC systems. Discussion will include the impressive results at Castle Square, a deep-energy retrofit in Boston.

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CASTLE SQUARE APARTMENTS Boston, Mass.

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| END POINT |

JOHN MESENBRINK

A Rising Star A brilliance seen in his work and the relationships he formed inside and out of the office, Alex left us with cherished memories, and he will be terribly missed.

Every year NZB conducts a readership survey and every year the results of said survey are overwhelmingly positive. This year was no different. “Very well designed magazine” to “Great, useful information” are some of the comments we receive here at central HQ. We certainly appreciate all of your feedback, and it drives us to do better, and to continue to publish a useful, visually pleasing magazine. A huge part of the design team was Alex Mastera, a rising star in talent, exuberance and personality. He helped take on the task nearly six years ago to advance an idea of net-zero concepts and transform them into brilliant pages that would bring our stories to life. His dedication to his craft was evident within these pages, and he took on any task that was asked of him.

In fact, I’ve been in the publishing business for more than 20 years and this is the first art team that I’ve worked with that actually reads the stories and corroborates with the editorial team to best understand the placement of artistic elements within the magazine. The dedication to understanding how each graphic synergizes with text is certainly a gift, one that Alex definitely exhibited. It’s really a wonderful thing to behold. The outcome is that goal to produce a well-designed, useful publication. Over this past Memorial Day weekend, while most of us were enjoying time with family and friends, something heartbreakingly awful happened. Our rising star Alex passed away while enjoying time away with his wife and extended family. Words cannot describe or express enough how we feel at work. He was a dear friend, a staunch supporter of our magazines, and to the net-zero cause.

As editorial director Jim Crockett mentions in his opening column, while at his wake, Alex’s wife Kelly displayed a portfolio he recently completed, which included NZB content, including the illustration he came up with for the March 2017 cover story. For me, this is incredibly humbling but it is just another example of how much he cared about his work. The office, full of laughter on most days, has been a little quieter these days as we reflect on the good memories we have of Alex. I’m sure the mood will lighten as time goes on, but it has been tough, no doubt. And I know this may sound cliché, but Alex would want us to carry on and to fill that office with laughter soon enough.

Alex Mastera, 1988-2018 Associate Art Director, friend, colleague and NZE supporter.

My heart goes out to his wife, family, friends, workmates, and anyone who knew him. So when we discuss the health of high-performance buildings, perhaps we should take a moment to reflect on our own lives. Hug your kids and loved ones. Be good to each other. Our rising star will always shine bright in our memory, but we will “for sure” miss our dear friend and colleague.

John Mesenbrink Contributing Editor jmesenbrink@cbmedia.us.com

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A DIVISION OF

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Net Zero Buildings - July 2018  

Highlighting the Path Toward Net Zero Building Design.

Net Zero Buildings - July 2018  

Highlighting the Path Toward Net Zero Building Design.