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Schools of the Sacred Heart

Case Study

Siboni Arts & Science Center Evaluation LOCATION

San

Francisco,

CA

|

DATES

2016

-

2017

|

SIZE

42,208

SF

A school building gets graded on its indoor environmental performance TYPE K-12 SERVICES SCOPE Study Design Sensor Deployment Assessment Energy Evaluation Indoor Air Quality Evaluation Strategic Guidance

CHALLENGE | The Schools of the Sacred Heart is a K-12 school with a student body of 3,000. Its urban campus is spread across 11 buildings (272,611 SF) with a total classroom count of 100. The Siboni Arts and Science Center is the second largest building. Built in 2005, the 5-story building houses science labs, art and music studios, a 355-seat auditorium, and gymnasium. The school sought to evaluate the indoor environmental quality of the building to inform strategies to improve operational efficiencies and optimize classroom conditions for learning.

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Temperature & Relative Humidity

Energy Use (kWh)

Radiant Temperature

Occupancy & Light

Illuminance

CO2 Level

Sound Level

Air Speed & Light

PERFORMANCE INDICATORS Eight

types of sensors were deployed to collect baseline data

DISCOVERY | The project team designed a 14-week study to research three questions: Classroom Performance Comparison How is the building performing over time, across the building, and compared to established standards? AMY NAGENGAST

Resource Use Comparison How does performance relate to resource use?

As lead consultant Amy engaged with stakeholders, designed the study, directed data collection and conducted analysis to inform recommendations.

Environmental Resource Comparison How well does performance utilize naturally available environmental resources?

Senior Strategist, MKThink

A total of 65 sensors was deployed in a representative sampling of 9 classrooms to measure energy use, thermal quality, indoor air quality, lighting quality, and acoustics. Historic weather data combined with architectural plans, diagrams of HVAC systems, and building schedules provided analytic context to interpret the sensor data. GEOFF DE SANTIS

Plant Operations Director, Schools of the Sacred Heart The evaluation had an immediate impact on students, faculty, and the building. Classrooms become a calmer space because of the reduction of artifical light and the productivity went up.

Schools of the Sacred Heart: Siboni Arts & Science Center Performance Evaluation

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AVERAGE SOUND DECIBEL LEVELS ON SCHOOL DAYS FOR 2-MONTH PERIOD AT 5-MINUTE INTERVALS

Average Room Sound Level 90 Occupational Safety Issue 80

5210 5305

70

Sound Level (dB)

60

50

Sound Level Ideal

40

5109 30

5B09

20

1 10

7:45 AM

0 12 AM

2 AM

4 AM

6 AM

8 AM

3:15 PM 10 AM

12 PM

2 PM

4 PM

6 PM

8 PM

10 PM

12 AM

Time Classroom

Average

5B09 Music

5109 Auditorium

5114 Art

5210 Lecture

5216 Lecture

5218

5305

Lecture

Science

5308 Lecture

5402 Lecture

*Recommended sound levels based on Acoustical Society of American: Acoustical Performance Criteria for Schools, 2015.

FINDINGS Classrooms 5109 and 5809 were the only rooms to remain in Decibels) for more than 40% os school hours during school days .

Schools of the Sacred Heart: Siboni Arts & Science Center Performance Evaluation

the ideal sound quality range

(<40

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CLASSROOM PERFORMANCE SUMMARY Days: School Days Hours: School Hours Interval: 5 Minute (Average)

Indoor Environmental Quality % of time sound, air, thermal & lighting quality criteria met

Sound Quality

Air Quality

Thermal Quality

Lighting Quality

percentage of time sound level < 85 dB

% of time C02 < 1100 ppm

% of time -0.5 < mean < 0.5

% of time light levels > 7 ft-c

High Performance

100%

100%

Above Normal (>80%)

5216 5218 5210

Normal (50-80%)

5402

5B09 5109 5114 5210 5216 5218 5305 5308 5402

100%

100%

5B09 5109 5114 5210 5216 5218 5308

100%

5114 5210 5216 5218 5402 5308

5216 5218 5210 5402 5305

5402 5305

5308

5308

Below Normal (<50%)

5109

0%

5305 5114

5305

5B09

5B09

5109

5114

0%

0%

0%

5B09

0%

5109

Low Performance

ASSESSMENT | Analysis of the sensor data sensors yielded the following findings: Classroom Performance Comparison • Indoor environmental air quality was adequate 55% of the time. Resource Use Comparison • Air Handling Unit operations had two primary energy use profiles; one used 50% less energy to generate comparable thermal quality and lightning quality. Environmental Resource Comparison • Daylight offers ample lighting 22% of the time. • Exterior weather provides sufficient interior thermal quality 5% of the time. • Outside air quality (C02 concentration) was better that indoor air quality 85% of the time.

Schools of the Sacred Heart: Siboni Arts & Science Center Performance Evaluation

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POTENTIAL VALUE SUMMARY: RESOURCE SAVINGS*

Air Handling Unit Optimization Reduce AHU energy use by 50% through changes in Variable Frequency Drive motor control and/or AHU Schedules

Estimated Annual Energy Savings AHU #4 (1,455 SF)

$288

per year

0.3

metric tons C02/yr

Whole Building (42,208 SF)

$8,358

per year

7.7

metric tons C02/yr

Estimated Annual Energy Savings

Lighting Energy Conservation Reduce lighting energy use by 50% through changes in lighting controls or delamping

Estimated Annual GHG Reduction

3 Classrooms (1,712 SF)

$185

per year

0.2

metric tons C02/yr

Whole Building (42,208 SF)

$4,559

per year

4.2

metric tons C02/yr

Estimated Annual Energy Savings

Daylight Opportunity Reduce lighting energy use by 8-26% from turning off electric lights when daylight is adequate to meet light levels

Estimated Annual GHG Reduction

Estimated Annual GHG Reduction

5 Classrooms (3,570 SF)

$125

per year

0.1

metric tons C02/yr

Whole Building (42,208 SF)

$1,479

per year

1.4

metric tons C02/yr

*Estimates are preliminary and conceptual, not a guarantee of actual savings.

RECOMMENDATIONS | The objective of the evaluation was to establish a baseline for indoor environmental quality. Informed by the baseline findings, MKThink did formulate conceptual recommendations for enhancing environmental performance. These included increased occupant control over lighting and temperature, installing a building management system Thermal Quality

Energy Resource Use

1.

1.

2. 3. 4. 5.

Establish setpoints based on occupancy, room schedules, and outdoor temperature. Establish setpoints specific to each season. Install ceiling fans to increase air flow. Use cooler outdoor air to flush out excess interior heat at night (nightflushing). Install thermostats with digital displays.

Modify central lighting control schedules to better align with use patterns. 2. Replace flourescent bulbs with LEDs. 3. Install a Building Management System to allow for remote management. 4. Install smart plug load controls that turn off electronics when not in use.

Lighting Quality

Occupant Education

1.

1.

Install automatic daylight controls to adjust electric light based on daylight availability.

2. Provide occupants with controls to adjust lighting to fit activity.

Provide primers in daylighting and in use of windows to lower C02 and increase air flow. 2. Install digital dashboard for occupants to monitor individual classroom performance.

Schools of the Sacred Heart: Siboni Arts & Science Center Performance Evaluation

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Schools of the Sacred Heart: Siboni Case Study