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Professional 1400 Series Replacement Windows and Doors

Evolutionary thermal efficiency. Revolutionary Performance and Protection. How you live is more than how you look. It’s how you perform. How you act and feel, under every condition life can throw your way. We can say this with certainty, because we’ve been around long enough to experience (and help guide) the evolution of window thermal efficiency. And, we’ve taken part in revolutionary ideas in performance and protection along the way. Today, when it comes to thermal efficiency, no other vinyl window manufacturer can match MI’s commitment to producing the highest quality, most thermally efficient windows and doors on the market.

Insulating glass unit with low-conductance spacer Argon gas TMAX™ Low “E” coating Low-conductance spacer

Low “E” glazing system — the lowdown on high performance. The latest generation in the evolution of MI’s high-performance glazing system options, including proprietary TMAX™ Low “E” and warm-edge technology keep your home comfortable and energy efficient. The TMAX™ glazing system meets ENERGY STAR® guidelines for energy efficiency in all US climate zones, and these latest advancements deliver optimum performance under the widest possible range of conditions. A combination of an insulating frame and sash, fusion-welded construction, continuous weather stripping and integral glazing help resist air and water infiltration.

A detailed system for innovation, quality, and comfort. TMAX™ is not an isolated innovation. It’s a uniquely designed system that truly gives you the best balance of performance attributes. An approach in which every detail counts, and combines: n Multi chambered airspaces and fusion welding in the frame and sashes. n Double-pane insulating with Low “E” on the inside surface and enhanced with argon gas. n Low-conductance material spacer between the two panes. n The result is increased insulation value, increased warmth, and decreased condensation.


Traditional craftsmanship is the first thing you see in 1450 double-hung windows, boasting a detailed feature like a beveled exterior edge. A closer look reveals this crafted style is made even stronger through advanced engineering details. Solid vinyl construction and operating hardware that’s been time-tested for decades make the double-hung window the ideal pick if you’re looking for design flexibility.

Multi-chambered construction provides thermally efficient air pockets Envirosealed™ Spacer System reduces energy costs

Easy cleaning.

Spring-loaded tilt latches allow sash to tilt in for easy cleaning from inside the home.

Maintenance-free, vinyl extrusions will not stick or swell due to moisture

Insulating glass package helps reduce heating and cooling costs

Fully weatherstripped to keep wind and weather outside

Metal reinforcement for added durability Trouble-free operation.

1/2" stainless steel balance system applies a constant force so sashes lift and lower easily — and stay where you put them. They never sag and they never need adjustment.

Also Available: Slider Sloping sill design prevents interior water leakage

A vast offering of styles from single double sliders, or even three-lite or vent styles to expand your design horizons.

Both sashes are drop-in glazed for easy sash removal

Patented Detent Clip prevents sash drift by securing top sash in position when fully closed

Forced entry resistant Cam Latch - meets new AAMA requirements, provides security in the home

Full length lift rail for easy up and down operation


With plants across the country, MI Windows and Doors is one of America’s most respected manufacturers of vinyl, aluminum and composite window and door products. Since 1947, we’ve focused on great people making great products. To us, “Seeing You Through” is a philosophy that goes beyond the factory, beyond the warehouse, and right into each home and construction site. It’s what drives us to manufacture products that are complete, accurate and delivered on time. But most of all, it’s why our customers place their trust in us.

Individual products may be subject to a variation in performance. For additional product information, technical documents, installation instructions and warranty information, please visit:

Eastern Region n 650 West Market Street, Gratz, PA 17030 n 717-365-3300 n Western Region n 7555 East State Route 69, Prescott Valley, AZ 86314 n 1-888-376-4230 Southern Region n 1001 West Crosby Road, Carrollton, TX 75006 n 1-800-376-0835 LMI 0260 11/12

Mi Professional 1400 Series  

Mi Professional 1400 Series

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