Commercial Windows and Doors
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Discover Reliability and High Performance
Discover comfort, reliability, and efficiency with Alpen's Zenith fiberglass commercial windows and doors. We design these commercial building windows to meet or exceed modern building codes. Fiberglass combines strength and lightweight properties, offers excellent thermal performance, and needs minimal maintenance. The Zenith series is perfect for architects and developers who focus on detail and need commercial door and window solutions that meet Passive House standards.
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Everything seems to be working fine and staying sealed up. I'm glad I got the Alpen windows like I did and when I did!
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Why Choose Zenith?
Unparalleled Performance and Comfort
Zenith redefines performance with its NFRC certified R-10 performance—the highest for commercial fiberglass windows in North America. This series goes beyond Energy Star standards, ideal for commercial window and glass needs.
Long-Lasting Durability
Our commercial window frames made of long-strand pultruded fiberglass, handle extreme climates effortlessly. They are stronger than aluminum and more durable than vinyl, making them perfect for any setting, including harsh environments.
Superior Water and Air Resistance
Designed to withstand severe weather, our windows and doors are AAMA certified for wind, water, and air resistance. This ensures your commercial glass windows protect against water damage and air infiltration.
North American Styling & Architectural Freedom
Designed to fulfill your creative vision, Zenith windows offer robust customization options. They are ideal for large storefront windows, allowing in more natural light due to their high glass-to-frame ratios.
Enhanced Peace and Quiet
Experience tranquility with Zenith’s excellent acoustic insulation. Perfect for urban areas or close to noisy sites, offering effective sound attenuation.
Healthy and Safe Living Spaces
Our windows and doors reduce condensation risks and prevent mold growth. Zenith is the first commercial window glass certified under the Living Building Challenge "Red List Approved", ensuring a safe and healthy indoor environment.
Future-Proof Your Building
Invest in Zenith to save on energy and future upgrades. These windows and doors are built to exceed current and future standards, enhancing your building's efficiency and value.
Built for All Climates and Conditions
From the Empire State Building to the extremes of the Arctic Circle, Zenith windows perform flawlessly in any environment.
Sustainability Focused
Zenith's frames, made primarily from sand-derived silica, are the most environmentally friendly choice, containing less embodied carbon than vinyl or aluminum frames.
Affordability without Compromise
We deliver high performance without the high cost. Our mission is to make superior commercial windows for storefronts accessible, promoting a greener, more sustainable world.
Ensuring Customer Success
Choosing Alpen means gaining a partner committed to your project's success. We offer American-made quality with shorter lead times, ensuring your project stays on track.
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Features and Specifications
Whole window performance up to R-10
Fixed window NFRC Certified to U-0.10 (R-10), operable windows (open and close) NFRC Certified to U-0.14 (R-7.1)
Proprietary, tested “any altitude” gas retention system adjusts to all locations and altitudes.
Non-toxic, airtight construction with virtually no air and water infiltration. Triple gasket seals deliver best-in-class insulation values.
Super-insulating closed-cell foam in both frame and sash cavities provides maximum thermal insulation and condensation resistance
Directionally tuned glass available in triple- and quad-pane configurations with advanced ThinGlass glazing technology.
NFRC, PHIUS, AAMA, NAMI, Living Building Challenge Declare Label and Energy Star certified.
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Rigorous testing shows that the Zenith fiberglass frame can handle extreme temperature swing stresses and withstands the design loads of very high wind areas.
Permanently sealed double interior frame gaskets, flexible neoprene glass compression seal.
Water and Air protection:Air infiltration rates as low as 0.01 CFM per square foot.
Multi-chamber frame with thick wall extrusions for enhanced compression sealing.
Co-extruded center frame/sash seal, glazing spine, and double fin glazing stop for robust defense against external elements.
Mechanical fastened corners for sustained protection from air and water infiltration throughout the product's lifespan.
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Whole window sound attenuation performance up to STC 39 for a quieter indoor refuge. Up to 1 3/8” deep glass pocket provides flexibility for acoustic glass performance.
Healthy and Safe Living Spaces
Engineered to reduce condensation and prevent mold and mildew growth.
First North American window to be certified under the Living Building Challenge Declare label “Red List Approved”, meaning it does not contain harmful chemicals proven to be harmful to the environment.
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North American operation and sight lines.
99.5% UV protection reduces interior fading and damage while protecting occupant health.
Frame takes paint easily compared to vinyl or aluminum for color and design flexibility over the life of the windows.
Zenith is available in the following styles:
- Fixed
- Casement
- Awning
- Patio door
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and Architectural Design Manual
