Energy Efficiency

Products that are good for our partners and our planet.

Built into every Western Window Systems moving glass wall and window is a belief that your design ideas, not energy or structural limitations, should determine the look of your project. That’s why our products address energy and structural requirements while promoting the thin profiles and large expanses of glass that have made Western Window Systems a centerpiece in so many residential and commercial projects.

Because our products are completely customizable, you can select or combine options that meet your project’s performance requirements.


How to Comply with Energy Codes Without Compromising Your Vision

The ultimate goal of an architect is to utilize a revered blend of planning skills and creative… Read more»


Strategies for Engaging Natural Light in Design

Daylight. It can be fresh, beautiful, delicate, warm, and renewing – humankind’s first illumination, long before the… Read more»


San Diego Sanctuary

Energy efficiency meets contemporary architecture. Architect Jimmy Sullivan’s Hillcrest Hideaway design is a testament… Read more»


Glass & Glazing

Insulating Glass

Western Window Systems products feature low-E, argon-filled, dual-pane glass, which blocks heat loss to the outside while reflecting heat back into a room. This helps to reduce heating and cooling costs. Glass can be customized in a variety of types, colors, and thicknesses to meet the performance challenges of various climates.

Cardinal Glass

Western Window Systems’ Series 7000 family of performance-based door systems and windows come standard with all-climate coated or high-performance glass from Cardinal Glass Industries. Customized glass options include laminated glass, solar- and glare-control glass, enhanced winter performance glass, and Neat low-maintenance glass. Pre-applied Cardinal Preserve film protects glass through installation.

Energy Star


To receive ENERGY STAR certification, a window or door must meet a set of energy performance levels determined by the U.S. government. ENERGY STAR criteria varies in different areas of the country. Select products from Western Window Systems Series 7000 performance-based family meet rigorous ENERGY STAR specifications.

Materials and Performance

Thermally Broken Aluminum

Many Western Window Systems door systems and windows are available with the option of thermally broken aluminum, which features an insulating barrier that increases energy performance.


Our door systems feature tight, durable seals that help control humidity and moisture and minimize air leakage.

Air, Water, and Structural Performance

Western Window Systems’ door systems and windows are subjected to air, water, and structural testing and are tested and certified by the NFRC (National Fenestration Rating Council) and AAMA (American Architectural Manufacturers Association).


"If you can get the kind of performance that Western Window Systems offers for this kind of price, it makes it much likely that you’re going to be able to use products like this and have a more energy-efficient building." Whitney Sander, Sander Architects



Certified Wood

Our wood panels are certified by the FSC (Forest Stewardship Council), a group that ensures products are made with, or contain, wood from FSC-certified forests.

Recycled Materials

Western Window Systems products are made with aluminum, a highly recyclable material. We recycle our aluminum as well as materials such as vinyl, cardboard, and paper.

"Every window is custom-sized to the home, and Western Window Systems compared favorably to other window companies that were far more expensive." Daniel Salzman, owner, Salzman Design Build


Title 24 (California only)

Take the guesswork out of California's energy code.

With two product lines of moving glass walls and windows and numerous glazing options, Western Window Systems is able to help you in meeting California’s rigorous Title 24 requirements. For more information, download our brochure.