In 2010, President Obama established a new standard of energy efficiency for the fenestration industry, requiring that windows and doors achieve a Solar Heat Gain Coefficient (SHGC) of 0.30 to qualify for the government’s tax credit. The SHGC is a measure of thermal efficiency; the lower the number, the less heat transmittance through the glass. Numerous manufacturers complained it was too stringent. Discount Windows & Doors commended the move.

As pioneers in the fenestration industry, Discount Windows & Doors selected Cardinal’s LoĒ3-366® glass (pronounced low E cubed-366) as the ultimate performance glass. This glass is able to achieve an SHGC of 0.16 — nearly half of the government’s requirement to achieve the tax credit. This product delivers the ideal balance of solar control and high visibility, and it provides the highest levels of year-round comfort and energy savings, making it the perfect glass no matter where you live. The secret: an unprecedented triple layer of silver. The silver coating on the inner side of the external pane, in conjunction with NEAT® self-cleaning glass, reflects more than 90 percent of heat away from the home. This is beyond ordinary low-E glass; LoĒ3-366 sets the new standard.

For years, Cardinal has worked with top-tier window manufacturers by providing energy-efficient low-E glass. Now with three layers of year-round thermal protection, the benefits are exceptional. The result: a clear coating that blocks even more solar gain than ever before, reflects heat and lets the light stream in.


The full-year benefits of Low E cubed-366 can be clearly seen. When the temperature soars in the summer, ordinary window glass just can’t beat the heat, and tinted glass spoils the view. It is formulated to reject solar heat while maintaining attractive visibility, so it keeps the heat out while letting light in. As a matter of fact, this product’s glass is our ultimate in performance and clarity among all of Cardinal’s clear-coated products.

What’s more, this new product provides the ultimate in fading protection. It blocks 95 percent of the sun’s damaging ultra-violet rays — a leading cause of fading (visible light also contributes to fading) — so your furniture, carpets, curtains and wall coverings stay beautiful for years.

During hot weather, the insulating effect of your windows has a direct impact on how your rooms feel. The better insulated the windows glass, the cooler your room will feel. If air conditioning is used within the home, there is an immediate and dramatic reduction in the cost of your bills from HECO by using Discount Windows & Doors thermally efficient windows. Discount Windows & Doors chose Cardinal Glass for all of its fenestration products; the insulating capability of LoĒ3-366 can’t be compared to any other glass product in North America.

According to the Consumer Federation of America, the average American household spends $1,500 per year on energy costs. But energy-efficient windows can help save a bundle.


In fact, you can reduce your energy bills by one-third by simply using low-emissivity (Low E) glass.

Not only does it make financial sense, it’s smart to do in view of limited global resources. Conscientious consumers are increasingly making purchasing decisions based on current environmental realities. By using products that reduce energy consumption, one diminishes their environmental footprint, limiting usage of fossil fuels and lowering carbon emissions.

Discover why Discount Windows & Doors is an industry leader by calling 673-6656.

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