ENERGY STAR qualified windows and patio doors
Frequently Asked Questions

1. What's the difference between an ENERGY STAR qualified product and a standard product?
ENERGY STAR qualified windows and patio doors incorporate several performance features, including double or triple glazing with a sealed insulating glass unit, low emissivity or "low-e" glass, inert gas such as argon or krypton in the sealed unit and low conductivity or "warm edge" spacer bars.


2. Does an ENERGY STAR qualified window or patio door cost more?
ENERGY STAR qualified products don't necessarily cost more than standard products. When they do, the money you save on heating should quickly cover the extra cost. In addition, your ENERGY STAR qualified windows and patio doors can help increase the resale value of your home.


3. Can I make a better purchasing decision based on climate zones?
When you buy a window or patio door that is qualified for the zone you live in, you already benefit from a highly energy-efficient product. If the product is qualified for a zone that is colder than where you live, you'll save even more on your heating costs.


4. I'm buying a new home… What should I be looking for?
Because new homes often have a large floor area and a significant number of windows, their owners have a lot to gain by selecting the most energy efficient products available. If your house is under construction, ask your builder to install ENERGY STAR qualified windows and patio doors.


5. What about installation?
Proper installation will prevent heat loss and air infiltration around the frame. Come time to install your windows, be sure to hire a specialist.

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