Our Terms of Service and Privacy Policy have changed.

By continuing to use this site, you are agreeing to the new Privacy Policy and Terms of Service.

6 of 10
BACKNEXT
Windows and doors
The tax credit will pay 30% of costs, minus labor, for qualified window upgrades in 2009 and 2010. The credit is capped at $1,500. But you must install the best.

Only the most efficient windows, doors, and skylights on the market will qualify, and it's been quite a shake-up to the industry, says Jim Benney, the executive director of the National Fenestration Rating Council, which rates and labels windows and doors for efficiency. "The industry was surprised by the bill," says Benney. "The public needs to make sure they are getting products that actually meet these requirements."

Windows and doors must have a so-called U-factor below .30 and a Solar Heat Gain Coefficient (SHGC) less than .30 to meet the requirements for a tax credit. The U-factor measures the rate at which heat leaks from a window--the lower, the better. The SHGC measures how well the window blocks heat caused by sunlight.

Benney said the standard product lines of most manufacturers, even many with an Energy Star rating, don't meet this stringent standard. But there are qualified products out there. Andersen Windows is highlighting a few dozen on its Web site.

For even more choices, the NFRC has compiled an extensive list of qualifying windows, which you can download here. You should also check the U-factor and SHGC on the NFRC label on Energy Star--qualified windows and doors you're considering buying.

NEXT: HVAC

Last updated May 07 2009: 12:57 PM ET
More Galleries
Banned! 10 things you won't find in China China says it wants to open its economy more to the rest of the world, but Beijing keeps a tight grip on technology and access to media. These 10 items are still off limits. More
A morning at the AltSchool, an education startup that Silicon Valley is crazy about The AltSchool is a system of "micro schools" and an education software maker that has raised about $133 million from investors like Andreessen Horowitz and Mark Zuckerberg and Priscilla Chan's philanthropic fund. More
Coolest cars for $18,000 These are the best budget cars, according to the experts at Kelley Blue Book. More

Special Offer