From June 1, 2009 - December 31, 2010 windows and doors) must have a U-factor and Solar Heat Gain Coefficient (SHGC) less than or equal to 0.30.
From January 1 - May 31, 2009 all ENERGY STAR qualified windows and doors qualify, except for doors in several counties in California**.
You do not have to replace all the windows/doors/skylights in your home to qualify. And it doesn't need to be a replacement either - installing a new window where there wasn't one previously (like in an addition) would qualify.
Between February 18, 2009 and December 31, 2010, replace old windows and doors with All Seasons Door & Window's qualifying products that meet or exceed3 a 0.30 U-factor and 0.30 Solar Heat Gain Coefficient (SHGC).
Learn more about federal tax credits at www.energystar.gov. ENERGY STAR® is a registered trademark of the U.S. Environmental Protection Agency.
Learn more about the Economic Stimulus Plan (American Recovery and Reinvestment Act of 2009) at www.irs.gov.