Exterior doors vary greatly in their ability to keep Mother Nature at bay. Though some exterior doors can leak energy and allow drafts, new high-efficiency models serve as excellent barriers to heat loss and gain. If you’re a U.S. taxpayer and have recently installed or are thinking about buying new high-efficiency exterior doors, be aware that you may be eligible for tax credits--up to $2500 for 2010 or $200 for 2011.

What is covered by these programs?  Beginning June 1, 2009, eligible doors must have a U-factor and Solar Heat Gain Coefficient (SHGC) less than or equal to 0.30. This is not just an Energy Star–certified door—it is a super-efficient door. The dealer can let you know whether a door you’re considering meets this criteria.

For the 2010 tax credit, the exterior door must have been placed into service in your principal residence between Jan. 1, 2009, and Dec. 31, 2010. For the 2011 tax credit, it must be installed by December 31, 2011.

A Manufacturer’s Certification (a statement from the manufacturer certifying that the product qualifies for the tax credit) is often available from the manufacturer’s website. This should be kept with your tax records along with your receipt. When filing your federal tax return, submit IRS Tax Form 5695.

The amount of the 2010 federal tax credit is 30% of the cost of the door, up to $1,500; the 2011 tax credit is 10% of the cost up to $200. The cost of Installation is not included.

(For more information, see the Exterior (Entry) Doors Buying Guide)