Home Energy Efficiency Improvement Tax Credits Consumers who purchase and install specific products, such as energy-efficient windows, insulation, doors, roofs, and heating and cooling equipment in existing homes can receive a tax credit for 30% of the cost, up to $1,500, for improvements "placed in service" starting January 1, 2009, through December 31, 2010. See EnergyStar.gov for a complete summary of energy efficiency tax credits available to consumers.
About Tax Credits A tax credit is generally more valuable than an equivalent tax deduction because a tax credit reduces tax dollar-for-dollar, while a deduction only removes a percentage of the tax that is owed. Consumers can itemize purchases on their federal income tax form, which will lower the total amount of tax they owe the government.