| http://www.w3.org/ns/prov#value | - The tax credit for efficiency upgrades in existing homes (Internal Revenue Code Section 25C) is available for 30 percent of the cost, up to a $1,500 limit for 2009 and 2010, for the installation of certain types of insulation, windows, roofs, water heaters, heat pumps, air conditioners and furnaces.
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