Below you will find the ESP Tax Credit Certificates:
This page is here to
guide homeowners in the right direction for questions regarding
the Federal Tax Credits for Energy Efficiency.
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http://www.energy.gov/taxbreaks.htm
For tax years 2009 and 2010 - Manufacturer Tax Credit 2009 30% -

American Recovery and Reinvestment Act of 2009
For tax year 2011 - Manufacturer's Certification Statement -

The Tax Relief,Unemployment Insurance Reauthorization and Job Creation Act of 2010