Q: When do these new credits go into effect?

A: Unless stated otherwise in the bill, January 1, 2009 is the effective date. Specifically regarding the residential efficiency credits, the expanded $1,500 credit is retroactive to the start of 2009. Products that qualified for the existing $500 credit will still qualify for the $1,500 credit if installed prior to 2/17/09. Equipment installed 2/17/09 through 12/31/2010 must meet the minimum requirements outlined in HARDI's summary of the bill.