H.R.4574: To amend the Internal Revenue Code of 1986 to provide a shorter recovery period for the depreciation of certain systems installed in nonresidential real property or residential rental property.

Amends the Internal Revenue Code to provide for accelerated depreciation of certain energy-efficient heating, ventilation, air conditioning, or commercial refrigeration property installed in nonresidential real property or residential rental property and placed in service before January 1, 2012.