including storm doors, ï ¿ 1/2 â $ cents Roofing All ENERGY STAR qualified metal and reflective asphalt shingles, â $ cents Central Air conditioning, â $
cents Air source heat pumps â $ cents Natural gas, propane and oil furnaces, â $ cents Gas, propane, or oil hot water boilers, â $ cents Gas, propane or oil hot water heaters, â $ cents Advanced main air circulating fans.