» Our furnaces and systems can achieve up to 97% efficiencies — Converting nearly all the fuel to useful heat for the home. Find out about Annual Fuel Utilization Efficiency:

» A furnace's efficiency rating, or AFUE (Annual Fuel Utilization Efficiency), tells you how efficiently the furnace uses fuel (gas or oil). In general, the higher the efficiency %, the less fuel the furnace will use to heat your home.

» Heat pumps have heating efficiency ratings indicated as an HSPF (Heating Seasonal Performance Factor). In general, the higher the HSPF rating, the less electricity the unit will use to heat your home.

An ENERGY STAR product not only helps you save money at home, but it also helps protect the environment. Last year alone, Americans, with the help of ENERGY STAR, saved enough energy to power 20 million homes and reduce greenhouse gas emissions at a level equivalent to 18 million cars.
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Government Information on Furnaces