NOTE: Annual cost estimate shown is based on a Midwest home with a heat load of 45,000 btu/hr, off-peak electric rate of $.04/kWh, standard electric rate of $.075/kWh, propane at $1.60/gal, fuel oil at $2.50/gal, natural gas at $1.20/therm. Your operating costs may vary based on the local energy costs and your home's heating need (which is affected by size, insulation value, temperature maintained, your local climate, etc.,) . The above graph proportionately shows the relation of annual heating costs for most areas. Contact your local dealer for a comparison based on your specific home.