Savings From an Energy-Efficient Furnace

Gas Furnace

Annual savings projected for a 2,500-square-foot home by replacing a less efficient gas furnace with a new 90-percent efficient gas unit, assuming a price of 42.5 cents per cubic meter of natural gas.  


  replacing a 60% efficient furnace replacing a 78% efficient furnace
Portland, Maine $1,227 $355
Pueblo, Colo. $1,227 $298
Albuquerque, N.M. $1,040 $263
Orlando, Fla. $277 $56
San Diego, Calif. $146 $59