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|
|San Diego, Calif.||$146||$59|
Annual savings projected for a 2,500-square-foot home with replacement of a less efficient oil furnace with a new 83-percent efficient oil unit (assuming an oil price of $3.35 per gallon)
|replacing a 60% efficient furnace||replacing a 75% efficient furnace|
|San Diego, Calif.||$200||$96|
Calculations based on the U.S. Department of Energy’s "Life Cycle Cost Estimate for an Energy Star Qualified Residential Furnace." You can do calculations for your situation by using the spreadsheet on the Energy Star Web site. Search for “furnace calc.”
For more information on the energy savings of newer, more efficient furnaces, read Save Money with a New, Energy-efficient Furnace.