As much as half of your annual utility bills can be spent on heating and cooling your home. You can save money on your gas, propane or oil bills while enjoying the same level of comfort by selecting a furnace or boiler with a high efficiency rating.
Furnaces and boilers have an efficiency rating called AFUE (Annual Fuel Utiliazation Efficiency). The higher the AFUE number, the more fuel efficient the unit is. Higher efficiency furnaces and boilers produce the same amount of heating as lower efficiency units of the same output BTU size (see Selecting Furnace Size), while saving you money by using less gas, propane or oil.
Currently the lowest efficiency products available from most manufacturers is 80%, although it is still significantly higher than older unit's efficiencies which are sometimes as low as 60%.
We have furnaces and boilers of multiple efficiency levels for you to choose from 80% AFUE to 95% AFUE. The higher the AFUE, the higher the initial investment cost of the equipment, but the lower the operating cost. Which efficiency unit you decide to install is up to you. To help you select, you can use this Equipment Efficiency Comparison Calculator to see how much you might save in operating costs by comparing different efficiency units for your particular home.