AFUE is a measure of how efficient your furnace is in the energy in its fuel over the course of a typical year. Older furnace  systems have efficiencies in the range of 56%–70%, while newer conventional heating systems efficiencies can be as high as 97%, converting nearly all the fuel to useful heat for your home.  A new Energy efficiency furnace can often cut your fuel bills and your furnace’s pollution output by half.  If  your in the market for a new furnace you can be sure that  you will save on your monthly heating bills, your indoor air will improve and you and your family will be heated more comfortably.  Call Premier Air Colorado at 303-993-9060 for all your heating and cooling needs and for a free estimate and to learn more visit .