What do all those rating numbers mean to me?

The federal government requires all air conditioning and heating equipment to be rated as to efficiency. The higher the rating, the more efficient the model. For cooling, the rating is SEER (Seasonal Energy Efficiency Rating); heat pump heating is HSPF (Heating Seasonal Performance Factor) and gas furnaces are rated with AFUE (Annual Fuel Utilization Efficiency). All of these ratings can be compared by asking your dealer, utility or referencing the ARI Directory. See our pages of Energy StarSM Products.