What is the major difference from my old furnace and a new furnace?
Your Old furnace was a non-induced furnace and probably 50 to 60 % efficient, although they were not rated in those days. New furnaces are 80% AFUE (efficient) and they are available up to 93% efficient. New furnaces are incapable of “back-drafting” as was a common problem with older furnaces. • What is AFUE/ what is SEERAFUE means Annual Fuel Utilization Efficiency, is the government rating to compare one furnace to another & compare its fuel ( gas) efficiency. SEER stands for Seasonal energy efficiency Rating & is another government or industry standard to compare the electrical efficiency of one product to another.
