What is the AFUE number on the yellow sticker on my appliance mean?
AFUE is an attempt by the Department of Energy to measure how much heat stays in the system versus how much escapes up the chimney. The higher the AFUE rating, the greater the efficiency. However, AFUE test procedures have some problems. NORA is now conducting a study to determine how much energy is really used to keep your home warm and to keep plenty of hot water flowing for a normal family. We believe that this will revolutionize how Americans make appliance purchases.
