AFUE

AFUE

If you’re in the market for a gas- or oil-fired furnace, the Annual Fuel Utilization Efficiency (AFUE) rating is a helpful stat to know.

Displayed in percentages, the AFUE rating tells you how much of the fuel consumed by your furnace is used to heat your home and how much is wasted. The higher the AFUE rating, the greater the efficiency. For example, a 90% furnace creates heat, 90% of which is used directly by the home with 10% lost, generally as a result of venting. We offer a full line of furnaces, some with AFUE ratings that exceed 98%. We also boast the most efficient gas furnace on the market.*

If you have an older furnace (with an AFUE of approximately 64%), you could save a staggering 34% on your heating bills simply by replacing it with a new high-efficiency furnace—and make up the cost of replacing your old, inefficient furnace pretty quickly.

If your furnace is more than 15 years old and you’re not sure of its AFUE rating, you can contact the manufacturer about it. When you call, you’ll need to have the furnace’s serial number handy. Chances are you’ll find it on a small metal plate attached to the unit.