Furnace Articles

What Does AFUE Mean?

January 14, 2022
older couple on couch

The higher the AFUE rating, the more efficient the unit is. Typically the ratings or percentages you’ll see on new furnaces range from 80 to 100 percent (contingent upon the fuel type of furnace being rated). If a furnace has an AFUE of 80 percent, this means the furnace converts 80 percent of the fuel to heat your house, while the remaining 20 percent is lost, usually out the chimney.

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