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Find HVAC Companies, HVAC Suppliers, AC Service companies, in your locality
#Gasfurnace efficiency is expressed as an Annual Fuel Utilization Efficiency(AFUE). The AFUE represents the percentage of the heat available in the fuel that is converted to useable heat for your home. For example, a furnace rated at 80% AFUE will deliver 80% of the heat available in the fuel. The remaining 20% is lost as exhaust up the flue or chimney.
