Frequently Asked HVAC Questions

AFUE is the abbreviation for ‘Annual Fuel Utilization Efficiency’ ratio. AFUE is the percentage assigned to rate furnace efficiencies by dividing the ratio of heat output by heat input. This measurement describes how well fuel, natural gas or propane is consumed to produce heat by a furnace. As the AFUE percentage rate increases, the efficiency of your furnace also increases, which can help to lower your fuel costs.