What is AFUE?

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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.

Before purchasing a new furnace, it is important to check the AFUE rating on each model and to compare different models on this basis. Higher AFUE ratings have a higher price initially, BUT years of low running prices, which will actually save you money! Especially during icy Alberta winters, when the furnace is used constantly and your bills are sky high, you will notice the difference between payments. Therefore, a higher AFUE rating is a long-term investment. As always, if you have any questions regarding your HVAC unit, we encourage you to reach out to your local Trane dealer.

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