ACE Home Services 5th Annual AC Giveaway for Veterans

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Annualized Fuel Utilization Efficiency (AFUE)

The thermal efficiency measurement of combustion equipment, such as your furnace or water heater, is referred to as annual fuel utilization efficiency (AFUE). Pronounced ‘A’-‘Few’ is different than the true thermal efficiency as it is a measurement of season-long, average efficiency as opposed to a steady-state, peak measurement.

See also  British Thermal Unit (BTU)
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