HVAC & PLUMBING BLOG

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.

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