AFUE rating measures the efficiency of which equipment?

AFUE rating measures the efficiency of which equipment?

• A. Gas-fired furnace
• B. Air conditioner
• C. Water heater
• D. Oil boiler

Answer: (A)

AFUE, or Annual Fuel Utilization Efficiency, measures how efficiently a heating unit that burns fuel converts that fuel into usable heat over a year. It’s expressed as a percent, with higher numbers indicating less fuel wasted as heat. This rating is applied to heating equipment such as furnaces and boilers, especially gas-fired ones (and also oil-fired units). It does not measure cooling performance (that uses SEER) or water-heating efficiency by a different standard (like Energy Factor). In typical practice questions, the gas-fired furnace is the classic example of AFUE, which is why that option is the best match here.

AFUE, or Annual Fuel Utilization Efficiency, measures how efficiently a heating unit that burns fuel converts that fuel into usable heat over a year. It’s expressed as a percent, with higher numbers indicating less fuel wasted as heat. This rating is applied to heating equipment such as furnaces and boilers, especially gas-fired ones (and also oil-fired units). It does not measure cooling performance (that uses SEER) or water-heating efficiency by a different standard (like Energy Factor). In typical practice questions, the gas-fired furnace is the classic example of AFUE, which is why that option is the best match here.