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Understanding Furnace Efficiency With The Annual Fuel Utilization Efficiency (AFUE) Rating

It is estimated that around 25% of the furnaces in American homes is more than 20 years old. These older furnaces are often inefficent, sending up to 20% of the heat they produce out the chimney.

A common measurement of furnace efficiency is The Annual Fuel Utilization Efficiency (AFUE). AFUE is a measurement of the percentage of heat delivered for each unit of fuel supplied. Older gas furnaces may have an AFUE of around 80%, which means the furnace converts 80% of the fuel into heat for your home, while expelling the other 20% outside the home.

A newer, high-efficiency furnace can operate at up to 95% AFUE. This can add up to real savings. Depending on the age and efficiency of your old furnace, a new furnace could pay for itself to pay for itself in lower energy bills in as little as 5 to 8 years.

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  • “After a long day on a Friday (first snow of the year - lots of customers without heat), Dion L came to perform routine furnace inspection and filter change. Dion was courteous, efficient, informed us of all that he was doing, showed us an area of concern and how we…”

  • “Ron S., fixed an electrical short in the attic, which prevented a fire. He rewired the attic thru the bedroom ceiling light. He replaced an outside electrical connection, and repaired my ceiling fan. The attic wiring was very crazy. He did an outstanding job figuring it out and fixing the…”

  • “I called other before I call ABC and was giving long wait and schedule time to come out and check the heating system. So I received a message on the web about ABC Plumbing and Heating. So I called the company right away and they said what time would you…”

  • “I am so impressed with Chris and ABC Plumbing, Heating, Cooling. His friendliness honest approach to his Job is remarkable. Thanks Chris for making my day and believing that they are still great honorable people out there.”

  • “Paul B. serviced my furnace yesterday with an inspection and cleaning. He didn't stop there though, I had purchased a new filter for my humidifier on the furnace and he replaced that for me, showed me how to do it in the future and explained how to adjust the humidity…”

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