24/7 Emergency Support

Furnace Service, AFUE and What They Mean for You in Portland

December 31, 2015

Interesting temperature changes and the expectation of early spring can let us down as we wait until the end of the cold season. With the random weather this time of year, it’s crucial to double check that your furnace service is taken care of and that your furnace is prepared for any weather shift. Part of possessing and using a furnace is knowing the system and understanding when it might need repair or maintenance. A furnace’s AFUE (Annual Furnace Utilization Efficiency) is an important measurement to know and can tell you what kind of effectiveness you can anticipate from your system. If you are not informed of your AFUE, this percentage can be determined at your next furnace tune-up appointment from one of our professionals at Three Rivers Heating & Cooling.

So, what does this AFUE rating indicate for you? What types of things should you consider with AFUE?


  • The older your furnace is, the smaller its AFUE will also be. This means less energy efficiency paralleled to a new furnace each winter when your system is in use.
  • Compare your AFUE percentage in relation to money – if your AFUE is 75%, that means that for every $100 you use heating your home, only $75 is being used to heat your home.

Bearing in mind the age of your furnace and the possibility of overspending on your heating costs has hopefully given some understanding into the significance of your furnace’s AFUE. There are many factors that go into selecting a new furnace or remaining with your furnace service plan. Over time however, decreased efficiency levels can drastically effect your energy usage, monthly bills and comfort. Don’t overlook the AFUE rating of your furnace and think of it when choosing whether it’s time for furnace replacement.

If you have any further inquiries about furnaces, or you just want some help verifying the AFUE rating of your current furnace, give our specialists at Three Rivers Heating & Cooling a call at 503-213-4433.