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Furnace Service, AFUE and What They Mean for You in Corpus Christi

Interesting temperature changes and the desire for early spring can keep us holding out as we wait until the end of the winter season. With the unpredictable weather this time of year, it’s important to ensure 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 being familiar with the system and preparing for when it might need repair or maintenance. A furnace’s AFUE (Annual Furnace Utilization Efficiency) is an important measurement to know and can inform you what kind of effectiveness you can look for from your system. If you are unsure of your AFUE, this percentage can be clarified at your next furnace service appointment from one of our experts at McNatt Inc.

So, what does this AFUE rating indicate for you? What sorts of things should you think on with AFUE?


  • The older your furnace is, the lower its AFUE will also be. This means reduced energy efficiency paralleled to a new furnace in the winter when your system is in use.
  • Think about your AFUE percentage proportionate to money – if your AFUE is 75%, that means that for every $100 you spend on heating your home, only $75 is taken to heat your home.

Considering the age of your furnace and the potential of overspending on your heating costs has hopefully provided some perception into the weight of your furnace’s AFUE. There are many elements that go into choosing a new furnace or sticking to your furnace service plan. Over time still, smaller efficiency levels can significantly effect your energy usage, monthly bills and ease. Don’t disregard the AFUE rating of your furnace and consider it when deciding whether it’s time for furnace replacement.

If you have any further questions about furnaces, or you just want some help verifying the AFUE rating of your current furnace, give our professionals at McNatt Inc a call at 361-888-4808 or set up an appointment with us online.