What Tells You That Your Home’s Furnace Is Energy Efficient?

How do you know if your furnace is energy efficient? Evidence that a furnace is not energy efficient may be very noticeable in the form of higher monthly gas bills even while you’re trying to keep thermostat settings lower. Energy inefficiency in winter may be the result of neglected furnace maintenance or other issues. Or, it may simply be because an aging furnace is no longer operating up to today’s higher efficiency standards. Here are some ways to know whether a furnace is energy efficient before you purchase it, as well as after it’s installed in your home.

What’s the AFUE?

Gas-furnace efficiency is rated by a metric called Annual Fuel Utilization Efficiency (AFUE). Prominently listed in any new-furnace specifications, it’s a percentage figure that represents the amount of gas consumption that generates usable heat versus the amount lost in the heating process. Adopted by the Department of Energy and expressed as a percentage, AFUE provides a quick, at-a-glance method to estimate efficiency when shopping for furnaces and space heaters.

How Does Your Furnace Rate?

AFUE ratings range from 70% upward as high as 98%. The higher the percentage, the more efficient a unit will be. Also consider these facts:

  • Generally, the higher the furnace efficiency, the lower monthly heating costs will be.
  • The range up to 70% is considered standard efficiency, while furnaces around AFUE 80% are considered mid-efficiency units.
  • High-efficiency furnaces are those with an AFUE of at least 90%.
  • High-efficiency models typically have a substantially higher upfront purchase price than standard units and may require more expensive installation.

What Else Matters?

The AFUE rating of a furnace is not the only factor that influences furnace efficiency and performance.

  • Present and future furnace efficiency is directly related to professional installation by a qualified HVAC contractor.
  • Regular annual furnace maintenance by a certified HVAC technician supports optimum energy efficiency. It’s also required to comply with terms of the manufacturer’s warranty.

Paitson Bros. pros are ready with more answers to questions about whether your furnace is energy efficient. We’ve been your hometown source for HVAC efficiency and comfort since 1922.

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    Jeff Paitson Jeff Paitson is a third generation business owner who continues to run the business with the same values that have been passed down from previous generations since 1922.

    Jeff’s belief is that the business belongs to Jesus Christ; therefore 10 percent of the company’s profits go toward the Maryland Community Church.

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    Ethan Ethan Rayburn is a lifelong resident of Terre Haute and a 2005 graduate of Purdue University.

    An Eagle Scout, Ethan spent four years as a non-profit executive with the Boy Scouts of America before joining Paitson Bros. as a comfort advisor and later General Manager. In that role, Ethan has brought a renewed enthusiasm for customer care, integrity, value, and service to Paitson Bros. Heating & Air Conditioning.

    Ethan enjoys singing and was a member of the Purdue Varsity Glee Club. He also enjoys playing and coaching soccer, spending time with his family and two young boys, and volunteering his time and resources with his church, Terre Haute First Baptist Church, which he has attended from a very young age.
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