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What is SEER Rating vs AFUE Rating? One of the most common questions we get is about all of the acronyms describing equipment. SEER that and AFUE this, what does it all mean? Here, you'll find a video explanation as well as descriptions and definitions of the terms.

What is SEER Rating vs AFUE Rating?

A SEER and AFUE Video Explanation

Product Expert
What is SEER Rating vs AFUE Rating?

One of the most common questions we get is about all of the acronyms describing equipment. SEER that and AFUE this, what does it all mean?

These letters are government ratings which are used to gauge the energy efficiency of your heating and cooling equipment.

These are real world measures, meant to represent varying conditions in weather, indoor temperatures, and system cycling.

A good rule of thumb is that SEER is cooling, AFUE is heating, and the higher the number, the greater the efficiency.



What is SEER?
Goodman GSX16

SEER stands for Seasonal Energy Efficiency Ratio. This rates the cooling process of your AC and Heat Pumps. The number represents the amount of heat removed divided by the amount of electricity used. For instance this Goodman GSX16 is rated at 16 SEER which indicates it’s a pretty good mid-range choice for common situations.

What is AFUE?
Now that you understand SEER, AFUE is the Annual Fuel Utilization Efficiency of heating equipment, such as boilers, furnaces and heating units that burn oil, gas or propane. This rating is an estimate of the energy that is converted to usable heat in real world situations. Take Goodman GMH8; it has a rating of 80% AFUE which means it pretty efficient, but if you wanted to save even more money on energy, you might want to look for something higher something in the 90-98% range like the Goodman GMEC96 with a 96% AFUE.

You May Also See EER and HSPF Ratings
What is EER?
Goodman GMH8
EER stands for Energy Efficiency Ratio, and it's a version of SEER that measures ‘steady state’ areas, such as server rooms or rooms in constant conditions, but is not a measure of general living conditions.

What is HSPF?
HSPF, or Heating Season Performance Factor, is similar to SEER and AFUE. It's a ration of heat delivered to electricity consumed in real world situations.

If you’re considering upgrading to a new heating or cooling system, higher efficiency units can start saving you money almost instantly. eComfort.com is always willing to help walk you through the selection process.

NEXT: Shop eComfort.com for More Efficient HVAC Supplies

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