AFUE and HSPF – What They Will Mean for You This Winter

Most homeowners in Trinity, TX, do whatever they can to save money on their winter heating bills. One of the easiest ways you can do this is to understand the energy efficiency ratings on your furnace, boiler or heat pump. You have probably seen some numbers and letters on your heating system and have no idea what they mean. At WA Air Conditioning, a heating and cooling company serving Trinity, TX, and the surrounding communities, we encourage you to learn as much as you can about energy efficiency.


The Annual Fuel Utilization Efficiency rating is used to determine the efficiency of gas furnaces and is expressed as a whole percentage. For example, a heating system with an AFUE of 90 percent utilizes nine-tenths of its available fuel and vents one-tenth of it outdoors. Heating units that were manufactured and installed more than 15 years have ratings as low as 60 percent. Due to concerns about inefficiency and environmental waste, the Environmental Protection Agency (EPA) issued a mandate that all newly manufactured heating equipment had to be at least 78 percent efficient. As a Bryant factory authorized dealer, WA Air Conditioning stocks new furnaces with efficiency ratings up to 98 percent.


You can determine the efficiency of a heat pump by its Heat Seasonal Performance Factor rating. Beginning in 2005, the EPA mandated that all heat pumps have a HSPF of at least 7.7. The highest rating you will see on a heat pump is 10. Scientists determine the HSPF by calculating the amount of heat produced by the unit over an entire season converted into British Thermal Units (BTU). The BTU is then divided by the total amount of electricity use of the unit expressed in watt-hours.

Is it Time to Replace Your Heating System?

If your older equipment with lower energy efficiency ratings is working fine, you probably don’t see the need to replace it. A simple way for you to determine the energy efficiency of your entire home is to schedule a home energy audit with WA Air Conditioning, Inc. Our company is part of the Energy Star Home Evaluation Program, a joint effort of the EPA and the Department of Energy (DOE).

During this appointment, we test your heating equipment along with several other items in your home to determine its overall level of energy efficiency. We then provide you with a list of recommendations for improving efficiency, saving money and helping the environment. If we advise you to replace your heating unit, we will help you evaluate the energy ratings to ensure that your new unit provides greater efficiency and comfort than your current one does.


October 16, 2013 4:56 pm