If it’s time to buy a new furnace, you better know what you’re doing.
First of all, a furnace is a huge investment. It is something that you need to be able to count on for the next 10 years. No one likes trying to get their furnace replaced in the dead of Winter. It is important to know any-and-everything you can before choosing the proper unit for your home.
What is AFUE and why does it matter?
AFUE stands for Annual Fuel Utilization Efficiency. AFUE is a measurement of the amount of heat an appliance produces in relation to how much energy it consumes in a year. The Federal Trade Commission (FTC) requires all new furnaces and boilers to display their AFUE ratings on a highly visible label so that consumers can easily compare the energy-efficiency of different units.
An AFUE percentage is a calculation of heat produced over energy consumed. A furnace that has an 85% AFUE rating, for example, can turn 85 percent of the energy it consumes into heat. The rest is lost in process.
- Federal Trade Commission
The current minimum AFUE rating allowed for new furnaces is 78%. According to the Environmental Protection Agency (EPA), a middle-grade unit has an AFUE rating around 80%, while a high-efficiency unit has a rating between 90% and 97%
- Environmental Protection Agency
Benefits of a high-efficiency furnace.
High-efficiency furnaces devour tremendously less energy than low-efficiency units. Over the years they will save you a great deal of money on your energy bills. High-efficiency furnaces leave a smaller carbon footprint than less efficient units.
The only disadvantage of high-efficiency furnaces is that the upfront cost can cause a bit of a sticker-shock. In places the Nashville with mild climates, it will take longer to see your ROI than they do in Milwaukee. If you happen to upgrade from an old furnace with a very low AFUE rating, the ROI will be seen almost immediately.
NOTE: Buyer beware. There have been many instances where companies have stretched their AFUE rating and later been in trouble with the FTC. Do your research and trust your local HVAC technician to give you recommendations.