What do HVAC ratings mean?

Technology

When you’re searching for a new HVAC system, there are a lot of factors to think about. Is it the appropriate size for your home? Will it be energy efficient? How does the system work with your finances? Will the HVAC system be quiet enough for your home? What kind of air quality can you expect? You have a lot to think about when considering the best solution. On top of all the inquiries you have, some HVAC knowledge seems just out of reach. The acronyms and shorthand that industry professionals use can raise more questions for the average homeowner. Lucky for you, the experts at KDM Service Corporation are breaking down the system ratings to provide more education as you head into the purchasing process:

Annualized Fuel Utilization Efficiency (AFUE): This efficiency rating is a ratio that links how much of the fuel you use in your furnace to the amount turned into useable heat. A better system will have a higher percentage of heat used.

If your system has an AFUE rating of 85, that means the system makes 85 percent of the fuel used into useable heat. Systems that are highly efficient have an AFUE of 90 or higher. Lennox offers residential furnaces with ratings up to 98.7—the highest in the industry.

Seasonal Energy Efficiency Ratio (SEER): The SEER rating is used to measure both heat pumps and air conditioners. Much like AFUE, this ratio looks at how much of the fuel used to power a heating and cooling system is converted to cooling output. The higher the SEER rating, the more efficient your system is operating.

Minimum SEER ratings vary between regions. High efficiency models are generally more expensive, but they provide more energy savings. Lennox makes air conditioners with SEER ratings up to 26—another industry leading rating.

Heating Seasonal Performance Factor (HSPF): Have a heat pump? This is the rating to keep in mind. The higher your heat pump is rated, the more efficient it is. If you want a model that’s ENERGY STAR® efficient, then look for a model with a rating above an 8.2—as well as a SEER rating above 12.

Minimum Efficiency Reporting Value (MERV): Air filters have holes that let air and particles to move through your home. MERV measures the size of the holes. The higher the rating, the smaller the holes in the filter—and the fewer debris particles that enter into your home. If you’re seeking a more efficient filter, find one with a MERV rating of 10 or higher.

Air filters are essential to keeping the air in your home clean and comfortable. Make sure to find the rating that works with your home, with your system and change the filter on a consistent basis.

Keeping these ratings in mind as you begin looking for a new system will help ensure you find one that meets your needs and will work with your home. If you’re ready to find the answer for your home comfort, or you have more questions about system ratings, call the experts at KDM Service Corporation. You can reach us at 205-758-2703 We’re here to answer your questions and get you on the path to home comfort.

Back To Blog