What do HVAC ratings mean?

August 23, 2018

When you’re searching for a new HVAC system, you have a lot of different features to think about. Is it the correct size for your home? Is it energy efficient? Will it work with your budget? Will the HVAC system be quiet enough for your home? What kind of air quality can you expect? It can be overwhelming. On top of all the factors you want to learn more about, some HVAC knowledge seems just out of reach. The acronyms and shorthand that industry professionals may include can create questions for the average individual. Fortunately, the team at US Air Heating and Cooling 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 associates how much of the fuel you use in your furnace to the amount turned into useable heat. The higher the percentage of heat used, the better the system rating.

If your system has an AFUE rating of 85, that means the system turns 85 percent of the fuel used into useable heat. If you are looking for a highly efficient system, you’ll want one that has an AFUE of 90 or higher. Lennox has 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. A lot like AFUE, this ratio compares how much of the fuel used to power a heating and cooling system is converted to cooling output. The higher your unit’s SEER, the more efficiently it runs.

Minimum SEER ratings differ between regions. A high efficiency model that provides more energy savings in the long run will generally be a little more expensive. Lennox carries air conditioners with SEER ratings up to 26—another industry leading rating.

Heating Seasonal Performance Factor (HSPF): Looking into heat pumps? This is the rating to keep in mind. A higher rating indicates a more efficient heat pump. If you are in the market for a heat pump that’s ENERGY STAR® efficient, you’ll need a rating above an 8.2—as well as a SEER rating above 12.

Minimum Efficiency Reporting Value (MERV): Air filters have holes that allow air and particles to circulate through your home. MERV takes a look at the size of the holes. The higher the rating, the smaller the holes in the filter—and fewer particles that make their way into your home. If you’re looking for a more efficient filter, find one with a MERV rating of 10 or higher.

Air filters are critical to the quality of air in your home. Make sure to find the rating that works with your home, with your system and change the filter regularly.

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 team at US Air Heating and Cooling. You can reach us at 803-220-0761 We’ll work with you to find the best solution and get to the bottom of all your questions.