What do HVAC ratings mean?

August 23, 2018

When it’s time for you to shop for a new home comfort system, you have a lot of different features to think about. Is it the right size for your home? Will it be energy efficient? Will it work with your budget? Will the system be quiet enough for your home? How will it impact the air quality? 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 already know can create questions for the average individual. Luckily, the team at Watts Electric & A/C Inc are breaking down the system ratings you need to know before making a purchase:

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. You’ll find that the better systems have a higher percentage of heat used.

If your system has an AFUE rating of 85, that means the system converts 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 carries 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. Similar to AFUE, this ratio looks at how much of the fuel used to power a home comfort system is converted to cooling output. A more efficient system will have a higher SEER rating.

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

Heating Seasonal Performance Factor (HSPF): Do you own a heat pump or plan to shop for one? This is the heating efficiency rating you need to know. You’ll want to look for heat pumps with a higher rating if efficiency is your goal. If you want a model that’s ENERGY STAR® efficient, that requires 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 flow around the house. MERV takes a look at 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 looking for a more efficient filter, find one with a MERV rating of 10 or higher.

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

These ratings will be important as you search for a solution that meets your needs. If you’re ready to find the model that will work for you, or you have more questions about system ratings, call the pros at Watts Electric & A/C Inc. You can reach us at 601-736-7362 We’re happy to answer any questions you have and show you options that can work for your home.