What do HVAC ratings mean?

Technology

When it’s time for you to shop for a new home comfort system, there are a lot of factors to think about. Is it the appropriate size for your home? Is it energy efficient? Will it work with your budget? Will the system be quiet enough for your space? How will it impact the air quality? It can be overwhelming. 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. Luckily, the professionals at Mighty Ducts 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. A better system will 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. A system with an AFUE of 90 or higher is considered high efficiency. Lennox has residential furnaces with ratings up to 98.7—the highest in the industry.

Seasonal Energy Efficiency Ratio (SEER): Both heat pumps and air conditioners use this rating. Similar to AFUE, this ratio compares 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 differ between regions. Choosing a high efficiency model may be more expensive on the front end, but you’ll see greater energy savings throughout the years. Lennox offers 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 rating to keep in mind. A higher rating indicates a more efficient heat pump. 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 permit air and particles to flow within your indoor space. MERV assesses the size of the holes. The higher the rating, the smaller the holes in the filter—and a decrease in the number of particles that enter into your home. If you’re wanting a more efficient filter, find one with a MERV rating of 10 or higher.

Air filters are key 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 frequently.

Finding an HVAC system that fits with your home, your energy efficiency needs and your desired comfort starts with understanding ratings. If you’re ready to find the model that will work for you, or you have more questions about system ratings, call the team at Mighty Ducts. You can reach us at 714-464-3376 We’re happy to answer any questions you have and show you options that can work for your home.

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