What do HVAC ratings mean?

Technology

If you are looking for a new heating and cooling system, you have a lot of different features to think about. Is it the appropriate size for your home? Is it energy efficient? Will it work with your budget? Will the HVAC system be quiet enough for your space? Will it be beneficial for your indoor air quality? You have a lot to think about when considering the best solution. On top of all the questions you have, some HVAC knowledge seems just out of reach. The acronyms and shorthand that industry professionals may include can raise more questions for the average individual. Lucky for you, the experts at C-N-O Comfort Zone 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 makes 85 percent of the fuel used into useable heat. A system with an AFUE of 90 or higher is considered high efficiency. Lennox carries residential furnaces with ratings up to 98.7—the highest in the industry.

Seasonal Energy Efficiency Ratio (SEER): This rating is used in both air conditioners and heat pumps. A lot like AFUE, this ratio compares how much of the fuel used to power an HVAC system is converted to cooling output. The higher the SEER rating, the more efficient your system is operating.

Minimum SEER ratings differ between regions. High efficiency models are generally more expensive, but they provide more energy savings. 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 are in the market for a heat pump 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 allow air and particles to flow around the house. MERV measures the size of the holes. The higher the rating, the smaller the holes in the filter—and fewer particles that get 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 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 on a consistent basis.

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 best solution, or you have more questions about system ratings, call the pros at C-N-O Comfort Zone. You can reach us at 636-578-1777 or by arranging an appointment with us online. We’re here to answer your questions and get you on the path to home comfort.

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