Clean air circulation should always be a priority for your home or commercial building. Air filters help heating and cooling systems capture dust, pet dander, and other debris, and they keep the impurities from collecting inside ducts and other distribution channels. When the device becomes clogged, air flow becomes restricted. While there are different types of air filters, knowing their Minimum Efficiency Reporting Value (MERV) is essential for how effective they are at collecting pollutants. Here is what you need to know about the rating and the best ranges.  

What Is MERV?

The rating was established in 1987 by the American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE) to measure how effective air filters are at stopping dust and debris from circulating inside homes and commercial buildings. The MERV rating scale ranges from one to 20. The higher the rating, the fewer particles that are distributed into the air. 

What Is the Best Range?


Most heating and cooling system contractors say the ideal MERV range is between eight and 13. Air filters within these levels are typically able to help prevent dust mites, pet dander, mold spores, pollen, bacteria, and saliva droplets from contaminating the air. For home interiors, five to eight is a good MERV recommendation because the air filters are generally strong enough to eliminate many common impurities. 

If you prefer a filter with a rating closer to 13, consult with an HVAC specialist to determine if your residential or commercial property heating and cooling system can handle the filter's strength. Filters over the 13 mark are typically recommended for commercial buildings such as medical facilities because their HVAC systems can generally accommodate stronger filtration levels.  


If you're unsure about which air filter and MERV rating is best, Superior Residential Services in Archdale, NC, will gladly provide customized guidance. The licensed, insured, and bonded heating and HVAC contractor has extensive experience in installing and repairing a variety of heating and cooling systems. You can count on the team of technicians to help you select an air filter that will provide reliable and efficient removal of contaminants. To learn more and receive a no-obligation estimate, call (336) 861-5911. You can also go online for the company's full lineup of services, including 24/7 emergency care.