What is a Merv 8 Filter and How Does it Work?

MERV 8 filters are 90 percent efficient on particles that are 3 to 10 microns in size. They are classified as such by the National Air Filtration Association (NAFA) and must filter at least 70% of E3 particles (3.0-10.0 µm) and 20% of E2 particles (1.0-3.0 µm). In addition, they also filter 30% of E2 particles and 1.9% of E1 particles (0.3-1.0 µm).Merv 1 to 4 filters are effective for controlling larger particles, such as sanding dust, spray paint dust, lint and carpet fibers, and are applicable in residential and window air conditioning units. After performing standard dust tests, Essential was found to have a stop rate of 81.5%, meaning that 81.5% of the dust particles introduced into the filter were successfully filtered out of the air. A MERV 8 filter is considered a superior filtration compared to air filters with a lower MERV rating, as it is able to trap pollen, dust, dust mites and mold spores.

It is commonly used in homes, commercial buildings, paint booths, and industrial workplaces. However, if you are concerned about outdoor air pollution, family members with respiratory problems or pets in the house, then a higher merv rating might be a good idea. In many cases, a MERV 8 air filter is more than adequate; however, in operating rooms and other spaces where absolute cleanliness is required, filters with a MERV rating of 17 to 20 are used. When used in a multi-filter system, pre-filters trap dirt and large particles before air reaches the final filters downstream, removing the smallest particles. All air filters require regular cleaning and filter replacement to function properly; follow manufacturer's recommendations for maintenance and replacement. MERV 8 air filters are almost as affordable as less efficient products, making them good value for money. A MERV 11 air filter may need to be changed a little more frequently than a MERV 8 air filter; however, if you prioritize a healthy home or have respiratory problems such as asthma, then a MERV 13 is a great option. Finer particles will have no problem passing through a fiberglass filter, and those that are larger will filter less effectively than with a pleated filter.