The Mann+Hummel MERV 8, MPR 600, FPR 5 rated air filters offer you the protection needed from dirty airborne particles, while improving the air quality in your residential or commercial properties. Inferior quality filters, unfiltered air, and insufficient change intervals all can potentially be detrimental to your HVAC system and having healthy air if left unaddressed. Being pro-active with changing your filters and by selecting an optimal filter for your setting can drastically reduce damage and wear to your air conditioning unit. Your AC or Furnace system cannot cool or heat your air unless it gets ample air flow. This is why frequent change intervals (industry standard of every three months) is highly recommended. With the MERV 8 extremely low pressure drop and high dust holding capacity, these filters are great for your utilization to supply your home or business with the air quality you wish for while optimizing the performance and longevity of your HVAC unit. Constructed from a two-piece frame provides rigidity and durability with double-wall thickness around the outer edge. The Mann Hummel air filter is made from a mechanical blend of synthetic fibers which achieves a MERV 8 rating per ASHRAE 52.2 Test Standard.