Compatible with most Guardian Technologies AC5000 series 3-in-1 air cleaning systems; photocatalyst and charcoal filter; HEPA and Pet Pure treatment

The True HEPA Replacement Filter for the MetaAir Air Purifier capture at least 99.97% of airborne particles 0.3 microns in size, so you can enjoy fresh air even longer. Featuring greater adsorption and a honeycomb structure, the improved filters cover a larger surface area. To do its best work, Levoit recommends replacing the filter every 6-8 months - the filter may need to be replaced sooner or later depending on the air quality in your area. Compatible with H133 series. Remember to remove the filter’s plastic packaging before placing it into the air purifier