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 Truclean 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 H131S series.