Check the listing for details. Filters Fast Brand Air Filter Replacement For Hunter 30931 HEPAtech. Color: White, Condition: New. Listed at 19.95 USD. The FiltersFast Brand 30931 is a compatible replacement filter for the following HEPAtech air purifier models: Hunter 30212 Hunter 30213 Hunter 30240 Hunter 30241 Hunter 30251 Hunter 30378 Hunter 30379 Hunter 30381 Hunter 30382Hunter 30383Hunter 30526Hunter 30527Hunter 30528Hunter 37027 For use with QuietFlo models: 30058 30210 30214 30215 30216 30225 30241 30244 30245 30255 30260 30398 30401 30402 30525 36260 36395 37225 37251 37255 The FF 30931 compatible HEPAtech air filter is a compatible version of the Hunter 30931 HEPAtech Purifier Filter. This FiltersFast Brand air filter captures approximately 99.97% of airborne pollutants as small as 0.1 microns. This FiltersFast Brand HEPA filter is made of electrostatically charged material. This FiltersFast Brand air filter replacement captures airborne allergens such as dust mites, pollen, smoke, pet dander, dust and mold spores. FF 30931 compatible HEPAtech air filter specifications: Approximate Dimensions: 16" x 14" x 1-1/4"Captures airborne pollutants Replace every 4 to 6 months depending on usage Compatible with HEPAtech Air Purifies (listed above) Depending on continuous filter usage, you should replace your FiltersFast Brand filter every 4 to 6 months. Disclaimer: The FiltersFast FF 30931 Compatible is a NON-Hunter aftermarket filter product. Party has no affiliation with HUNTER. Party's NON- Hunter aftermarket filter products are not authorized or licensed by HUNTER. The air filters sold by the Party are generic products designed and engineered by the Party or its designee. Party's air filter products are not designed or engineered by HUNTER. Party's NON branded Air filter products are not covered under any manufacturer�s warranty. Their use by the consumer will void the product warranty made by HUNTER.