The HEPA filter is the most efficient filter in your vacuum cleaner. It prevents allergens and particles as small as 0.003 microns from circulating back into your home's air. A blocked or faulty filter will reduce the suction power in your cleaner, which will cause it to use more energy. Regularly replacing the filter will ensure your vacuum is always functioning efficiently. S74 Pre Motor Filter 35600225
Fits Models: 39100083, 39100084, 39100126, 39100128, 39100129, BTH1PER001, BTH1TOU001, BTHZ16001, BTHPP16001, BTHPER16001.THEONE.