Febreze Hoover Twin Chamber Replacement Vacuum Filter Works with: Hoover EmPower, Savvy, WindTunnel Bagless Uprights with Twin Chamber System Febreze Vacuum Filter - Eliminates Odors and Freshens as you Vacuum! Premium allergen filtration Did you know that your vacuum has filters that should be checked frequently? Depending on your household, it is recommended that you replace your vacuum filters every 3 to 6 months. Refer to your BISSELL vacuum owners manual for replacement instructions.