Review on High-Efficiency GreenR3 1-PACK HEPA Air Filters: Ideal Replacement Part for Hoover 440003905 Vacuum Cleaners by Stacy Harris

Many Hoover compatible HEPA filters available - Original part not found. Too bad they don't exist anymore. This works fine. Now that I understand the flow of the vacuum, I understand why ours stopped sucking well. You can clean the main filter (top of canister) with water, but let it dry until it's REALLY dry, which can take over 24 hours. Located at the bottom of the canister, the HEPA filter is the last thing air goes through before entering your room. You want the air to be CLEAN.