Holmes HAPF21-U4 Air Purifier Hepa Filter 4 Pack
Item #: HL-HAPF21-4PK
MPN #: HAPF21-U4
UPC #: 744539069687
Weight: 3 lbs
Holmes HAPF21-U4 Air Purifier Hepa Filter 4 Pack. The Holmes HAPF21 Replacement Filter is the main HEPA filter in Holmes models HAP222, HAP221, HAP220, HAP223, and HAP2234. Also known as part number HAPF21CS. Filter should be replaced every 1-2 months for optimum performance.