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The Holmes APF-4 is the correct foam air cleaner Pre-filter for the following air purifier systems:
The Holmes Foam Air Cleaner Prefilter APF-4 2 PACK is used to remove contaminants and large particles from the air with Holmes HAP290 and Holmes HAP475 Air Purifiers. Also known as Holmes APF4, this foam carbon pre-filter helps extend the life of the HEPA carbon filter and arrives an a convenient 2 pack.
Holmes Foam Air Cleaner Prefilter APF-4 2 PACK specifications:
The Holmes Air Cleaner/Ionizer offers three speeds, in addition to an ionizer function that can be turned off or on. The Holmes air purifier system filters the air in a 10' x 14' room in approximately ten minutes. The Holmes air purifier also is very effective at reducing airborne particulates, odors, allergens and pathogens.