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The H40 is a compatible replacement for the Holmes HAPF-40 HEPA Air Filter Replacement. This HEPA media filter is compatible with the HAP-300 and HAP3004 and replaces the HAPF40CS, HAPF-40, H40H-40, and H40.
This air filter replacement helps your air purifier achieve its intended operational output. With a HEPA (high efficiency particulate absorbing) filter you will receive high efficiency and durability, while also removing allergens from the air.