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Honeywell HAP422 air purifier hepa filter

Honeywell HAP422: the hepa filter is part HRF-C2. Source: Honeywell, checked November 6, 2026.

1HEPA filterHRF-C2

Part numbers come from Honeywell (source), checked November 6, 2026. Amazon buttons open a search for the part number; we may earn a commission.

Where the model number is

On a label on the bottom or the back of the purifier.

Other Honeywell air purifiers

HAP240HAP242HAP243HAP244HAP246HAP412HAP424HFD-120HFD-123HFD-140