Family or catalog listing · confirm your exact model
Honeywell HPA304 replacement filter
Documented OEM reference: 3 R HEPA filters (HRF-R3) + A pre-filter
Honeywell's official guide explicitly groups HPA300/HPA304 and lists three R HEPA filters plus one A or A+ pre-filter for this Extra Large configuration.
Honeywell official Find My Filter page ↗
Source market: US · Checked 2026-10-19. No stock, price, or seller claim is made. Fit is not filtration performance.
Other models listed for the same part
- Honeywell HPA300
One part listed for several models does not make those purifiers interchangeable.
Check the full model label in the finder →
Related guides
- How to Find Your Air Purifier Model Number
- Filter Fit vs Filtration Performance
- Air Purifier Filter Light and Reset Guide
- Clean and Replace Air Purifier Filters
Honeywell
Honeywell replacement filters by model →
Cite this page
Use this text to cite the page. The last-updated date is the date of the latest change to its content.
Filter Ledger. “US Honeywell HPA304 Replacement Filter”. https://filters.toolatlas.app/en-us/filters/honeywell-hpa304/. Last updated October 23, 2026.