Search·Honeywell
When you already know your purifier’s model number, this page shows the replacement filter numbers we match to it—then you can compare with your old filter and shop.
Brand
Honeywell
Model HPA300
Honeywell HPA300 Air Purifier
Series: HPA300
These filter part numbers are matched to this air purifier model in our reference. Compare the part number with the label on your current filter or your owner’s manual before you buy.
Your replacement
HONEYWELL-HRF-R3
HPA300 series True HEPA R filter
Replace about every 12 months
HONEYWELL-HRF-R3 is the part shown first for model HPA300; match that part number before checkout.
Why this part
- 1 mapped replacement part option for this purifier model in our reference
- Notes available for this part
- Buying options are shown only when the product page matches this filter number. Compare it with your old filter before ordering.
Replacement filter fit for this model is based on our reference data.
Shown after BuckParts checks the product page against this filter number (2026-04-20).
All details for this part (notes, compatible models, buying options when listed)
Notes & next steps
Search again if you need a different model or part number.