Honeywell HPA300 Replacement Filter: How Often & What to Buy
The Honeywell HPA300 uses "Filter R" (HRF-R1, sold as a 2-pack) as its True HEPA replacement filter. Honeywell recommends replacing it about once a year with typical use — noticeably weaker airflow or a musty smell from the unit are both signs it's overdue sooner than that.
Filter R is sold in 1-pack and 2-pack sizes; buying the 2-pack lowers the effective cost per replacement since you're not paying for separate packaging and shipping twice. Honeywell HPA300 Replacement Filter R
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Compatible with
- Honeywell HPA300, HPA200