For big living rooms and open-plan spaces where a mid-size unit can’t keep up. Smaller rooms are better served by the Core 400S.
Amazon $259.97
A proven, no-frills large-room HEPA purifier for anyone who wants high certified CADR without an app.
- 300 cfmSmoke CADR
- 465 sq ftRoom size
- $84.99/yearFilters
Price checked October 22, 2026. As an Amazon Associate we earn from qualifying purchases.
- Certified 300 CFM cleans a 465 sq ft room quickly
- Simple controls with nothing to set up
- Widely stocked, and genuine filters are easy to find
- Filters cost about $85 a year
- Loud at Turbo, near 60 dB in HouseFresh’s test
- Uses roughly 76 W at top speed, more than newer designs
- No sensor or auto mode
How it scores
The rating comes from 6 measured or published factors, each scored 0-100 against fixed reference points for its room size. How we rank explains each one.
Independent measurements
Clean air delivery and noise measured by independent reviewers.
| Tested by | CADR | Noise | Conditions |
|---|---|---|---|
| HouseFresh | - | 59.5 dB | dB at 3 ft: 43.6 / 48.8 / 53.9 / 59.5 across four speeds; 28.35-76.2 W measured; cleared a 728 cu ft room in 20 min at top speed |
Specifications
| Model number | HPA300 / HPA304 |
|---|---|
| Performance | |
| Smoke CADR | 300 cfm |
| Dust CADR | 320 cfm |
| Pollen CADR | 300 cfm |
| CADR certified by | AHAM Verifide |
| Room size (AHAM) | 465 sq ft |
| Coverage (maker) | 2,250 sq ft |
| Efficiency | |
| ENERGY STAR | No |
| Filters | |
| Filter | HEPA (3 R filters) with carbon pre-filter A |
| Activated carbon | Yes |
| Replacement | HRF-ARVP300 (3 HEPA R + 4 pre-filter A) |
| Replacement cost | $84.99 every 12 months |
| Yearly filter cost | $84.99/year |
| Ionizer | No |
| CARB certified (ozone) | Yes |
| Controls and build | |
| Air-quality sensor | None |
| Auto mode | No |
| Wi-Fi app | No |
| Fan speeds | 4 |
| Dimensions | 22.32 x 20.08 x 10.83 in |
| Weight | 17 lb |
Alternatives in this room size
An efficient round purifier for a large bedroom or living room. Check the T830 on Amazon when the T810 is out of stock.
Winix $259.99For big rooms where you want high certified airflow and low running costs without app features.
Amazon $339Compare
Compare the Honeywell HPA300 with any other air purifier →
More from Honeywell: every Honeywell product ranked.