Blueair Blue Pure 311i Max
#3 in Large roomsFull review
A mid-size, efficient purifier with app control for bedrooms and living rooms up to about 440 sq ft.
Amazon $229$229
The Blueair Blue Pure 311i Max is the better air purifier overall, rated 3.8 to 3.4. The Blueair Blue Pure 311i Max leads on auto mode. The Blueair Blue Pure 311i Max costs $5.95 less ($229 vs $234.95).
Honeywell HPA300
#10 in Large roomsFull review
A proven, no-frills large-room HEPA purifier for anyone who wants high certified CADR without an app.
Amazon $234.95$234.95
Prices were last checked October 22, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Which should you buy?
- Choose the Blueair Blue Pure 311i Max for auto mode (particle sensor and Wi-Fi app vs no air-quality sensor or app).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every large rooms air purifier; a clear win is highlighted. How we rank explains each one.
| Factor weight | Blueair Blue Pure 311i Max | Honeywell HPA300 |
|---|---|---|
| Overall rating | 3.8/5 | 3.4/5 |
| Value 25% | 69 $0.81 per cfm of smoke CADR | 71 $0.78 per cfm of smoke CADR |
| Filter cost 20% | 69 $89.98 a year in filters | 74 $84.99 a year in filters |
| Quiet 20% | 67 50 dB at top speed (maker rating) | 50 noise at top speed not published (neutral score used) |
| Efficiency 15% | 80 8.4 cfm per watt | 50 efficiency not certified (neutral score used) |
| Auto mode 10% | 100 particle sensor and Wi-Fi app | 0 no air-quality sensor or app |
| Warranty 10% | 0 1-year warranty | 50 warranty not published (neutral score used) |
Independent measurements
Blueair Blue Pure 311i Max
No independent test published yet.
Honeywell HPA300
| 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
| Blueair Blue Pure 311i Max | Honeywell HPA300 | |
|---|---|---|
| Performance | ||
| Smoke CADR | 283 cfm | 300 cfm |
| Dust CADR | 314 cfm | 320 cfm |
| Pollen CADR | 365 cfm | 300 cfm |
| PM2.5 CADR | 298 cfm | - |
| CADR certified by | AHAM Verifide | AHAM Verifide |
| Room size (AHAM) | 439 sq ft | 465 sq ft |
| Coverage (maker) | 2,107 sq ft | 2,250 sq ft |
| Noise | 23 to 50 dB | - |
| Efficiency | ||
| Efficiency (IEF) | 8.4 cfm/W | - |
| ENERGY STAR | Yes | No |
| Energy use | 193 kWh/year | - |
| Power at top speed | 32 W | - |
| Filters | ||
| Filter | HEPASilent particle filter with washable fabric pre-filter | HEPA (3 R filters) with carbon pre-filter A |
| Activated carbon | - | Yes |
| Replacement | F3MAX (110037) | HRF-ARVP300 (3 HEPA R + 4 pre-filter A) |
| Replacement cost | $44.99 every 6 months | $84.99 every 12 months |
| Yearly filter cost | $89.98/year | $84.99/year |
| Ionizer | - | No |
| CARB certified (ozone) | Yes | Yes |
| Controls and build | ||
| Air-quality sensor | particle | None |
| Auto mode | Yes | No |
| Wi-Fi app | Yes | No |
| Fan speeds | 4 | 4 |
| Dimensions | 19 x 12.5 x 12.5 in | 22.32 x 20.08 x 10.83 in |
| Weight | 7.8 lb | 17 lb |
| Warranty | 1 years | - |