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 3.6. The Blueair Blue Pure 311i Max leads on efficiency and value. The Winix T810 wins on warranty. The Blueair Blue Pure 311i Max costs $30.99 less ($229 vs $259.99).
Winix T810
#9 in Large roomsFull review
An efficient round purifier for a large bedroom or living room. Check the T830 on Amazon when the T810 is out of stock.
Winix $259.99$259.99
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 efficiency (8.4 cfm per watt vs 6.1 cfm per watt) and value ($0.81 per cfm of smoke CADR vs $0.96 per cfm of smoke CADR).
- Choose the Winix T810 for warranty (2-year warranty vs 1-year warranty).
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 | Winix T810 |
|---|---|---|
| Overall rating | 3.8/5 | 3.6/5 |
| Value 25% | 69 $0.81 per cfm of smoke CADR | 56 $0.96 per cfm of smoke CADR |
| Filter cost 20% | 69 $89.98 a year in filters | 75 $74.99 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 | 51 6.1 cfm per watt |
| Auto mode 10% | 100 particle sensor and Wi-Fi app | 100 particle (dual sensors) sensor and Wi-Fi app |
| Warranty 10% | 0 1-year warranty | 25 2-year warranty |
Specifications
| Blueair Blue Pure 311i Max | Winix T810 | |
|---|---|---|
| Performance | ||
| Smoke CADR | 283 cfm | 270 cfm |
| Dust CADR | 314 cfm | 272 cfm |
| Pollen CADR | 365 cfm | 277 cfm |
| PM2.5 CADR | 298 cfm | 271 cfm |
| CADR certified by | AHAM Verifide | AHAM Verifide |
| Room size (AHAM) | 439 sq ft | 418 sq ft |
| Coverage (maker) | 2,107 sq ft | 1,968 sq ft |
| Noise | 23 to 50 dB | 23.8 dB |
| Efficiency | ||
| Efficiency (IEF) | 8.4 cfm/W | 6.1 cfm/W |
| ENERGY STAR | Yes | Yes |
| Energy use | 193 kWh/year | 259 kWh/year |
| Power at top speed | 32 W | 45 W |
| Filters | ||
| Filter | HEPASilent particle filter with washable fabric pre-filter | HEPA |
| Activated carbon | - | Yes |
| Replacement | F3MAX (110037) | Filter R (1712-0118-00) |
| Replacement cost | $44.99 every 6 months | $74.99 every 12 months |
| Yearly filter cost | $89.98/year | $74.99/year |
| Ionizer | - | Yes, can be switched off |
| CARB certified (ozone) | Yes | Yes |
| Controls and build | ||
| Air-quality sensor | particle | particle (dual sensors) |
| Auto mode | Yes | Yes |
| Wi-Fi app | Yes | Yes |
| Fan speeds | 4 | 5 |
| Dimensions | 19 x 12.5 x 12.5 in | 20.4 x 11.3 x 11.3 in |
| Weight | 7.8 lb | 10.2 lb |
| Warranty | 1 years | 2 years |