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 3.7. The Blueair Blue Pure 311i Max leads on efficiency. The Winix 5520 wins on filter cost, warranty and value. The Winix 5520 costs $49.01 less ($179.99 vs $229).
Winix 5520
#5 in Large roomsFull review
A living-room purifier with strong airflow and low filter costs at Amazon’s price. Turn PlasmaWave off if you’re sensitive to ozone.
Amazon $179.99$179.99
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 4.6 cfm per watt).
- Choose the Winix 5520 for filter cost ($47.49 a year in filters vs $89.98 a year in filters), warranty (2-year warranty vs 1-year warranty) and value ($0.71 per cfm of smoke CADR vs $0.81 per cfm of smoke CADR).
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 5520 |
|---|---|---|
| Overall rating | 3.8/5 | 3.7/5 |
| Value 25% | 69 $0.81 per cfm of smoke CADR | 77 $0.71 per cfm of smoke CADR |
| Filter cost 20% | 69 $89.98 a year in filters | 87 $47.49 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 | 32 4.6 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 5520 | |
|---|---|---|
| Performance | ||
| Smoke CADR | 283 cfm | 253 cfm |
| Dust CADR | 314 cfm | 252 cfm |
| Pollen CADR | 365 cfm | 247 cfm |
| PM2.5 CADR | 298 cfm | 252 cfm |
| CADR certified by | AHAM Verifide | AHAM Verifide |
| Room size (AHAM) | 439 sq ft | 392 sq ft |
| Coverage (maker) | 2,107 sq ft | 1,882 sq ft |
| Noise | 23 to 50 dB | 23.5 dB |
| Efficiency | ||
| Efficiency (IEF) | 8.4 cfm/W | 4.6 cfm/W |
| ENERGY STAR | Yes | No |
| Energy use | 193 kWh/year | 323 kWh/year |
| Power at top speed | 32 W | 65 W |
| Filters | ||
| Filter | HEPASilent particle filter with washable fabric pre-filter | HEPA |
| Activated carbon | - | Yes |
| Replacement | F3MAX (110037) | Filter Q (1712-0123-00) |
| Replacement cost | $44.99 every 6 months | $47.49 every 12 months |
| Yearly filter cost | $89.98/year | $47.49/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 | 22.17 x 13.59 x 8.27 in |
| Weight | 7.8 lb | 13.3 lb |
| Warranty | 1 years | 2 years |