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 and the Dreo Macro Max AS are evenly matched, rated 3.8 and 3.8. The Blueair Blue Pure 311i Max leads on efficiency. The Dreo Macro Max AS wins on value. The Dreo Macro Max AS costs $69.01 less ($159.99 vs $229).
Dreo Macro Max AS
#4 in Large roomsFull review
A strong-value smart purifier for large rooms up to about 450 sq ft.
Amazon $159.99$159.99
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 6.2 cfm per watt).
- Choose the Dreo Macro Max AS for value ($0.54 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 | Dreo Macro Max AS |
|---|---|---|
| Overall rating | 3.8/5 | 3.8/5 |
| Value 25% | 69 $0.81 per cfm of smoke CADR | 92 $0.54 per cfm of smoke CADR |
| Filter cost 20% | 69 $89.98 a year in filters | 75 $79.98 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 | 52 6.2 cfm per watt |
| Auto mode 10% | 100 particle sensor and Wi-Fi app | 100 PM2.5 sensor and Wi-Fi app |
| Warranty 10% | 0 1-year warranty | 0 1-year warranty |
Specifications
| Blueair Blue Pure 311i Max | Dreo Macro Max AS | |
|---|---|---|
| Performance | ||
| Smoke CADR | 283 cfm | 294 cfm |
| Dust CADR | 314 cfm | 306 cfm |
| Pollen CADR | 365 cfm | 336 cfm |
| PM2.5 CADR | 298 cfm | 300 cfm |
| CADR certified by | AHAM Verifide | AHAM Verifide |
| Room size (AHAM) | 439 sq ft | 456 sq ft |
| Coverage (maker) | 2,107 sq ft | 2,187 sq ft |
| Noise | 23 to 50 dB | 19 dB |
| Efficiency | ||
| Efficiency (IEF) | 8.4 cfm/W | 6.2 cfm/W |
| ENERGY STAR | Yes | No |
| Energy use | 193 kWh/year | 282 kWh/year |
| Power at top speed | 32 W | - |
| Filters | ||
| Filter | HEPASilent particle filter with washable fabric pre-filter | 3-in-1 high-efficiency (HEPA-grade) filter with carbon layer and washable pre-filter |
| Activated carbon | - | Yes |
| Replacement | F3MAX (110037) | DR-HPA044 |
| Replacement cost | $44.99 every 6 months | $39.99 every 6 months |
| Yearly filter cost | $89.98/year | $79.98/year |
| Ionizer | - | No |
| CARB certified (ozone) | Yes | Yes |
| Controls and build | ||
| Air-quality sensor | particle | PM2.5 |
| Auto mode | Yes | Yes |
| Wi-Fi app | Yes | Yes |
| Fan speeds | 4 | 4 |
| Dimensions | 19 x 12.5 x 12.5 in | 20.91 x 11.04 x 11.04 in |
| Weight | 7.8 lb | 12.6 lb |
| Warranty | 1 years | 1 years |