Home › Compare › Blueair Blue Pure 311 Auto vs Blueair Blue Pure 311i Max
Blueair Blue Pure 311 Auto vs Blueair Blue Pure 311i Max
Both are large air purifiers. Blueair Blue Pure 311 Auto scores 3.7 to 3.7 on our formula. Blueair Blue Pure 311i Max costs $30 less, so it can still be the better buy on a tight budget.
Rating by rating
| Rating | Blueair Blue Pure 311 Auto | Blueair Blue Pure 311i Max |
|---|---|---|
| Overall | 3.7 | 3.7 |
| Value | 2.5 | 3.5 |
| Energy efficiency | 5.0 | 4.0 |
| Quietness | 4.5 | 4.5 |
| Filter cost | 1.5 | 1.5 |
| Certified CADR | 5.0 | 5.0 |
| Features | 3.0 | 4.0 |
| Tested performance | 3.5 | 2.0 |
Spec by spec
| Spec | Blueair Blue Pure 311 Auto | Blueair Blue Pure 311i Max |
|---|---|---|
| Price (USD) | 200 | 170 |
| $ per CADR | 0.8 | 0.7 |
| Smoke CADR | 250 | 250 |
| Dust CADR | 250 | 321 |
| Pollen CADR | 250 | 250 |
| AHAM room size (sq ft) | 388 | 388 |
| Max power (W) | 30 | 36 |
| CADR per watt | 8.3 | 6.9 |
| Noise low (dB) | 24 | 23 |
| Noise high (dB) | 50 | 50 |
| Filter cost per year | $120 | $120 |
| 5-year cost | $800 | $770 |
| Carbon (lb) | 0.2 | 0.2 |
| True HEPA | Yes | Yes |
| Auto mode | Yes | Yes |
| App | No | Yes |
| AHAM Verifide | Yes | Yes |
| Energy Star | Yes | Yes |
Green marks the better figure in each row. Prices are approximate street prices.