Home › Compare › Blueair Blue Pure 311i Max vs Blueair Blue Pure 311 Auto
Blueair Blue Pure 311i Max vs Blueair Blue Pure 311 Auto
Both are large air purifiers. Blueair Blue Pure 311i Max scores 3.6 to 3.6 on our formula. It's also the cheaper of the two, which makes this an easy call.
Rating by rating
| Rating | Blueair Blue Pure 311i Max | Blueair Blue Pure 311 Auto |
|---|---|---|
| Overall | 3.6 | 3.6 |
| Value | 3.5 | 2.5 |
| Energy efficiency | 4.0 | 5.0 |
| Quietness | 4.5 | 4.5 |
| Filter cost | 1.5 | 1.5 |
| Certified CADR | 5.0 | 5.0 |
| Features | 4.0 | 3.0 |
| Tested performance | 1.5 | 2.5 |
Spec by spec
| Spec | Blueair Blue Pure 311i Max | Blueair Blue Pure 311 Auto |
|---|---|---|
| Price (USD) | 170 | 200 |
| $ per CADR | 0.7 | 0.8 |
| Smoke CADR | 250 | 250 |
| Dust CADR | 321 | 250 |
| Pollen CADR | 250 | 250 |
| AHAM room size (sq ft) | 388 | 388 |
| Max power (W) | 36 | 30 |
| CADR per watt | 6.9 | 8.3 |
| Noise low (dB) | 23 | 24 |
| Noise high (dB) | 50 | 50 |
| Filter cost per year | $120 | $120 |
| 5-year cost | $770 | $800 |
| Carbon (lb) | 0.2 | 0.2 |
| True HEPA | Yes | Yes |
| Auto mode | Yes | Yes |
| App | Yes | No |
| AHAM Verifide | Yes | Yes |
| Energy Star | Yes | Yes |
Green marks the better figure in each row. Prices are approximate street prices.