Blueair Blue Pure 311i Max
$229.00
Price checked 2026-08-24
Buy link unavailable
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Blueair Blue Pure 311i Max vs Levoit Core 400S-P
Side-by-side spec diff. Differing values highlighted; identical values dimmed. CADR and ozone rows only carry dual-sourced values. Prices as of 2026-08-24.
| Spec | Blueair Blue Pure 311i Max | Levoit Core 400S-P |
|---|---|---|
| Price | $229.00 | $189.99 |
| Availability | In Stock | In Stock |
| CADR ✓₂ | 250 cfm ✓₂ | 231 cfm ✓₂ |
| Room size | 387 ft² @4.8 ACH | 358 ft² @4.8 ACH · 1718 ft² @1 ACH |
| Filter type | HEPASilent | True HEPA |
| Filter stages | pre_washable_fabric, particle_carbon | true_hepa, activated_carbon |
| Noise | 23–50 dB | 22–52 dB |
| Ozone status ✓₂ | CARB-certified (Electronic) — list entry Blue Pure 311i Max, model code 3332111100, certified 2023-03-09, approval G-23-050; Blueair's product page makes no additional ozone statement. | CARB-certified (Mechanical) — list entry Core 400S, certified 2021-05-07, approval G-21-166; Levoit's product page makes no additional ozone statement. |
| App / ecosystem | blueair_app, alexa, google | vesync, alexa, google |
| Sensors | PM2.5/air-quality | PM2.5/air-quality |
| Auto mode | Yes | Yes |
| Humidifier combo | No | No |
Levoit Core 400S-P
$189.99
Price checked 2026-08-24
Buy link unavailable
Fail-closed pending verified Associates tag.
Independent comparison. Prices are point-in-time scrapes from Amazon.com listings, not offers. CADR figures render only where two independent sources agree; ozone status is checked against the California Air Resources Board certified-device list. No health claims beyond manufacturer documentation.