Blueair Blue Pure 311i Max vs Levoit Core 400S-P

Levoit Core 400S-P edges it thanks to a 2 year warranty, Home Assistant support and a lower price, on an AHAM Verifide 231 CFM smoke CADR. Blueair Blue Pure 311i Max is ahead on airflow at 283 CFM for 439 sq ft, on sensing with PM1, PM2.5 and PM10, and on power draw.

Blueair Blue Pure 311i Max uses HEPASilent electrostatic and mechanical filtration behind a washable fabric pre-filter, with the main particle and carbon filter rated at 9 months. Levoit Core 400S-P uses a sealed 3-in-1 H13 True HEPA cartridge rated at about 8 months, whose pre-filter layer is vacuumed rather than washed.

Levoit Core 400S-P, via the VeSync integration, which exposes fan control, air quality and filter life to a local dashboard. Blueair Blue Pure 311i Max has no official Home Assistant integration and covers Alexa and Google Home only. Neither is HomeKit certified or Matter listed.

Blueair Blue Pure 311i Max, at 7.8 W against 38 W, and both carry Energy Star certification. For a purifier that is meant to run all day, that is the biggest ownership difference between them, even before the Blueair's higher certified airflow is taken into account.

Blueair Blue Pure 311i Max, which separates PM1, PM2.5 and PM10 on its display and in the app. Levoit Core 400S-P shows PM2.5 on an LED display driven by its AirSight Plus laser sensor, which owners describe as very quick to react to cooking, but it is one number rather than three.

Buyers who want a well-rounded large-room purifier with a 2 year warranty, child lock, a 24 dB sleep mode and Home Assistant support, at a lower price. If you would rather have the higher certified CADR, a washable pre-filter and a 7.8 W draw, Blueair Blue Pure 311i Max is the alternative.