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

The Blueair Blue Pure 311i Max wins on certified airflow, with 283 CFM for 439 sq ft, on sensing with PM1, PM2.5 and PM10, and on its washable pre-filter. The Levoit Core 400S-P wins on price, warranty and Home Assistant support, at 231 CFM for 358 sq ft.

Certified performance. The Blueair Blue Pure 311i Max is AHAM Verifide at 283 CFM for 439 sq ft and reports three particle sizes, while the Levoit Core 400S-P is rated at 231 CFM for 358 sq ft and reports PM2.5 only.

The Blueair Blue Pure 311i Max uses HEPASilent filtration behind a washable fabric pre-filter, with the main filter rated around nine months. The Levoit Core 400S-P uses a sealed 3-in-1 H13 True HEPA cartridge rated around eight months, whose pre-filter is vacuumed rather than washed.

Neither supports Apple HomeKit or Matter. The Levoit Core 400S-P works with Alexa and Google Home and adds Home Assistant through the VeSync integration. The Blueair Blue Pure 311i Max works with Alexa and Google Home only, with no official Home Assistant integration.

Neither. Both sense particles only, with no VOC, CO2 or formaldehyde readings. The Blueair Blue Pure 311i Max reports PM1, PM2.5 and PM10, while the Levoit Core 400S-P reports PM2.5, and both use that reading to drive their auto mode.

Buyers who want a well-rounded large-room purifier with a two-year warranty, child lock and Home Assistant support at a lower price, and who accept a smaller certified room size than the Blueair Blue Pure 311i Max.