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Air Purifiers · Head to head

Blueair Blue Pure 511i Max vs Levoit Core 400S-P

Full Smart Air Purifiers comparison in 2026

Updated September 2026
Data from Amazon and official Blueair and Levoit sites.
2026 verdict
For small rooms, the Blueair Blue Pure 511i Max edges out the Levoit Core 400S-P in this air purifier comparison, winning on price, a washable pre-filter and wider particle sensing that reads PM1, PM2.5 and PM10 instead of PM2.5 alone.
Blueair Blue Pure 511i Max
Winner
Blueair Blue Pure 511i Max
$139.00
Buy on Amazon USACheck price
The Levoit hits back with a two-year warranty against one year, stronger owner feedback and more capacity, rated at 231 CFM for 358 ft² against 153 CFM for 237 ft², plus H13 True HEPA filtration and Home Assistant support. Both run on 2.4 GHz Wi-Fi with Alexa and Google Home. Pick the Blueair Blue Pure 511i Max for a bedroom where a compact, low-maintenance unit makes sense, and the Levoit Core 400S-P for a larger room or a Home Assistant setup.
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FeatureBlueair Blue Pure 511i MaxLevoit Core 400S-PWinner
Price$139.00$189.97Blueair Blue Pure 511i Max
Rating4.54.7Levoit Core 400S-P
Warranty1 year2 yearsLevoit Core 400S-P
FiltrationHEPA Filter, Activated Carbon Filter, Washable Pre-FilterHEPA Filter, Activated Carbon FilterBlueair Blue Pure 511i Max
SensorsPM1, PM2.5, PM10PM2.5Blueair Blue Pure 511i Max
Connectivity2.4 GHz WiFi2.4 GHz WiFiTie
IntegrationsGoogle Home, AlexaGoogle Home, Alexa, Home AssistantTie
AHAM VerifideYESYESTie
Auto ModeYESYESTie

Price history compared

Every price change of both, in the same store, so the gap between the two lines is what one costs more than the other.

  • Blueair Blue Pure 511i Max
  • Levoit Core 400S-P

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Frequently Asked Questions

Which is better overall: Blueair Blue Pure 511i Max or Levoit Core 400S-P?

The Blueair Blue Pure 511i Max comes out ahead overall, thanks to a lower price, a washable pre-filter and sensors that report PM1, PM2.5 and PM10. The Levoit Core 400S-P wins on warranty and owner feedback and covers a bigger room.

What is the biggest difference between the Blueair Blue Pure 511i Max and the Levoit Core 400S-P?

Capacity and filter design. The Levoit Core 400S-P is rated at a 231 CFM smoke CADR for up to 358 ft² with an H13 True HEPA cartridge, while the Blueair Blue Pure 511i Max is rated at 153 CFM for 237 ft² with HEPASilent filtration and a washable fabric pre-filter.

Which one has the longer warranty?

The Levoit Core 400S-P carries two years, the Blueair Blue Pure 511i Max one year.

Does either work with Home Assistant?

The Levoit Core 400S-P is listed as working with Home Assistant. For the Blueair Blue Pure 511i Max that support is not documented, and neither model offers Apple Home or Matter.

Who should buy the Blueair Blue Pure 511i Max?

Buyers with a bedroom or office up to about 237 ft² who want a washable pre-filter and finer particle readings at the lower cost.

Who should buy the Levoit Core 400S-P?

Anyone with a room closer to 358 ft², who wants True HEPA, a longer warranty, an LED screen or native Home Assistant control.

Full comparison table

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