9% OFF
$319.99
$349.99
Updated October 2026
Data from the official Blueair and Levoit sites.
2026 verdict
Raw airflow against a lower bill and better integration, and the Levoit Core 400S-P wins for most rooms.
It is the cheaper of the pair, is the better reviewed, and carries a two-year warranty, while still matching the Blueair Blue Pure 211i Max on the essentials: an AHAM Verifide CADR, Energy Star certification, an ozone-free design, a responsive auto mode and Alexa and Google Home, plus Home Assistant through VeSync. The Blueair Blue Pure 211i Max is the bigger instrument, with a 435 CFM smoke CADR for large open-plan spaces and separate PM1, PM2.5 and PM10 readings where the Levoit reads PM2.5 only. Choose the Levoit Core 400S-P for a normal living room or bedroom, and the Blueair Blue Pure 211i Max when the space is large enough to need the extra airflow.
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| Feature | Blueair Blue Pure 211i Max | Levoit Core 400S-P | Winner |
|---|---|---|---|
| Price | $319.99 | $219.99 | Levoit Core 400S-P |
| Rating | 4.4 | 4.6 | Levoit Core 400S-P |
| Warranty | 1 year | 2 years | Levoit Core 400S-P |
| Connectivity | 2.4 GHz WiFi, Bluetooth | 2.4 GHz WiFi | Blueair Blue Pure 211i Max |
| Filtration | HEPA Filter, Activated Carbon Filter, Washable Pre-Filter | HEPA Filter, Activated Carbon Filter | Blueair Blue Pure 211i Max |
| Sensors | PM1, PM2.5, PM10 | PM2.5 | Blueair Blue Pure 211i Max |
| Integrations | Google Home, Alexa | Google Home, Alexa, Home Assistant | Tie |
| AHAM Verifide | YES | YES | Tie |
| Auto Mode | YES | YES | Tie |
What the differences mean
Airflow and coverage
The Blueair Blue Pure 211i Max is built for large spaces, with a 435 CFM smoke CADR for about 674 sq ft. The Levoit Core 400S-P is rated at 231 CFM for 358 sq ft, enough for a typical living room but not an open-plan floor.
Particle reporting
The Blueair Blue Pure 211i Max reports PM1, PM2.5 and PM10 separately on the unit and in the app. The Levoit Core 400S-P reads PM2.5 only, so it gives one number rather than three.
The pre-filter
The Blueair Blue Pure 211i Max has a washable fabric pre-filter in front of a particle and carbon filter rated up to 9 months. The Levoit Core 400S-P seals its pre-filter into the 3-in-1 cartridge, so it is vacuumed rather than washed and the whole filter is replaced about every 8 months.
Home Assistant
The Levoit Core 400S-P reaches Home Assistant through the VeSync integration, exposing fan control, air quality and filter life. The Blueair Blue Pure 211i Max has no official Home Assistant integration and works with Alexa and Google Home only.
Warranty and running cost
The Levoit Core 400S-P carries a two-year warranty against one year on the Blueair Blue Pure 211i Max. Both are Energy Star certified, though the Blueair draws 46 W against 38 W on the Levoit at full output.
Filter certification
The Levoit Core 400S-P uses a certified H13 True HEPA filter. The Blueair Blue Pure 211i Max uses HEPASilent, an electrostatic and mechanical hybrid rated to 99.97% down to 0.1 micron, which is how it moves more air while staying quiet rather than a certified HEPA membrane.
Which one to buy if
- you are cleaning a large open-plan living area
The Blueair Blue Pure 211i Max moves 435 CFM and is rated for about 674 sq ft, where the Levoit Core 400S-P is sized for a single living room.
- you run Home Assistant
The Levoit Core 400S-P integrates through VeSync, exposing fan, air quality and filter life; the Blueair Blue Pure 211i Max has no official Home Assistant path.
- you want particulate data broken into sizes
The Blueair Blue Pure 211i Max reports PM1, PM2.5 and PM10 separately, while the Levoit Core 400S-P shows PM2.5 alone.
- you want the longest warranty and lower price
The Levoit Core 400S-P carries a two-year warranty and is the cheaper of the pair; the Blueair Blue Pure 211i Max covers one year.
- you want a pre-filter you can rinse
The Blueair Blue Pure 211i Max has a washable fabric pre-filter; the Levoit Core 400S-P seals its pre-filter inside the cartridge.
9% OFF
$319.99
$349.99
- + Connectivity: 2.4 GHz WiFi, Bluetooth
- + Filtration: HEPA Filter, Activated Carbon Filter, Washable Pre-Filter
- + Sensors: PM1, PM2.5, PM10
- - Price: $319.99 vs $219.99
- - Rating: 4.4 vs 4.6
Winner
$219.99
- + Price: $219.99
- + Rating: 4.6
- + Warranty: 2 years
- - Connectivity: 2.4 GHz WiFi vs 2.4 GHz WiFi, Bluetooth
- - Filtration: HEPA Filter, Activated Carbon Filter vs HEPA Filter, Activated Carbon Filter, Washable Pre-Filter
What owners say
Both groups end up praising the same day-to-day things: an auto mode that reacts within seconds to cooking and dust, and low speeds quiet enough to sleep through. They notice different priorities around that. Blueair Blue Pure 211i Max owners like watching all three particle sizes spike and settle in the app, describe setup as straightforward, and several bought a second unit; their repeated complaints are the large footprint and expensive replacement filters. Levoit Core 400S-P owners call out how visibly dirty the filter becomes and how the app tracks its life, and several use it for pet dander and cooking smells; their specific gripes are that objects falling into the open top intake are hard to retrieve and a faint hum on the lowest setting at night.
Frequently Asked Questions
Which is better overall: Blueair Blue Pure 211i Max or Levoit Core 400S-P?
The Levoit Core 400S-P for most rooms, on price, a two-year warranty and Home Assistant support, while matching the Blueair Blue Pure 211i Max on certification and a responsive auto mode. The Blueair Blue Pure 211i Max is the stronger machine only when the space is large enough to need its 435 CFM and its three particle readings.
How much room does each one cover?
Both are AHAM Verifide. The Blueair Blue Pure 211i Max is rated at 435 CFM smoke CADR for about 674 sq ft, and the Levoit Core 400S-P at 231 CFM for 358 sq ft, which makes the Blueair an open-plan machine and the Levoit a large-living-room one.
Which of these works with Home Assistant?
The Levoit Core 400S-P, through the Home Assistant VeSync integration, which exposes fan control, air quality and filter life. The Blueair Blue Pure 211i Max works with Alexa and Google Home only, with no official Home Assistant integration. Neither supports Apple HomeKit or Matter.
How do the filters differ between the two?
The Blueair Blue Pure 211i Max uses HEPASilent electrostatic and mechanical filtration with a washable fabric pre-filter and a combined filter rated up to 9 months. The Levoit Core 400S-P uses a sealed 3-in-1 H13 True HEPA cartridge rated about 8 months, where the pre-filter layer is vacuumed rather than washed.
Which is quieter at night?
The Levoit Core 400S-P reaches about 24 dB in Sleep Mode with a dimmed display and peaks at 52 dB. The Blueair Blue Pure 211i Max has a Night mode with lights that can be switched off and reaches 53 dB at the top of its four speeds while moving considerably more air.
Who should buy the Blueair Blue Pure 211i Max?
Owners of large or open-plan spaces, and anyone who wants particle data split into PM1, PM2.5 and PM10 rather than a single number, and who will budget for its pricier filters and its one-year warranty.
Who should buy the Levoit Core 400S-P?
Buyers who want an AHAM Verifide purifier for a normal living room or bedroom with a real PM2.5 sensor, a quiet Sleep Mode, Home Assistant support and a two-year warranty, at a lower price than the Blueair.
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