Head to head

Levoit Core 400S vs Blueair Blue Pure 211+ Auto

Blueair Blue Pure 211+ Auto leads 4 to 1 on the 5 rankable specs, but Levoit Core 400S costs $120 less.

Catalog as of September 1, 2026

Why, in numbers

CADR: Levoit Core 400S lists 260 CFM / 442 m³/h (Smoke), 260 CFM (Dust), 260 CFM (Pollen) (Levoit sheet, 2026-09-02); Blueair Blue Pure 211+ Auto lists 353 CFM (Smoke), 347 CFM (Dust), 380 CFM (Pollen) (Blueair sheet, 2026-09-02).
Coverage area: Levoit Core 400S lists 403 sq ft (5 air changes/hr) / 990 sq ft (2 air changes/hr) (Levoit sheet, 2026-09-02); Blueair Blue Pure 211+ Auto lists 550 sq ft (4.8 air changes/hr) / 1,320 sq ft (2 air changes/hr) (Blueair sheet, 2026-09-02).
Room size: Levoit Core 400S lists Bedrooms, apartments, mid-size living spaces (Levoit sheet, 2026-09-02); Blueair Blue Pure 211+ Auto lists Large living rooms, open floor plans, master suites (Blueair sheet, 2026-09-02).
Filter types: Levoit Core 400S lists 3-Stage: Nylon Pre-filter + H13 True HEPA + High-Efficiency Activated Carbon (Levoit sheet, 2026-09-02); Blueair Blue Pure 211+ Auto lists Washable fabric pre-filter + HEPASilent main filter (Particle + Carbon) (Blueair sheet, 2026-09-02).
Filter life: Levoit Core 400S lists 6–12 months (Levoit sheet, 2026-09-02); Blueair Blue Pure 211+ Auto lists 6 months (Blueair sheet, 2026-09-02).

Manufacturer list price, not a live offer. Confirm current pricing before you buy.

Levoit Core 400S

$2191 spec win

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Blueair Blue Pure 211+ Auto

$3394 spec wins

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Buying for

Every rankable spec counts once. Pick a lens to score only what matters for your air purifier.

Straight answer

Overall: 1 to 4

Buy the Blueair Blue Pure 211+ Auto.

Leads 4 of 5 rankable overall specs; Levoit Core 400S takes 1.
CADR: 353 CFM vs 260 CFM / 442 m³/h
Coverage area: 550 sq ft vs 403 sq ft
Levoit Core 400S is $120 cheaper. Pay the difference only if cadr matters to you.

Check first: the Blueair Blue Pure 211+ Auto has no Wi-Fi app. the Blueair Blue Pure 211+ Auto has over 55 dB on high. Tick them under deal-breakers if that rules it out.

1 Levoit Core 400S5 rankable of 11 specsBlueair Blue Pure 211+ Auto 4

Deal-breakers

tick what would make you walk away

No Wi-Fi approw
No schedules or remote control from your phone.
Clear:Levoit Core 400S · VeSync Wi-Fi App, Amazon Alexa, Google…Trips:Blueair Blue Pure 211+ Auto · One-touch Auto Mode
Over 55 dB on highrow
Louder than normal conversation at full speed.
Clear:Levoit Core 400S · 24 dB (Sleep mode) – 52 dB (High mode)Trips:Blueair Blue Pure 211+ Auto · 23 dB (Low) – 56 dB (Turbo high)
Under 1,000 sq ft coveragerow
Undersized for an open-plan living area.
Trips:Levoit Core 400S · 403 sq ftTrips:Blueair Blue Pure 211+ Auto · 550 sq ft

At a glance

The handful of numbers that decide most purchases in this category.

2 of 2 differ

CADR

Levoit

260 CFM / 442 m³/h (Smoke), 260 CFM (Dust), 260 CFM (Pollen)

Blueair

353 CFM (Smoke), 347 CFM (Dust), 380 CFM (Pollen)

Coverage area

Levoit

403 sq ft (5 air changes/hr) / 990 sq ft (2 air changes/hr)

Blueair

550 sq ft (4.8 air changes/hr) / 1,320 sq ft (2 air changes/hr)

True 3-Year Cost of Ownership (TCO)

Upfront price + 3 years of consumables, fees & essential add-ons

Levoit Core 400S

Upfront list price$219

3-Yr H13 True HEPA filter (Every 12 months (~$45/yr))+$135

3-Year Estimated Total$354

Blueair Blue Pure 211+ Auto

Upfront list price$339

3-Yr Foldable Particle+Carbon filter (Every 6 months (~$45/yr))+$135

3-Year Estimated Total$474

Room Placement & Bedroom Noise Check

Physical clearance required for airflow, wall placement, and bedroom noise levels.

Ergonomic & Spatial Check

Wall Clearance Required

Cylindrical 360° filters cannot sit flush against walls without choking intake.

Levoit

360° intake requires 15 in perimeter clearance from walls

Blueair

Requires 12 in perimeter airflow space

Nighttime Sleep Mode Noise

Levels below 25 dB are virtually silent for light sleepers.

Levoit

24 dB quiet sleep mode

Blueair

Standard sleep speed

Unit Footprint & Dimensions

Levoit

Mid-sized cylinder (10.8 × 10.8 × 20.5 in; 11.0 lb)

Blueair

Standard room purifier footprint

The 90-Day Owner Regret Check

Documented ergonomic quirks, hardware annoyances, and maintenance realities reported by real owners.

Post-Purchase Truths

Levoit: What to watch for

Maintenance
Requires periodic filter replacements to maintain airflow and odor capture.
Activated carbon and HEPA media gradually saturate, needing replacement once or twice yearly depending on air pollution and pet shedding.

Blueair: What to watch for

Maintenance
Requires periodic filter replacements to maintain airflow and odor capture.
Activated carbon and HEPA media gradually saturate, needing replacement once or twice yearly depending on air pollution and pet shedding.

Levoit Core 400S$2191 win

Blueair Blue Pure 211+ Auto$3394 wins

Performance Filters Usability & Smart Design & Ownership

10 of 11 attributes differ. Identical rows are dimmed.

Performance

leads 2-0

Performance specifications. Middle column is Levoit Core 400S, right column is Blueair Blue Pure 211+ Auto.
CADR	260 CFM / 442 m³/h (Smoke), 260 CFM (Dust), 260 CFM (Pollen)	353 CFM (Smoke), 347 CFM (Dust), 380 CFM (Pollen) (wins this row: higher)
Room size	Bedrooms, apartments, mid-size living spaces	Large living rooms, open floor plans, master suites
Coverage area	403 sq ft (5 air changes/hr) / 990 sq ft (2 air changes/hr)	550 sq ft (4.8 air changes/hr) / 1,320 sq ft (2 air changes/hr) (wins this row: higher)

Filters

leads 1-0

Filters specifications. Middle column is Levoit Core 400S, right column is Blueair Blue Pure 211+ Auto.
Filter types	3-Stage: Nylon Pre-filter + H13 True HEPA + High-Efficiency Activated Carbon	Washable fabric pre-filter + HEPASilent main filter (Particle + Carbon)
Filter life	6–12 months (wins this row: higher)	6 months

Usability & Smart

leads 1-0

Usability & Smart specifications. Middle column is Levoit Core 400S, right column is Blueair Blue Pure 211+ Auto.
Noise levels	24 dB (Sleep mode) – 52 dB (High mode)	23 dB (Low) – 56 dB (Turbo high) (wins this row: lower)
Energy consumption	38 W max power consumption	38 W max power consumption
Smart features	VeSync Wi-Fi App, Amazon Alexa, Google Assistant voice control	One-touch Auto Mode (no Wi-Fi app)
Air quality sensors	AirSight Plus Laser Dust Sensor with PM2.5 numerical display and 4-color ring	Integrated particle sensor with 3-color air quality LED indicator

Design & Ownership

leads 1-0

Design & Ownership specifications. Middle column is Levoit Core 400S, right column is Blueair Blue Pure 211+ Auto.
Weight	14.1 lb (6.4 kg)	12.5 lb (5.7 kg) (wins this row: lower)
Warranty	2 years limited warranty	2 years (with product registration)

Most rows are from the official spec sheet. Marked rows are other published figures or our summary, not lab tests we ran.

Levoit Core 400S source Blueair Blue Pure 211+ Auto source

Which one should you buy

Pick this one if

Levoit Core 400S

Smart air purifier with H13 True HEPA filtration, AirSight Plus laser dust sensor, and VeSync app control.

Whisper-quiet 24 dB sleep mode with completely dimmable light display
AirSight Plus laser sensor provides real-time PM2.5 numerical readings
VeSync smartphone app with scheduling, filter life tracking, and voice control

What you give up

Coverage is sized for medium bedrooms and living rooms (under 1,000 sq ft)
Activated carbon layer is a coated sheet rather than heavy pellet bed

Full Levoit Core 400S specs →

Pick this one if

Blueair Blue Pure 211+ Auto

High-capacity large-room air purifier with 360-degree HEPASilent filtration and machine-washable fabric pre-filters.

High 353 CFM CADR cleans a 550 sq ft living room in just 12.5 minutes
HEPASilent electrostatic + mechanical filtration maximizes airflow and efficiency
Interchangeable washable fabric pre-filters in multiple designer colors

What you give up

No mobile app or Wi-Fi schedule controls (one-button operation)
Reaches 56 dB at highest turbo fan setting

Full Blueair Blue Pure 211+ Auto specs →

Best for each use

Bedrooms

Quiet nights: low-speed noise, sleep mode, schedules from your phone

For bedrooms, buy the Blueair Blue Pure 211+ Auto.

Leads 2 of 2 rankable bedrooms specs.
Noise levels: 23 dB vs 24 dB
Weight: 12.5 lb vs 14.1 lb
Levoit Core 400S is $120 cheaper. Pay the difference only if noise levels matters to you.

Big rooms & allergies

Open-plan rooms or allergies: CADR, coverage, filter grade

For big rooms & allergies, buy the Blueair Blue Pure 211+ Auto.

Leads 2 of 3 rankable big rooms & allergies specs; Levoit Core 400S takes 1.
CADR: 353 CFM vs 260 CFM / 442 m³/h
Coverage area: 550 sq ft vs 403 sq ft
Levoit Core 400S is $120 cheaper. Pay the difference only if cadr matters to you.

Low running cost

Cheap to own: filter life, power draw, warranty

Too close to call on low running cost from the spec sheets. Only filter life is rankable here.

Warranty: 2 years limited warranty vs 2 years

Every answer above is scored from published figures. A lens uses only the rows that matter for that use, including marked rows that are not on the official sheet. Switch lenses interactively in the panel above.

Done deciding?

Open the full standalone spec sheet for either device.

Levoit Core 400S spec sheet Blueair Blue Pure 211+ Auto spec sheet

Manufacturer pages: Levoit Core 400S ↗ · Blueair Blue Pure 211+ Auto ↗

Common questions

Which is cheaper, the Levoit Core 400S or the Blueair Blue Pure 211+ Auto?

Levoit Core 400S costs $120 less at list price.

What is the biggest catch with the Levoit Core 400S or Blueair Blue Pure 211+ Auto?

Blueair Blue Pure 211+ Auto has this deal-breaker: no Wi-Fi app. No schedules or remote control from your phone.

Which is better for bedrooms, the Levoit Core 400S or the Blueair Blue Pure 211+ Auto?

For bedrooms, buy the Blueair Blue Pure 211+ Auto. Leads 2 of 2 rankable bedrooms specs. Noise levels: 23 dB vs 24 dB

What cannot be compared from spec sheets?

Of the 11 specs tracked here, 6 are descriptive and cannot be ranked on numbers alone. Spec sheets also cannot measure subjective factors like build quality, real-world performance, or comfort.

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