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Alen BreatheSmart 75i Large Room Air Purifier vs Levoit Core 400S

Alen BreatheSmart 75i Large Room Air Purifier leads 3 to 2 on the 5 rankable specs, but Levoit Core 400S costs $530 less.

Catalog as of September 1, 2026

Why, in numbers

  • CADR: Alen BreatheSmart 75i Large Room Air Purifier lists 350 CFM across Smoke, Dust, Pollen (Alen sheet, 2026-09-02); Levoit Core 400S lists 260 CFM / 442 m³/h (Smoke), 260 CFM (Dust), 260 CFM (Pollen) (Levoit sheet, 2026-09-02).
  • Coverage area: Alen BreatheSmart 75i Large Room Air Purifier lists 1,400 sq ft (2 air changes/hr) / 700 sq ft (4 air changes/hr) (Alen sheet, 2026-09-02); Levoit Core 400S lists 403 sq ft (5 air changes/hr) / 990 sq ft (2 air changes/hr) (Levoit sheet, 2026-09-02).
  • Room size: Alen BreatheSmart 75i Large Room Air Purifier lists Large master suites, open living rooms, offices (Alen sheet, 2026-09-02); Levoit Core 400S lists Bedrooms, apartments, mid-size living spaces (Levoit sheet, 2026-09-02).
  • Filter types: Alen BreatheSmart 75i Large Room Air Purifier lists Medical-grade H13 True HEPA + Antimicrobial layer + Heavy Odor Carbon (Alen sheet, 2026-09-02); Levoit Core 400S lists 3-Stage: Nylon Pre-filter + H13 True HEPA + High-Efficiency Activated Carbon (Levoit sheet, 2026-09-02).
  • Filter life: Alen BreatheSmart 75i Large Room Air Purifier lists 12–15 months extra long filter life (Alen sheet, 2026-09-02); Levoit Core 400S lists 6–12 months (Levoit sheet, 2026-09-02).

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

Alen BreatheSmart 75i Large Room Air Purifier
$7493 spec wins
Swap

Compare a different air purifier

Levoit Core 300S Smart True HEPA Air Purifier$149Winix 5500-2 Air Purifier$159Coway Airmega AP-1512HH Mighty$229Blueair Blue Pure 311i Max$229Honeywell HPA300 HEPA Air Purifier$249Levoit Core 600S Smart True HEPA$299Blueair Blue Pure 211+ Auto$339Coway Airmega 250$399Coway Airmega 400$549Blueair Protect 7470i$649Dyson Purifier Hot+Cool Formaldehyde HP09$799
Levoit Core 400S
$2192 spec wins
Swap

Compare a different air purifier

Levoit Core 300S Smart True HEPA Air Purifier$149Winix 5500-2 Air Purifier$159Coway Airmega AP-1512HH Mighty$229Blueair Blue Pure 311i Max$229Honeywell HPA300 HEPA Air Purifier$249Levoit Core 600S Smart True HEPA$299Blueair Blue Pure 211+ Auto$339Coway Airmega 250$399Coway Airmega 400$549Blueair Protect 7470i$649Dyson Purifier Hot+Cool Formaldehyde HP09$799

Buying for

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

Straight answer

Overall: 3 to 2

Buy the Alen BreatheSmart 75i Large Room Air Purifier.

  • Leads 3 of 5 rankable overall specs; Levoit Core 400S takes 2.
  • CADR: 350 CFM across Smoke, Dust, Pollen vs 260 CFM / 442 m³/h
  • Coverage area: 1,400 sq ft vs 403 sq ft
  • Levoit Core 400S is $530 cheaper. Pay the difference only if cadr matters to you.

Check first: the Alen BreatheSmart 75i Large Room Air Purifier weighs over 25 lb (11 kg). Tick them under deal-breakers if that rules it out.

3 Alen BreatheSmart 75i Large Room Air Purifier5 rankable of 11 specsLevoit Core 400S 2

Deal-breakers

tick what would make you walk away

  • row

    Undersized for an open-plan living area.

    Clear:Alen BreatheSmart 75i Large Room Air Purifier · 1,400 sq ftTrips:Levoit Core 400S · 403 sq ft
  • row

    Hard to move between rooms.

    Trips:Alen BreatheSmart 75i Large Room Air Purifier · 27.0 lbClear:Levoit Core 400S · 14.1 lb

At a glance

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

2 of 2 differ

CADR

Alen

350 CFM across Smoke, Dust, Pollen

Levoit

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

Coverage area

Alen

1,400 sq ft (2 air changes/hr) / 700 sq ft (4 air changes/hr)

Levoit

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

True 3-Year Cost of Ownership (TCO)

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

Alen BreatheSmart 75i Large Room Air Purifier

Upfront list price$749
3-Yr B6-Pure heavy HEPA filter (Every 12–15 months (~$99/yr))+$297
3-Year Estimated Total$1,046

Levoit Core 400S

Upfront list price$219
3-Yr H13 True HEPA filter (Every 12 months (~$45/yr))+$135
3-Year Estimated Total$354

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.

Alen

Requires 12 in perimeter airflow space

Levoit

360° intake requires 15 in perimeter clearance from walls

Nighttime Sleep Mode Noise

Levels below 25 dB are virtually silent for light sleepers.

Alen

Standard sleep speed

Levoit

24 dB quiet sleep mode

Unit Footprint & Dimensions

Alen

Standard room purifier footprint

Levoit

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

The 90-Day Owner Regret Check

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

Post-Purchase Truths

Alen: 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: 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.

Alen BreatheSmart 75i Large Room Air Purifier$7493 wins
Levoit Core 400S$2192 wins

Performance

leads 2-0
Performance specifications. Middle column is Alen BreatheSmart 75i Large Room Air Purifier, right column is Levoit Core 400S.
CADR350 CFM across Smoke, Dust, Pollen (wins this row: higher)260 CFM / 442 m³/h (Smoke), 260 CFM (Dust), 260 CFM (Pollen)
Room sizeLarge master suites, open living rooms, officesBedrooms, apartments, mid-size living spaces
Coverage area1,400 sq ft (2 air changes/hr) / 700 sq ft (4 air changes/hr) (wins this row: higher)403 sq ft (5 air changes/hr) / 990 sq ft (2 air changes/hr)

Filters

leads 1-0
Filters specifications. Middle column is Alen BreatheSmart 75i Large Room Air Purifier, right column is Levoit Core 400S.
Filter typesMedical-grade H13 True HEPA + Antimicrobial layer + Heavy Odor Carbon3-Stage: Nylon Pre-filter + H13 True HEPA + High-Efficiency Activated Carbon
Filter life12–15 months extra long filter life (wins this row: higher)6–12 months

Usability & Smart

leads 1-0
Usability & Smart specifications. Middle column is Alen BreatheSmart 75i Large Room Air Purifier, right column is Levoit Core 400S.
Noise levels25 dB (WhisperMax) – 49 dB (Turbo speed)24 dB (Sleep mode) – 52 dB (High mode) (wins this row: lower)
Energy consumption45 W (Energy Star certified)38 W max power consumption
Smart featuresAlen Air App (Wi-Fi), auto modes, color ring statusVeSync Wi-Fi App, Amazon Alexa, Google Assistant voice control
Air quality sensorsLaser air quality sensor detecting fine particle levels with 5 color ringsAirSight Plus Laser Dust Sensor with PM2.5 numerical display and 4-color ring

Design & Ownership

leads 1-0
Design & Ownership specifications. Middle column is Alen BreatheSmart 75i Large Room Air Purifier, right column is Levoit Core 400S.
Weight27.0 lb (12.2 kg)14.1 lb (6.4 kg) (wins this row: lower)
WarrantyLifetime warranty (with active filter subscription)2 years limited warranty
Most rows are from the official spec sheet. Marked rows are other published figures or our summary, not lab tests we ran.
Alen BreatheSmart 75i Large Room Air Purifier source (opens in a new tab)Levoit Core 400S source (opens in a new tab)

Which one should you buy

Pick this one if

Alen BreatheSmart 75i Large Room Air Purifier

Commercial-grade quiet purifier cleaning up to 1,400 sq ft every 30 minutes with a lifetime warranty.

  • Industry-exclusive transferable Lifetime Warranty
  • Tuned pink noise frequencies promote deeper sleep on WhisperMax mode
  • Medical-grade H13 True HEPA filter lasts up to 15 months

What you give up

  • High initial investment
  • Tall tower profile
Full Alen BreatheSmart 75i Large Room Air Purifier specs →

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 →

Best for each use

Bedrooms

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

For bedrooms, buy the Levoit Core 400S.

  • Leads 2 of 2 rankable bedrooms specs.
  • Noise levels: 24 dB vs 25 dB
  • Weight: 14.1 lb vs 27.0 lb
  • It is also $530 cheaper.

Big rooms & allergies

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

For big rooms & allergies, buy the Alen BreatheSmart 75i Large Room Air Purifier.

  • Leads 3 of 3 rankable big rooms & allergies specs.
  • CADR: 350 CFM across Smoke, Dust, Pollen vs 260 CFM / 442 m³/h
  • Coverage area: 1,400 sq ft vs 403 sq ft
  • Levoit Core 400S is $530 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.

  • Energy consumption: 45 W vs 38 W max power consumption
  • Warranty: Lifetime warranty vs 2 years limited warranty

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.

Alen BreatheSmart 75i Large Room Air Purifier spec sheetLevoit Core 400S spec sheet

Manufacturer pages: Alen BreatheSmart 75i Large Room Air Purifier ↗ · Levoit Core 400S ↗

Common questions

Which is cheaper, the Alen BreatheSmart 75i Large Room Air Purifier or the Levoit Core 400S?

Levoit Core 400S costs $530 less at list price.

What is the biggest catch with the Alen BreatheSmart 75i Large Room Air Purifier or Levoit Core 400S?

Levoit Core 400S has this deal-breaker: under 1,000 sq ft coverage. Undersized for an open-plan living area.

Which is better for bedrooms, the Alen BreatheSmart 75i Large Room Air Purifier or the Levoit Core 400S?

For bedrooms, buy the Levoit Core 400S. Leads 2 of 2 rankable bedrooms specs. Noise levels: 24 dB vs 25 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.

Other matchups

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