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Head to head

Levoit Core 400S vs Levoit Core 300S Smart True HEPA Air Purifier

They split the 4 rankable specs evenly, so cost decides it: Levoit Core 300S Smart True HEPA Air Purifier costs $70 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); Levoit Core 300S Smart True HEPA Air Purifier lists 141 CFM / 240 m³/h (Smoke), 140 CFM (Dust), 145 CFM (Pollen) (Levoit 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); Levoit Core 300S Smart True HEPA Air Purifier lists 219 sq ft (5 air changes/hr) / 1,095 sq ft (1 air change/hr) (Levoit sheet, 2026-09-02).
  • Room size: Levoit Core 400S lists Bedrooms, apartments, mid-size living spaces (Levoit sheet, 2026-09-02); Levoit Core 300S Smart True HEPA Air Purifier lists Bedrooms, nurseries, home offices up to 219 sq ft (5 ACH) / up to 1,095 sq ft (1 ACH) (Levoit 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); Levoit Core 300S Smart True HEPA Air Purifier lists 3-Stage filtration: Pre-filter + H13 True HEPA + High-Efficiency Activated Carbon filter (Levoit sheet, 2026-09-02).
  • Filter life: Levoit Core 400S lists 6–12 months (Levoit sheet, 2026-09-02); Levoit Core 300S Smart True HEPA Air Purifier lists 6 to 8 months (Levoit sheet, 2026-09-02).

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

Levoit Core 400S
$2192 spec wins
Swap

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Levoit Core 300S Smart True HEPA Air Purifier
$1492 spec wins
Swap

Compare a different air purifier

Winix 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$649Alen BreatheSmart 75i Large Room Air Purifier$749Dyson Purifier Hot+Cool Formaldehyde HP09$799

Generational Upgrade Analysis

Generational Comparison

Levoit sibling models compared across generations.

Our recommendation: Compare the spec differences below to see if the price premium justifies the newer model's additions.

Buying for

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

Straight answer

Overall: 2 to 2

Tied overall. Levoit Core 300S Smart True HEPA Air Purifier is cheaper.

  • The 4 rankable overall specs split 2 to 2.
  • Saves $70 at list price.
2 Levoit Core 400S4 rankable of 11 specsLevoit Core 300S Smart True HEPA Air Purifier 2

Deal-breakers

tick what would make you walk away

  • row

    Undersized for an open-plan living area.

    Trips:Levoit Core 400S · 403 sq ftTrips:Levoit Core 300S Smart True HEPA Air Purifier · 219 sq ft

At a glance

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

2 of 2 differ

CADR

Core 400S

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

Core 300S Smart True HEPA Air Purifier

141 CFM / 240 m³/h (Smoke), 140 CFM (Dust), 145 CFM (Pollen)

Coverage area

Core 400S

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

Core 300S Smart True HEPA Air Purifier

219 sq ft (5 air changes/hr) / 1,095 sq ft (1 air change/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

Levoit Core 300S Smart True HEPA Air Purifier

Upfront list price$149
3-Yr Replacement filter (Every 6–8 months (~$26/yr))+$78
3-Year Estimated Total$227

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.

Core 400S

360° intake requires 15 in perimeter clearance from walls

Core 300S Smart True HEPA Air Purifier

360° intake requires 15 in perimeter clearance from walls

Nighttime Sleep Mode Noise

Levels below 25 dB are virtually silent for light sleepers.

Core 400S

24 dB quiet sleep mode

Core 300S Smart True HEPA Air Purifier

22 dB whisper mode (practically inaudible on nightstand)

Unit Footprint & Dimensions

Core 400S

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

Core 300S Smart True HEPA Air Purifier

Compact cylinder (8.7 × 8.7 × 14.2 in; 5.9 lb)

The 90-Day Owner Regret Check

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

Post-Purchase Truths

Core 400S: 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.

Core 300S Smart True HEPA Air Purifier: What to watch for

  • Hardware Quirk

    No true HEPA H13 rating on recent replacement filters.

    Due to US regulatory naming updates, Levoit adjusted terminology from "True HEPA" to "HEPASmart" on several retail filter packs.

  • Maintenance

    Filter check light does not measure real dirt; it operates on a fixed timer.

    The filter replacement alert triggers every 6 months regardless of whether your room was smoky or pristine, requiring manual reset.

Levoit Core 400S$2192 wins
Levoit Core 300S Smart True HEPA Air Purifier$1492 wins

Performance

leads 2-0
Performance specifications. Middle column is Levoit Core 400S, right column is Levoit Core 300S Smart True HEPA Air Purifier.
CADR260 CFM / 442 m³/h (Smoke), 260 CFM (Dust), 260 CFM (Pollen) (wins this row: higher)141 CFM / 240 m³/h (Smoke), 140 CFM (Dust), 145 CFM (Pollen)
Room sizeBedrooms, apartments, mid-size living spacesBedrooms, nurseries, home offices up to 219 sq ft (5 ACH) / up to 1,095 sq ft (1 ACH)
Coverage area403 sq ft (5 air changes/hr) / 990 sq ft (2 air changes/hr) (wins this row: higher)219 sq ft (5 air changes/hr) / 1,095 sq ft (1 air change/hr)

Filters

2 differences
Filters specifications. Middle column is Levoit Core 400S, right column is Levoit Core 300S Smart True HEPA Air Purifier.
Filter types3-Stage: Nylon Pre-filter + H13 True HEPA + High-Efficiency Activated Carbon3-Stage filtration: Pre-filter + H13 True HEPA + High-Efficiency Activated Carbon filter
Filter life6–12 months6 to 8 months

Usability & Smart

leads 1-0
Usability & Smart specifications. Middle column is Levoit Core 400S, right column is Levoit Core 300S Smart True HEPA Air Purifier.
Noise levels24 dB (Sleep mode) – 52 dB (High mode)22 dB (Sleep mode) – 48 dB (High speed) (wins this row: lower)
Energy consumption38 W max power consumption23 W max power (Energy Star Certified)
Smart featuresVeSync Wi-Fi App, Amazon Alexa, Google Assistant voice controlVeSync App (iOS/Android), voice control via Amazon Alexa and Google Assistant
Air quality sensorsAirSight Plus Laser Dust Sensor with PM2.5 numerical display and 4-color ringAirSight Plus Laser Dust Sensor (real-time PM2.5 with 4-color air quality ring)

Design & Ownership

leads 1-0
Design & Ownership specifications. Middle column is Levoit Core 400S, right column is Levoit Core 300S Smart True HEPA Air Purifier.
Weight14.1 lb (6.4 kg)5.95 lb (2.7 kg) (wins this row: lower)
Warranty2 years limited warranty2 years limited warranty (with 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 (opens in a new tab)Levoit Core 300S Smart True HEPA Air Purifier source (opens in a new tab)

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

Levoit Core 300S Smart True HEPA Air Purifier

Compact smart air purifier with 3-stage True HEPA H13 filtration, VortexAir technology, and VeSync app smart control.

  • Whisper-quiet 22dB Sleep Mode
  • Compact footprint ideal for bedrooms and home offices
  • Full smart app control and Alexa/Google voice integration

What you give up

  • Designed for smaller to medium rooms (up to 219 sq ft for 5 ACH)
  • Laser dust sensor only measures PM2.5 (no VOC / gas sensor)
Full Levoit Core 300S Smart True HEPA Air Purifier specs →

Best for each use

Bedrooms

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

For bedrooms, buy the Levoit Core 300S Smart True HEPA Air Purifier.

  • Leads 2 of 2 rankable bedrooms specs.
  • Noise levels: 22 dB vs 24 dB
  • Weight: 5.95 lb vs 14.1 lb
  • It is also $70 cheaper.

Big rooms & allergies

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

For big rooms & allergies, buy the Levoit Core 400S.

  • Leads 2 of 2 rankable big rooms & allergies specs.
  • CADR: 260 CFM / 442 m³/h vs 141 CFM / 240 m³/h
  • Coverage area: 403 sq ft vs 219 sq ft
  • Levoit Core 300S Smart True HEPA Air Purifier is $70 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.

  • Filter life: 6–12 months vs 6 to 8 months
  • Energy consumption: 38 W max power consumption vs 23 W max power

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 sheetLevoit Core 300S Smart True HEPA Air Purifier spec sheet

Manufacturer pages: Levoit Core 400S ↗ · Levoit Core 300S Smart True HEPA Air Purifier ↗

Common questions

Which is cheaper, the Levoit Core 400S or the Levoit Core 300S Smart True HEPA Air Purifier?

Levoit Core 300S Smart True HEPA Air Purifier costs $70 less at list price.

What is the biggest catch with the Levoit Core 400S or Levoit Core 300S Smart True HEPA Air Purifier?

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

Which is better for bedrooms, the Levoit Core 400S or the Levoit Core 300S Smart True HEPA Air Purifier?

For bedrooms, buy the Levoit Core 300S Smart True HEPA Air Purifier. Leads 2 of 2 rankable bedrooms specs. Noise levels: 22 dB vs 24 dB

What cannot be compared from spec sheets?

Of the 11 specs tracked here, 7 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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