Levoit Core 400S: Specs, Price, Pros & Cons
This review measures the Levoit Core 400S against the full 22-spec sheet we track for Air Purifiers, comparing it like for like with the 31 other models in our database. It earns a VS Score of 46 out of 100 — the weighted result of every verified specification measured against the class average.
On the spec sheet it is strongest in smart features and weakest in filtration. Its clearest single advantage over the class average: a slightly higher CADR (smoke) — 231 CFM vs 212.72 CFM (avg). Street prices currently start at $ 239.99 for the Levoit Core 400S.
Category strengths
Where the Levoit Core 400S beats the average
- A slightly higher CADR (smoke) ?231 CFM vs 212.72 CFM (avg)
- Has app control ?
- A slightly higher coverage area ?358 sq ft vs 333.52 sq ft (avg)
- Has air quality sensor ?
- Has voice assistant ?
- A lower power consumption ?38 W vs 50.21 W (avg)
- Has auto mode ?
- Has activated carbon filter ?
- Has timer ?
- Has sleep mode ?
Where the Levoit Core 400S trails the average
- No true HEPA filter ?
- A much lower filter life ?7 months vs 16.24 months (avg)
- No washable pre-filter ?
- A slightly higher min noise level ?24 dB vs 22.26 dB (avg)
- Fewer filtration stages ?3 vs 3.56 (avg)
- A heavier build ?6.5 kg vs 5.29 kg (avg)
- A slightly higher max noise level ?52 dB vs 51.74 dB (avg)
Editor’s note
The Core 400S fills the gap in Levoit's range exactly where most family living rooms actually sit: bigger than the bedroom-sized 300S, smaller and cheaper than the open-plan 600S we also cover. The current production version – Levoit quietly ships an updated '-P' revision – carries AHAM-verified figures of 231 CFM smoke CADR and 358 square feet at nearly five air changes an hour, and those are the numbers we record rather than the older 403-square-foot figures still floating around reviews.
The formula is the one that made this line the category default. A cylindrical three-stage filter (pre-filter, HEPA-grade media, activated carbon) rated around seven months; a PM2.5 sensor with a colour-coded ring driving a genuinely responsive auto mode; the VeSync app with scheduling and air-quality history; Alexa and Google voice control; and a 24-decibel sleep floor that makes overnight running unnoticeable. At 38 watts it is efficient for the airflow – notably better per CFM than the smaller, older Core 300.
The honest notes: like the rest of Levoit's current '-P' generation, the True HEPA wording has quietly left the spec sheet – the filtration class is unchanged in practice, but certificate shoppers should know. Maximum speed reaches 52 dB, which is present in a quiet room. And the machine is a substantial 20-inch, six-and-a-half-kilo cylinder that wants floor space, not a shelf.
Against its own family: the 600S moves considerably more air for the next price step and remains the open-plan pick; the 300S handles bedrooms for less. This 400S is the correct middle for a normal living room – and street prices in the $170-180 range have made that middle unusually easy to justify.
It is the sensible default for the most common room in the house.
Specifications
Quality bars are generated automatically against 31 other air purifiers.
Performance
Clean Air Delivery Rate — how quickly smoke particles are scrubbed from the air.
The room size the purifier is rated to clean effectively.
How many times the air in the rated room is cycled each hour.
The number of filtration layers air passes through.
Filtration
A certified HEPA filter captures 99.97% of 0.3-micron particles.
The HEPA grade of the main filter (e.g. H13).
A carbon layer absorbs odours, smoke and VOCs.
Pellet-based carbon beds absorb more odour than thin coated sheets.
A rinseable pre-filter catches hair and large dust to extend filter life.
How long the main filter lasts before replacement.
Noise & power
The lowest-speed noise output; quieter suits bedrooms.
Noise at full speed; lower is better.
Maximum power draw; lower costs less to run continuously.
A dimmed, near-silent mode for overnight use.
Design
A lighter unit is easier to move between rooms.
The height of the unit.
Smart features
Measures particle levels to show and react to air quality.
Adjusts fan speed automatically based on measured air quality.
Control and monitor it from a phone app.
Works with Alexa and Google Assistant.
Tells you when the filter needs replacing.
Schedule the purifier to switch off automatically.
How the VS Score works — and what it can’t tell you
Every measurable spec is scored against the average of all the Air Purifiers we track: matching the class average scores 50, clearly beating it climbs towards 100, and each spec counts according to an editorial weight that reflects real-world impact — a battery-capacity gap moves the score far more than a colour-options list. The quality bars on the spec cards above show where this model sits inside the full range for its class, and the overall VS Score rolls every weighted result into one number.
Unknown values are never estimated. A spec this product doesn’t report simply drops out of its scoring — it isn’t penalised with a guess — but a thinner spec sheet does mean a score built on fewer data points, which is why completeness is disclosed under About this data.
Most importantly: a spec-sheet lead is not the same as a better product. Megapixels, gigahertz and benchmark points describe capacity, not experience — image processing, software optimisation, thermals, haptics and ergonomics decide how a device actually feels, and no table captures reliability or long-term support quality. Treat the VS Score as a structured summary of what can be measured, not a substitute for your own priorities.
About this data
- Specifications are compiled from each manufacturer’s official spec sheet, cross-checked against trusted specification databases, and normalised into one schema so identical things are compared identically.
- Specifications last verified August 19, 2026.
- Data completeness: 21 of the 22 specs in this category are verified (95%). Anything we could not verify is shown as Unknown — never estimated — and is excluded from the score.
- Prices and availability come from live retailer feeds via our shopping partners and refresh throughout the day; a missing price means no partner currently lists the product, not that it is discontinued.
- Want the full picture? Our editorial guidelines explain how we research products, weight the scores and stay independent.
- Spotted an error in a spec? Tell us and we will correct the sheet.
Where to buy
Prices and availability may change. Check the retailer before buying. We may earn a commission on purchases.
Price history
Air Purifiers with similar specs to the Levoit Core 400S
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The bottom line
The Levoit Core 400S earns a VS Score of 46, a solid mid-pack result among the 32 air purifiers we compare here.
- Who it’s for
- Normal living rooms: AHAM-verified 358 sq ft with sensor-driven auto, app scheduling and a 24 dB sleep floor – the correct middle of Levoit's range.
- Who should look elsewhere
- Open-plan spaces, where the Core 600S moves far more air for the next step up, and certificate shoppers – the '-P' revision no longer claims True HEPA.
- The trade-off that matters
- You accept the current revision's quietly reduced paper ratings (231 CFM, 358 sq ft) in exchange for the same platform at friendlier street prices.
- The main alternative
- Levoit Core 600S remains the open-plan pick we cover; the Core 300S-P handles bedrooms for meaningfully less.
The VS Score is generated automatically from the weighted specifications above, measured against all other air purifiers in our database. Treat it as a shortlisting guide — not a substitute for your own priorities.
