Air purifier · large-room
Levoit Core 400S
A higher-output smart HEPA purifier for large living rooms with an air-quality sensor and auto mode.
Flags
- · Claimed room size exceeds what the unit's AHAM CADR can deliver.
Flags indicate missing certifications or data gaps under our rubric, not a confirmed finding that a product fails to perform.
Total cost of ownership
- Annual filters
- $75/yr
- Device
- $190
- 5-year total
- $565
Certifications
- ANSI/AHAM AC-1smoke, dust, pollen
- Energy Star Room Air Cleanersefficiency
Overview
The Levoit Core 400S is a large-room air purifier built around a H13 filter. Its Clean Air Delivery Rate is AHAM-verified at 259 cfm, and it uses no ionizer and no ozone-generating stage. Filters run about $75 per year, a typical running cost.
By the numbers
- Clean Air Delivery Rate
- 259 cfm (AHAM-verified)
- Real coverage at 4.8 ACH
- ~401 sq ft
- Manufacturer room claim
- 403 sq ft (a ~2 ACH figure; larger than its CADR supports)
- Filter
- H13
- Ozone / ionizer
- no ionizer and no ozone-generating stage
- Noise (low)
- 24 dBA, 24 dBA sleep
- Power draw
- 38 W
- Annual filter cost
- $75/yr
- 5-year cost of ownership
- $565 (device + filters)
- Certifications
- ANSI/AHAM AC-1, Energy Star Room Air Cleaners
Strengths
- + Safety: 8.0/10
- + Practical Fit: 10.0/10
Watch-outs
- - Claimed room size exceeds what the unit's AHAM CADR can deliver.
Who it is for
- · Large living rooms and open-plan spaces
- · Anyone sensitive to ozone, or with asthma or allergies
- · Light sleepers - it is near-silent on its lowest setting
Who should skip it
- · Large rooms - its real coverage is smaller than the box claims
What to know before buying
- · The replacement is the Core 400S-RF (also listed as LRF-C401S-WUS), a 3-in-1 pre-filter, HEPA, and carbon unit Levoit recommends replacing about every six to eight months.
- · Current AHAM-verified CADR is about 231 smoke / 240 dust / 259 pollen, rated for roughly 358 sq ft at 4.8 air changes per hour.
- · Measured noise runs from about 24 dB in sleep mode to roughly 52 dB at top speed.
How it scored
Verified Performance
5.0/10 · 30%AHAM CADR, true sealed HEPA, air changes per hour, honest room-size match.
- +3AHAM Verifide CADR published A259 cfm (AHAM Verifide) - CADR is third-party verified by AHAM, not a manufacturer claim.
- +2Hits ~5 air changes/hour at rated room B4.8 ACH at 403 sq ft - Delivers at least 4.8 air changes per hour at its rated room size.
Total Cost of Ownership
6.0/10 · 25%Computed annual filter cost vs the room-size class median. The number nobody surfaces.
- +5Annual filter cost vs class median A$74.99/yr (below class median) - Computed annual filter cost scored against the room-size class median.
- +1No proprietary filter lock-in Bcross-compatible filters - Filters are sold separately with cross-compatible equivalents.
Certification
5.0/10 · 15%AHAM Verifide, Energy Star, CARB, published lab efficiency.
- +2Energy Star certified AEnergy Star - Energy Star certified for energy efficiency.
- +3Published lab-tested efficiency AAHAM-listed CADR - Filtration performance is independently lab-tested and published.
Safety
8.0/10 · 15%Ozone and ionizer behavior. Ozone generators hard-fail.
- +8No ozone-generating technology Ano ionizer / no ozone - No ionizer, plasma, or ozone-emitting stage.
Practical Fit
10.0/10 · 15%Noise, filter-change indicator, energy draw. Smart features are neutral.
- +4Quiet at low speed B24 dBA low - Runs at 50 dBA or quieter on its lowest useful speed.
- +2Near-silent sleep mode B24 dBA sleep - Sleep/night setting is 30 dBA or quieter.
- +2Filter-change indicator Bindicator present - Tells you when the filter actually needs replacing.
- +2Energy draw disclosed B38 W - Discloses power draw at a standard speed.
- ·Smart features (neutral) Capp / auto mode - App control and auto mode are neither rewarded nor penalized.
FAQ
- Will Core 300 filters fit this unit?
- No. The Core 400S uses its own Core 400S-RF filter and is not cross-compatible with Core 300 or Core 200 filters, which are different sizes.
- Does it have a true air quality sensor?
- Yes. The Core 400S has a PM2.5 laser sensor that drives auto mode and shows a real-time air quality reading and color ring.
Related guides
This score is our opinion under our published rubric, not a statement of objective fact or a lab test of this product. We score what third-party certifications prove; absence of a certification means we found no verification, not that a product fails to perform. Last reviewed 2026-06-01. Scored under air-v1.0. Prices and certifications are re-verified on a cadence; see the methodology for how each rule fires.