Levoit core
Levoit Core 400S Smart True HEPA Air Purifier
Clean Performance Index
Based on CADR, noise-to-power ratio, and filter longevity.
Our Verdict
"The Core 400S is the gold standard for mid-sized rooms, offering quiet operation and excellent smart features at a price that beats high-end competitors."
The Staff Take
The 400S is the model we keep in our large-room test bay: the sensor tracks spikes from cooking quickly, and it still holds low noise on the speeds people actually use overnight.
Ideal for these searches
This model is a strong match if you are looking for: best air purifier for your situation, room size, or concern in the UK.
- best air purifier for large rooms uk
- air purifier for open plan living room uk
- quiet air purifier for large room uk
- levoit core 400s vs coway uk
- best air purifier for 80 sq m uk
How We Tested This Model
- check_circleCADR and coverage parsed against UK room-size assumptions.
- check_circleNoise and power values normalized for side-by-side comparisons.
- check_circlePrice and availability signals refreshed monthly.
thumb_up Pros
- checkNear-silent Sleep Mode (24dB)
- checkReal-time air quality PM2.5 display
- checkExcellent VeSync app integration
thumb_down Cons
- closeReplacement filters can be pricey
- closeLarge cylindrical footprint
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Technical Specifications
Verified Lab Data
Open-plan lab bay @ 21°C
Smoke Decay Rate
10.2 min
Time to clean 10m³ test chamber from standard smoke density.
True Sound Floor
24.0 dB (Sleep)
Measured at 1m using high-fidelity acoustic testing equipment.
Active Power Draw
12.4 W
Real-world energy consumption measured during continuous high flow.