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Head-to-head · Best Air Purifiers

Coway Airmega 400S vs Levoit Core 400S

Which is the better buy? Side-by-side on rating, price, strengths, and watch-outs — with the published ratings we averaged to get there.

The short answer

Coway Airmega 400S comes out ahead by a narrow margin (4.5 vs 4.2). The gap is mostly about Owners of large open-concept living areas — read the strengths below before deciding.

Coway Airmega 400S
Higher ratedRanked #1 in Best Air Purifiers
Coway Airmega 400S
$749as of Apr 22

The Coway Airmega 400S is a powerful air purifier designed for large spaces, capable of cleaning up to 3,120 sq. ft. with exceptional speed and low noise in sleep mode. While it excels in air cleaning performance and offers convenient smart controls, its high operating costs and large physical footprint are notable drawbacks for potential buyers.

Strengths
  • — Covers spaces up to 3,120 sq. ft. with high efficiency
  • — Removes 100% of particulates in 45 minutes during testing
  • — Operates at whisper-quiet 22 dB in sleep mode
Watch-outs
  • — High operating cost due to expensive replacement filters
  • — Bulky dimensions (14.8" x 22.8" x 14.8") occupy significant floor space
  • — Requires a mobile app to access certain smart features
$749 · Check Price on AmazonFull review →
Levoit Core 400S
Ranked #3 in Best Air Purifiers
Levoit Core 400S
$182as of Apr 22

The Levoit Core 400S offers significant improvements over previous models with effective particle removal, smart app integration, and a quiet, space-saving cylindrical design. While it lacks official HEPA certification and has minor discrepancies between claimed and tested noise or power usage, it delivers strong performance for mid-range users in rooms up to 450 sq ft.

Strengths
  • — Auto mode detected incense smoke and reacted in under 8 minutes
  • — VeSync app allows remote control and adjustment during pollen spikes
  • — Cylindrical 360-degree intake design pulls air from all sides effectively
Watch-outs
  • — Lacks official HEPA certification despite matching medical-grade performance in tests
  • — Actual noise level on low speed measured at 26 dB rather than the claimed 24 dB
  • — Energy consumption tested at 48W, slightly higher than the 45W specification
$182 · Check Price on AmazonFull review →

How they stack up

Coway Airmega 400S

The Coway Airmega 400S dominates in raw coverage power, cleaning spaces up to 3,120 sq. ft., which far exceeds the 540 sq. ft. limit of the Blueair Blue Pure 211+ and the 99 sq. ft. limit of the Dyson TP07. While it shares smart features with the Levoit Core 400S, the Coway is physically much bulkier and incurs higher long-term filter costs than the Levoit.

Levoit Core 400S

The Levoit Core 400S offers a compact, 360-degree intake design that is more space-efficient than the bulky Coway Airmega 400S or Blueair Blue Pure 211+. While it matches the Coway in smart app integration, it lacks the official HEPA certification that the Dyson TP07 and Coway possess, and it does not offer the cooling function unique to the Dyson.

Specs side-by-side

SpecCoway Airmega 400SLevoit Core 400S
CADR328 cfm244 CFM
Room Coverage3,120 sq. ft.400 sq ft (tested up to 450 sq ft)
Noise Level22 dB24–26 dB
Filtration SystemHyperCaptive (Pre-filter, Carbon, HEPA)Pre-filter, Main Filter, Activated Carbon
Dimensions14.8 x 22.8 x 14.8 inches20.5 x 11 inches
Weight—10.5 lbs
Power Consumption—45–48 W
Filter Lifespan—6–8 months
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