Home › Air Purifiers › Blueair Blue Pure 311i Max vs Coway Airmega 400S
Blueair Blue Pure 311i Max vs Coway Airmega 400S
Blueair's $250 model meets Coway's $450 model. We tally wins category by category, then call a verdict.
Our recommendation
Specs are roughly tied (3–3). At $250, the Blueair Blue Pure 311i Max is the value pick.
Blueair Blue Pure 311i Max: 3 category wins Coway Airmega 400S: 3 category wins
Side by side
Blueair Blue Pure 311i Max
$250
Coway Airmega 400S
$450
CADR
250 CFM
350 CFMWin
Coverage
35 m²
115 m²Win
Noise (low)
23 dB
22 dBWin
Noise (high)
51 dBWin
52 dB
True HEPA
Yes
Yes
Activated carbon
Yes
Yes
Smart app
Yes
Yes
Voice control
Yes
Yes
Filter cost / yr
60 USDWin
110 USD
Dimensions
25 × 25 × 42 cm
35 × 35 × 57 cm
Weight
3.5 kgWin
11.4 kg
Blueair Blue Pure 311i Max
A compact, quiet Swedish purifier with HEPASilent tech and smart auto for medium rooms.
Coway Airmega 400S
A dual-intake powerhouse that covers huge rooms with deep carbon and a slick smart app.
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