Home › Air Purifiers › Alen BreatheSmart 75i vs Coway Airmega 400S
Alen BreatheSmart 75i vs Coway Airmega 400S
Alen's $750 model meets Coway's $450 model. We tally wins category by category, then call a verdict.
Our recommendation
The Coway Airmega 400S wins outright, better on more specs and cheaper by $300.
Alen BreatheSmart 75i: 0 category wins Coway Airmega 400S: 7 category wins
Side by side
Alen BreatheSmart 75i
$750
Coway Airmega 400S
$450
CADR
347 CFM
350 CFMWin
Coverage
84 m²
115 m²Win
Noise (low)
25 dB
22 dBWin
Noise (high)
55 dB
52 dBWin
True HEPA
Yes
Yes
Activated carbon
Yes
Yes
Smart app
Yes
Yes
Voice control
No
YesWin
Filter cost / yr
130 USD
110 USDWin
Dimensions
47 × 22 × 67 cm
35 × 35 × 57 cm
Weight
12.7 kg
11.4 kgWin
Alen BreatheSmart 75i
A large-room smart purifier with swappable HEPA filters and laser-driven auto air-quality control.
Coway Airmega 400S
A dual-intake powerhouse that covers huge rooms with deep carbon and a slick smart app.
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