Coway Airmega 400S
$649
#1
Large homes with pets
Coway
Coway Airmega 400S
Last updated: March 2026
9.4/10(3,200 reviews)
$649$749-13%
on AmazonCoway Airmega 400S — Large homes with pets
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Key Specs
Weight24.7 lbs
Dimensions14.8 x 22.8 x 14.8 inches
Filter TypeTrue HEPA and activated carbon
Noise Level22 - 52 dB
Coverage Area1560 sq. ft.
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Why We Recommend This
The Coway Airmega 400S earned our “Large homes with pets” badge after research against 2 competing models in the hepa purifiers category. It stands out for covers large areas up to 1560 sq. ft. and smart mode adjusts fan speed automatically.
What We Like
- Covers large areas up to 1560 sq. ft.
- Smart mode adjusts fan speed automatically
- Real-time air quality monitoring
- Compatible with Alexa
What Could Be Better
- High initial cost
- Large footprint
- Filters are expensive to replace
Full Specifications
Weight24.7 lbs
Dimensions14.8 x 22.8 x 14.8 inches
Filter TypeTrue HEPA and activated carbon
Noise Level22 - 52 dB
Coverage Area1560 sq. ft.
Coway Airmega 400S
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Frequently Asked Questions
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