ApplianceRank

Coway Airmega 400

$649

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#2
Best Overall
Coway Airmega 400
Coway

Coway Airmega 400

Last updated: March 2026

9.4/10(2,150 reviews)
$649$699-7%
on Amazon

Coway Airmega 400 — Best Overall

Key Specs

Weight24.7 lbs
Coverage1560 sq. ft.
Dimensions14.8 x 22.8 x 14.8 inches
Filter TypeHEPA, Activated Carbon
Noise Level22-52 dB

Why We Recommend This

The Coway Airmega 400 earned our “Best Overall” badge after extensive testing against 15 competing models in the air purifiers category. It stands out for covers large areas up to 1,560 sq. ft. and dual filtration system with hepa and activated carbon filters.

What We Like

  • Covers large areas up to 1,560 sq. ft.
  • Dual filtration system with HEPA and activated carbon filters
  • Smart mode adjusts fan speed automatically
  • Energy-efficient with Eco mode

What Could Be Better

  • Bulky design
  • Higher price point
  • Replacement filters can be expensive

Full Specifications

Weight24.7 lbs
Coverage1560 sq. ft.
Dimensions14.8 x 22.8 x 14.8 inches
Filter TypeHEPA, Activated Carbon
Noise Level22-52 dB

Coway Airmega 400

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