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Appliances head-to-head

Coway Airmega 400vsWinix 5500-2

Coway Airmega 400 vs Winix 5500-2, scored side by side on all 5 Appliances axes. Overall 8.0 to 8.1.

Coway Airmega 400

Coway

8.0

The heaviest-duty unit here, sized for rooms most purifiers quietly cannot handle.

Price and availability change constantly, so we don't quote them here — the link opens the current Amazon listing.

Winix 5500-2

Winix

8.1

The recommendation-thread default: true HEPA plus carbon, and filters you can actually find.

Price and availability change constantly, so we don't quote them here — the link opens the current Amazon listing.

Where they diverge

Two products can average the same and still feel different, because the shape of the scores differs. Left of center is Coway Airmega 400, right is Winix 5500-2.

Coway Airmega 400

Axis

Winix 5500-2

  • 9.0
    Performance
    8.2
  • 7.0
    Value
    9.0
  • 8.4
    Durability
    7.6
  • 8.2
    Ease of use
    7.8
  • 7.6
    Quietness
    7.8

Which one to pick

Take the Coway Airmega 400

Leads on Performance, Durability and Ease of use.

  • A room large enough that smaller units cycle constantly
  • You want a particulate number rather than a coloured light
  • Dual-sided intake suits where the unit has to sit

Take the Winix 5500-2

Leads on Value and Quietness.

  • Cooking smells and smoke, where the carbon stage earns its place
  • You want replacement filters from more than one supplier
  • Auto mode that responds to actual air quality

What each one gets wrong

Coway Airmega 400

  • Proprietary filters that cost real money every six months
  • Floor space is tight — the footprint is substantial

Winix 5500-2

  • You want the ionizer permanently gone rather than switched off each time
  • A visible control panel light in a dark bedroom bothers you

Specs, side by side

SpecCoway Airmega 400Winix 5500-2
CoverageVery large rooms—
FilterDual intake, HEPA plus carbonTrue HEPA plus washable carbon
SensorReal-time particulate readoutAuto mode with air quality light
Extra—PlasmaWave, switchable

Rankings they both appear in

Questions

Coway Airmega 400 or Winix 5500-2 — which should I buy?
Coway Airmega 400 leads on Performance, Durability and Ease of use. If Value and Quietness matter more to you, take the Winix 5500-2 instead.
How far apart are they overall?
Coway Airmega 400 scores 8.0 and Winix 5500-2 scores 8.1, a gap of 0.1. The total is the plain average of the 5 axes used in Appliances.