Coway Airmega 400S vs Winix A231
Side-by-side comparison based on published product information. Check Amazon for current price and availability.
How we evaluate products
We compare published manufacturer specifications, manuals, support policies, and relevant public guidance. We do not present unpublished laboratory or in-home measurements as our own testing.
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Use the feature table below to match published specifications to your room, filtration, and noise requirements. We do not assign an overall score without retained independent test evidence.
Feature comparison
| Feature | Coway Airmega 400S | Winix A231 |
|---|---|---|
| CADR | 328 / 328 / 400 CFM (Smoke / Dust / Pollen) | 147 / 149 / 154 CFM (Smoke / Dust / Pollen) |
| Coverage | 1,560 sq ft (2 ACH); 3,120 sq ft (1 ACH) | 230 sq ft (AHAM Verifide); up to 1,104 sq ft in 1 hour |
| Noise level | 22-52 dB(A) | 25 dB minimum |
| Power | 66 W | 55 W |
| Filter type | 2 washable pre-filters + Max2 filter set (activated carbon + HEPA) | 4-stage 360-degree: fine mesh pre-filter + True HEPA + activated carbon + PlasmaWave |
| Filter life | Max2 filter set 1 year; pre-filters washable | True HEPA 12 months; activated carbon 12 months |
| Warranty | 1 year (parts); 5 years (motor and electronic parts) | 2 years |
| Dimensions | 14.8 x 22.8 x 14.8 in (W x H x D) | 9.5 x 9.5 x 14.6 in (W x D x H) |
| Weight | 24.7 lbs | 6.75 lbs |
| Origin | — | Thailand |