Coway Airmega 400S vs Honeywell HPA300
Side-by-side comparison based on published product information. Check Amazon for current price and availability.
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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 We do not present unpublished laboratory or in-home measurements as our own testing.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.
Honeywell HPA300
Honeywell
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Feature comparison
| Feature | Coway Airmega 400S | Honeywell HPA300 |
|---|---|---|
| CADR | 328 / 328 / 400 CFM (Smoke / Dust / Pollen) | High airflow rated for extra-large rooms (smoke, dust and pollen) |
| Coverage | 1,560 sq ft (2 ACH); 3,120 sq ft (1 ACH) | 465 sq ft (4.8 ACH); filters up to 2,250 sq ft per hour |
| Noise level | 22-52 dB(A) | — |
| Power | 66 W | — |
| Filter type | 2 washable pre-filters + Max2 filter set (activated carbon + HEPA) | Certified Honeywell HEPA filter + washable activated-carbon pre-filter |
| Filter life | Max2 filter set 1 year; pre-filters washable | — |
| Warranty | 1 year (parts); 5 years (motor and electronic parts) | 5-year limited |
| Dimensions | 14.8 x 22.8 x 14.8 in (W x H x D) | 21.0 x 16.6 x 11.4 in |
| Weight | 24.7 lbs | 15.4 lbs |
| Fan speeds | — | 3 speeds |