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Coway Airmega 400S
#9 of 18 in large · #17 of 49 overall · all Coway models
3.3
Airmega 400 with Wi-Fi app control.
350 cfmsmoke CADR
542 sq ftAHAM room size
52 dBat full speed
66 Wmax power
$449street price, being verified
One air change of a 300 sq ft room in about 7 min$130 a year in filters$1,099 to own for 5 yearsAHAM Verifide CADR1.3 lb activated carbon
Ratings
Spec-based rating. No independent measurement has been logged for this air purifier yet, so the score uses manufacturer specifications and price. How that works.
Each rating places this unit among the others on a 0.5–5 scale, within its room-size class for the measures that scale with size and across the whole catalog for the rest. Weighted together they give the overall 3.3. Formula and weights.
Specifications
- Smoke CADR
- 350 cfm
- Dust CADR
- 350 cfm
- Pollen CADR
- 350 cfm
- AHAM room size
- 542 sq ft
- Maker's room size
- 1,560 sq ft
- Max power
- 66 W
- Noise (low / high)
- 22 / 52 dB
- Filter cost
- $130
- Filter life
- 12 months
- Filters per year
- $130
- 5-year cost of ownership
- $1,099
- True HEPA
- Yes
- Activated carbon
- 1.3 lb
- Auto mode (PM2.5 sensor)
- Yes
- App
- Yes
- Washable prefilter
- Yes
- AHAM Verifide
- Yes
- Energy Star
- Yes
- Weight
- 24.7 lb
- Released
- 2017
Independent measurements
None logged yet. We only record numbers from published tests, each with a link to its source. The reviewers and labs we track. Know of a test we've missed? Tell us.
How it compares with its neighbors
| # | Model | Smoke CADR | Dust | Pollen | W | dB max | Filters/yr | $/CADR | Score |
|---|---|---|---|---|---|---|---|---|---|
| 6 | Coway Airmega 300 | 300 | 300 | 300 | 57 | 52 | $110 | 0.9 | 3.5 |
| 7 | Coway Airmega 400 | 350 | 350 | 350 | 66 | 52 | $130 | 1.1 | 3.4 |
| 8 | Alen BreatheSmart 75i | 347 | 350 | 350 | 60 | 49 | $99 | 1.7 | 3.3 |
| 9 | Coway Airmega 400S | 350 | 350 | 350 | 66 | 52 | $130 | 1.3 | 3.3 |
| 10 | Blueair Blue Pure 211+ Auto | 350 | 350 | 350 | 61 | 56 | $140 | 0.8 | 3.3 |
| 11 | Blueair Blue Pure 211+ | 350 | 350 | 350 | 61 | 56 | $140 | 0.7 | 3.3 |
| 12 | Honeywell HPA5300 | 300 | 320 | 300 | 120 | 58 | $60 | 0.8 | 3.2 |