Coway Airmega 150
#4 in Medium roomsFull review
A quiet, good-looking purifier for a small bedroom or nursery. Bigger rooms need more airflow for the money.
Amazon $186.29$186.29
3.2/5
A medium-room HEPA and carbon purifier with long-life filters, for buyers who prefer simple manual controls.
- 167 cfmSmoke CADR
- 259 sq ftRoom size
- $34.99/yearFilters
- 23 dBNoise
- 1 yearsWarranty
Check price at Amazon$179.99
Price checked October 22, 2026. As an Amazon Associate we earn from qualifying purchases.
Pros
- HEPA filter can last up to two years, so filter costs are low
- Includes a carbon filter for odors
- Quiet 23 dB sleep setting
Cons
- No air-quality sensor or auto mode
- Plasmacluster ionizer can’t be confirmed as switchable
- One-year warranty
- Pricey for its 167 CFM
How it scores
The rating comes from 6 measured or published factors, each scored 0-100 against fixed reference points for its room size. How we rank explains each one.
Specifications
| Model number | FP-K50UW |
|---|---|
| Performance | |
| Smoke CADR | 167 cfm |
| Dust CADR | 171 cfm |
| Pollen CADR | 188 cfm |
| CADR certified by | AHAM Verifide |
| Room size (AHAM) | 259 sq ft |
| Coverage (maker) | 1,253 sq ft |
| Noise | 23 dB |
| Efficiency | |
| ENERGY STAR | No |
| Filters | |
| Filter | True HEPA with separate activated carbon filter and washable pre-filter |
| Activated carbon | Yes |
| Replacement | FZ-K50HFU (HEPA) |
| Replacement cost | $69.99 every 24 months |
| Yearly filter cost | $34.99/year |
| Ionizer | Yes |
| CARB certified (ozone) | Yes |
| Controls and build | |
| Air-quality sensor | None |
| Auto mode | No |
| Wi-Fi app | No |
| Fan speeds | 3 |
| Dimensions | 21.3 x 15.1 x 8.2 in |
| Weight | 11 lb |
| Warranty | 1 years |
Alternatives in this room size
KNKA APH4000
#5 in Medium roomsFull review
A low-priced purifier for medium rooms up to about 350 sq ft. It has a sensor-driven auto mode, but filter costs add up if you follow KNKA’s replacement schedule.
Amazon $99.99$99.99
Medify MA-40
#7 in Medium roomsFull review
A mid-to-large-room HEPA purifier with cheap filters, for living rooms where noise isn’t a concern.
Amazon $249.99$249.99
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