Coway · Small & quiet
Coway Airmega 150
A small, quiet Coway for bedrooms and nurseries, with an air-quality sensor and auto mode, in green, white or pink.
- All-in-one HEPA + carbon cartridge
- Sensor, auto mode, 20 dB on low
$189.99at cowaymega.com · Nov 2026
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- smoke CADR: clean air it moves each minute
- 153 cfm
- room size it suits, every day
- 22 m²
- 237 ft²
- room size on smoggy days
- 14 m²
- 153 ft²
Coway Airmega 150 at a glance
- Smoke CADR
- 153 cfm (Energy Star listing)
- Filter
- Washable pre-filter, activated carbon and True HEPA in one cartridge
- Noise (maker)
- 20–48 dB
- Power
- 25 W
- Sensor
- Particle sensor with auto mode
- Warranty
- 3 years (maker's listing)
Which rooms it suits
Everyday: AHAM's room size. Smog: AHAM's advice for smoke, a CADR at least equal to the floor area in ft².
| Room | Everyday | Smog days |
|---|---|---|
| Bedroom · 15 m² (161 ft²) | ||
| Living room · 30 m² (323 ft²) | ||
| Large room · 50 m² (538 ft²) |
Our take
The Airmega 150 is Coway's bedroom purifier. Its smoke CADR of 153 cfm covers about 22 m², a little more than the Levoit Core 300, and it runs as low as 20 dB with the light off, quiet enough for a nursery.
The filters sit in one cartridge you swap as a unit, and a sensor drives auto mode. The colours (green, white, pink) are the point for some buyers; the figures hold up either way.
What's good
- 20 dB on low
- Particle sensor with auto mode
- 3-year warranty
What's not
- No app or Wi-Fi
- Not enough for a large bedroom
Replacement filter: Coway Airmega 150 replacement filterFind it on Amazon(opens in a new tab)
Good for
- Bedrooms and nurseries up to about 22 m²
- Light sleepers: 20 dB on its lowest setting
Skip it if
- The room is bigger than about 22 m²: the Mighty does 34 m²
How it compares
Every air purifier in the shop.
| Product | Best for | Smoke CADR | Room size | Price |
|---|---|---|---|---|
| Levoit Core 300S | Smart bedroom | 141 cfm | 20 m² | $149.99 |
| Levoit Core 300 | Budget bedroom | 143 cfm | 21 m² | $89.99 |
| Levoit Vital 100S | Pet-friendly bedroom | 143 cfm | 21 m² | $119.99 |
| Coway Airmega 150 (this one) | Small & quiet | 153 cfm | 22 m² | $189.99 |
| Levoit Core 400S | Shows PM2.5 | 231 cfm | 33 m² | $189.99 |
| Winix C545 | Everyday pick | 232 cfm | 33 m² | $209.99 |
| Coway Airmega AP-1512HH Mighty | Best overall | 233 cfm | 34 m² | $239.99 |
| Coway Airmega AP-1512HHS (Mighty with Wi-Fi) | Smart Mighty | 233 cfm | 34 m² | $299.99 |
| Coway Airmega 200M | Mighty's twin | 233 cfm | 34 m² | $229.99 |
| Levoit Vital 200S | Pet homes | 250 cfm | 36 m² | $169.99 |
| Honeywell HPA300 | No-frills power | 300 cfm | 43 m² | $269.95 |
| Coway Airmega 400 | Big rooms | 376 cfm | 54 m² | $649.00 |
| Levoit Core 600S | Large rooms | 391 cfm | 56 m² | $299.99 |
| Blueair Blue Pure 211i Max | Most clean air | 435 cfm | 63 m² | $349.99 |
| Filtrete MPR 1900 MERV 13 filters for a DIY box-fan purifier (4-pack) | Budget build | — | — | $87.99 |
In our buying guides
Questions about the Airmega 150
- What size room does the Coway Airmega 150 cover?
- About 237 ft² (22 m²). That's AHAM's room size for its smoke CADR of 153 cfm: the floor area, with an 8 ft ceiling, whose air it cleans about every 12.5 minutes.
- Is the Coway Airmega 150 enough for smog?
- For smoke and heavy smog AHAM suggests a smoke CADR at least equal to the floor area in square feet. By that measure the Coway Airmega 150 keeps up with a room of about 153 ft² (14 m²). Keep the windows shut and run it on high while the AQI is bad.
- Coway Airmega 150 or Mighty?
- The Mighty moves about 50% more clean air (233 against 153 cfm smoke CADR) for rooms of about 34 m². The 150 is smaller, quieter at its lowest setting and suits one bedroom.
How we judge. We haven't tested the Airmega 150 in a lab of our own. The figures come from independent ratings (AHAM, Energy Star, NIOSH, the ASPCA) or the maker, and the verdict is ours, from those figures. No brand pays to be listed. Last checked Nov 7, 2026.
Coway Airmega 150
$189.99 list price