Coway Airmega 450 vs Winix Tower XQ
A spec-only comparison using ENERGY STAR certification data. We have not tested either unit, and features like noise, filter price and build quality are not covered here.
- Cleaning speed: the Winix Tower XQ has the higher smoke CADR (461 vs 443 cfm, 4% more).
- Running cost: the Coway Airmega 450 uses less electricity per ENERGY STAR (389 kWh/yr), about $17.76/yr less at the U.S. average rate (estimate).
- Room size: by AHAM's 2/3 rule, up to about 664 sq ft vs 692 sq ft.
Both sit in ENERGY STAR data as Extra-large rooms (350+ cfm) units by smoke CADR. Listed differences: only the Winix Tower XQ is listed as connected (app/Wi-Fi); reported ozone is 0 ppb vs 1 ppb. Over 5 years at the U.S. average rate, the electricity difference is about $88.80 (estimate).
| Coway Airmega 450 | Winix Tower XQ | |
|---|---|---|
| Smoke CADR (cfm) | 443 | 461 |
| Dust CADR (cfm) | 445 | 482 |
| Pollen CADR (cfm) | 450 | 450 |
| ENERGY STAR room size | 687 sq ft | 715 sq ft |
| AHAM 2/3-rule room size | 664 sq ft | 692 sq ft |
| Annual energy | 389 kWh | 486 kWh |
| Est. electricity/yr (U.S. avg) | $71.23 | $88.99 |
| Smoke CADR per watt | 6.69 | 5.59 |
| Ozone (reported) | 0 ppb | 1 ppb |
| Technology | Fan and Filter | Fan and Filter |
| Filters listed | HEPA-Type | HEPA |
| Auto mode | Air Quality Sensor | Air Quality Sensor |
| Connected | No | Yes |
| Most Efficient | No | No |
| Source | ENERGY STAR record 4005917 | ENERGY STAR record 4572714 |
Purchase price and filter cost are not included (data gap). Electricity estimates use 18.31¢/kWh (EIA).
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See Coway air purifiers on the manufacturer's site (plain link, not an affiliate link)
See Winix air purifiers on the manufacturer's site (plain link, not an affiliate link)