Our verdict
Pick the Coway Airmega 250 if you want the lower price. Pick the Coway Airmega 300 if your room is larger and running cost matters.
The central trade-off
Rated room size. Coway Airmega 300: 2,513 sq ft; Coway Airmega 250: 930 sq ft.
Power draw. Coway Airmega 300: 57 W; Coway Airmega 250: 64 W.
Filters. Coway Airmega 250: HEPA.
Filters. Coway Airmega 300: HEPA.
Price. When we checked, the Coway Airmega 250 listed for less ($399 against $549); prices move, so check both buttons.
Side by side
| Specification | Coway Airmega 250 | Coway Airmega 300 |
|---|---|---|
| Rated room size | 930 sq ft | 2,513 sq ft |
| Smoke CADR | Not stated by the maker | Not stated by the maker |
| CADR | Not stated by the maker | Not stated by the maker |
| Quietest setting | Not stated by the maker | Not stated by the maker |
| Noise | 22 dB | Not stated by the maker |
| Power draw | 64 W | 57 W |
| Filters | HEPA | HEPA |
| Warranty | Not stated by the maker | Not stated by the maker |
Values are the makers' published specifications. "Not stated" means the maker doesn't publish it.