Our verdict
Pick the Coway Airmega 250 if it is the cheaper of the two on the day you buy. Pick the Coway Airmega 350 if your room is larger and you want the lower price.
The central trade-off
Rated room size. Coway Airmega 350: 2,640 sq ft; Coway Airmega 250: 930 sq ft.
Smoke CADR. Coway Airmega 350 states 352 CFM; the other's maker page doesn't.
Filters. Coway Airmega 250: HEPA.
Filters. Coway Airmega 350: HEPA.
Price. When we checked, the Coway Airmega 350 listed for less ($339 against $399); prices move, so check both buttons.
Side by side
| Specification | Coway Airmega 250 | Coway Airmega 350 |
|---|---|---|
| Rated room size | 930 sq ft | 2,640 sq ft |
| Smoke CADR | Not stated by the maker | 352 CFM |
| 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 | 21.5 dB |
| Power draw | 64 W | 62 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.