Our verdict
Pick the Winix 9800 if your room is larger. Pick the Winix 5500-2 True HEPA Air Purifier if running cost matters.
The central trade-off
Rated room size. Winix 9800 Air Purifier: 500 square feet; Winix 5500-2 True HEPA Air Purifier: 360 square feet.
Power draw. Winix 5500-2 True HEPA Air Purifier: 70 watts; Winix 9800 Air Purifier: 95 watts.
Filters. Winix 9800 Air Purifier: HEPA.
Filters. Winix 5500-2 True HEPA Air Purifier: HEPA.
Side by side
| Specification | Winix 9800 Air Purifier | Winix 5500-2 True HEPA Air Purifier |
|---|---|---|
| Rated room size | 500 square feet | 360 square feet |
| 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 | 26.2 db | 27.8 db |
| Power draw | 95 watts | 70 watts |
| 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.