Our verdict
Pick the Winix 9800 if it is the cheaper of the two on the day you buy. Pick the Winix D480 if you want the lower price.
The central trade-off
Power draw. Winix 9800 Air Purifier states 95 watts; the other's maker page doesn't.
Filters. Winix 9800 Air Purifier: HEPA.
Filters. Winix D480 Air Purifier: Washable pre-filter, activated carbon filter and True HEPA filter.
Price. When we checked, the Winix D480 Air Purifier listed for less ($250 against $300); prices move, so check both buttons.
Side by side
| Specification | Winix 9800 Air Purifier | Winix D480 Air Purifier |
|---|---|---|
| Rated room size | 500 square feet | 498 sq ft (AHAM) |
| 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 | Not stated by the maker |
| Power draw | 95 watts | Not stated by the maker |
| Filters | HEPA | Washable pre-filter, activated carbon filter and True HEPA filter |
| Warranty | Not stated by the maker | 1 year |
Values are the makers' published specifications. "Not stated" means the maker doesn't publish it.