Our verdict
Pick the Winix D360 if you want the lower price. Pick the Winix C545 if it is the cheaper of the two on the day you buy.
The central trade-off
Filters. Winix D360 Air Purifier: Washable pre-filter, activated carbon filter and True HEPA filter.
Filters. Winix C545 Air Purifier: Pre-Filter.
Price. When we checked, the Winix D360 Air Purifier listed for less ($180 against $273); prices move, so check both buttons.
Side by side
| Specification | Winix D360 Air Purifier | Winix C545 Air Purifier |
|---|---|---|
| Rated room size | 361 sq ft (AHAM) | 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 | Not stated by the maker | 27 db |
| Power draw | Not stated by the maker | Not stated by the maker |
| Filters | Washable pre-filter, activated carbon filter and True HEPA filter | Pre-Filter |
| Warranty | 2 years | Not stated by the maker |
Values are the makers' published specifications. "Not stated" means the maker doesn't publish it.