Our verdict
Pick the Winix 5510 if it is the cheaper of the two on the day you buy. Pick the Winix 5520 if running cost matters.
The central trade-off
Power draw. Winix 5520 Air Purifier: 50 watts; Winix 5510 Air Purifier: 65 watts.
Filters. Winix 5510 Air Purifier: HEPA.
Filters. Winix 5520 Air Purifier: HEPA.
Side by side
| Specification | Winix 5510 Air Purifier | Winix 5520 Air Purifier |
|---|---|---|
| Rated room size | 1881 square feet | 1,882 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 | 27 db | 27 db |
| Power draw | 65 watts | 50 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.