Our verdict
Pick the PuroAir 240 if running cost matters. Pick the Winix 5510 if your room is larger and you want the lower price.
The central trade-off
Rated room size. Winix 5510 Air Purifier: 1881 square feet; PuroAir 240 HEPA Air Purifier: 1,000 sq ft.
Power draw. PuroAir 240 HEPA Air Purifier: 45 W; Winix 5510 Air Purifier: 65 watts.
Filters. Winix 5510 Air Purifier: HEPA.
Price. When we checked, the Winix 5510 Air Purifier listed for less ($180 against $200); prices move, so check both buttons.
Side by side
| Specification | PuroAir 240 HEPA Air Purifier | Winix 5510 Air Purifier |
|---|---|---|
| Rated room size | 1,000 sq ft | 1881 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 | 22 dB | 27 db |
| Power draw | 45 W | 65 watts |
| Filters | Not stated by the maker | HEPA |
| Warranty | 2 years | Not stated by the maker |
Values are the makers' published specifications. "Not stated" means the maker doesn't publish it.