Winix C535 air purifier filters

Winix C535: the hepa filter is part 115115, and the air filter is part 1712-0094-00. Source: Winix, checked November 6, 2026.

1HEPA filter115115

Part numbers come from Winix (source 1, source 2, source 3, source 4, source 5), checked November 6, 2026. Amazon buttons open a search for the part number; we may earn a commission.

Where the model number is

On a label on the bottom or the back of the purifier.