Home Slickdeals Winix Replacement Filter Pack for C535 and C909 Air Purifiers, 2-pack –... Slickdeals Winix Replacement Filter Pack for C535 and C909 Air Purifiers, 2-pack – $69.99 By ARCOM - 18 May 2023 27 0 SHARE Facebook Twitter Go to the deal page: Winix Replacement Filter Pack for C535 and C909 Air Purifiers, 2-pack – $69.99