Home Slickdeals Costco Members: Winix True HEPA 4 Stage Air Purifier w/ Wi-Fi +... Slickdeals Costco Members: Winix True HEPA 4 Stage Air Purifier w/ Wi-Fi + Extra Filter $100 + $4 S/H (valid 3/8 – 4/2) By ARCOM - 9 March 2023 27 0 SHARE Facebook Twitter Go to the deal page: Costco Members: Winix True HEPA 4 Stage Air Purifier w/ Wi-Fi + Extra Filter $100 + $4 S/H (valid 3/8 – 4/2)