Home Slickdeals Costco: Winix True HEPA 4 Stage Air Purifier with Wi-Fi and Additional... Slickdeals Costco: Winix True HEPA 4 Stage Air Purifier with Wi-Fi and Additional Filter $99.99 By ARCOM - 22 October 2020 86 0 SHARE Facebook Twitter Go to the deal page: Costco: Winix True HEPA 4 Stage Air Purifier with Wi-Fi and Additional Filter $99.99