Home Slickdeals Bionaire Twin Window Fan, Costco.com, $34.99 + tax until 6/21/20 Slickdeals Bionaire Twin Window Fan, Costco.com, $34.99 + tax until 6/21/20 By ARCOM - 9 June 2020 178 0 SHARE Facebook Twitter Go to the deal page: Bionaire Twin Window Fan, Costco.com, $34.99 + tax until 6/21/20