tornado 20-inch high velocity wall fan - outdoor rated, ipx4 water-resistant, 3-speed, 4750 cfm - industrial, commercial & residential use, perfect for greenhouses, ul safety certified black 20 inch is up for auction in Patio, Lawn & Garden. The current bid is $1.50, 99% below the $109.98 MSRP, in As Is condition. This auction has ended — similar items appear in live auctions regularly.