Description Dry an average size room in just minutes with this new Windshear Downdraft drying technology. This new air mover from Tornado pulls drier, warmer air from above, driving it down and out across the entire surface of the floor. One Downdraft will dry an entire room in as little as 15 minutes, making drying rooms one section at a time a thing of the past. 3500 CFM 2-speed motor rated for continuous duty.