With high-quality construction and three-speed control, the 18" F5 Industrial Floor Fan provides optimal air circulation for your entire grow room. The blowing angle is adjustable (angle of elevation can be vertical). Characterized by such advantages as powerful wind-flow, smooth angel adjustments, low noise, low heat, electricity-saving, low center of gravity, easy to move, and a sturdy protective guard of the helical dense web, which presents itself as both safe and beautiful.