1)24 In. Variable Speed; 2) HIGH PERFORMANCE; 3)Cools 1,800 sq. ft; 4)Portable evaporative cooling fan; Variable Speed 1. Durable one-piece molded polyethylene housing.2. Equipped with high performance 1/3 h.p. variable speed motor.3. No need to install, portable, could be used immediately after connecting water and electricity.4. Efficient environmental protection, evaporated with water without ...