1)24 In. 1/2 h.p ; 2)Variable Speed ; 3)HIGH PERFORMANCE ; 4)Air Delivery7,000CFM; Variable Speed 1. Durable one-piece molded polyethylene housing.2. Equipped with high performance 1/2 h.p. variable speed motor.3. Fan blades designed by aerodynamic provide a maximal air performance.4. A low noise level is another advantage obtained by the special layout.5. PVC Shutters and all accessories are ...