Good quality shuttered push-pull type ventilating fan for greenhouse/poultry house

Special push-pull shutter mechanism can open and close shutter automatically.Stainless steel blade adopted one punch forming technology. Big air flow, no broken, no dust and attractive and durable.  
Unique concave handling design of exhaust fan not only helps avoid inconvenience occurred in the transport, but also keep favorable installation and beautiful exterior.
V-belt is made of high-strength and light-weight aluminum magnesium alloy, formed by heat press processing.