1. Economical 2. Dependable 3. Great Value 4. Low cost installation Features1.Single, ... performance SMC cone fan are desiged for use in industrial,poulty,dairy,swine and greenhouse applicantion.3.The cone ... cone.2.Thick and corrosion resistance SMC housing with limited lifetime warranty .3.Rust-free,corrosion-free,smc ... 106*106*55CM smoke Ventilation Fan (for industrial,poultry farm,greenhouse ect)