... Poultry house fan: 1.Big air volume,low noise 2.imported bearing, high strength, low noise and long service life Cone ... fan:1. Reasonable cone designing, low noise, big air flow, ... , aesthetic durability.6. There are two types of cone fans, slant wall type, upright wall type, could satisfy ... class: IP55, insulation class: F grade. poultry cone fan from Yihe