... of Cone exhaust fan features:1) Reasonable cone designing, low noise, big air flow, strong ventilation, low operating cost ... nibreaking, aesthetic durability.6) There are two types of fan house, slant wall type, upright wall type, could satisfy ... Width(mm)Thick(mm)XL-1100100060014003250075038011001100450XL-13801250439140044000110038013801380450 cone ventilation fan for greenhouse and poultry house