Lijan Greentech is Manufacturer, Supplier and Service Provider of Turbo Roof Ventilator Fans. We have mainly 3 different models. Top One Among the List is Heavy Duty Aluminium Roof Ventilator Fan having Throat Diameter 22". In this Model Ventilators Smooth Rotation is achieved using Hard Resistant Pin - Bush Mechanism. There are two Other Models with Bearing for Rotation, one in Aluminium and second one in SS 430. Both are having 24" throat diameter. We supply Ventilator Fans with GI Powder Coated Base either Flat or Profile Shaped depending on Type of Installation Requirement. Flat Base is the Best Choice considering Cost and 100% Water Proof Design. We Install Fans Upright to Ground Level Irrespective of Roof Slope.