... indoor soot, smoke, odor, moisture, heat, decorative harmful gas, dust, human metabolism and other dirty volatile mixed-doped ... health and enhances the working efficiency. It is widely used in warehouse, toilet, factory, workshop, stadium, tennis hall, assembly ... Stainless steel Amount of Blade: 29PCS Total Height: 620mm Turbine Diameter: 720mm Ventilation Diameter: 600mm Base Plate Dimension: 780mm ...