KAnduo Stainless Steel 304 Non Power Roof Ventilator, Roof Wind Turbines Cap Vent, 8 10 12Inch Vent Automatic Rotation By Wind/air Flow No Consumption, Easy To Install (Size : 250mm/9.8in)

Stainless steel rotor, chimney rotating cover, rotating cover ventilation, no power energy saving, turbines ventilationMaterial: 304 stainless steelAdvantages: discharge indoor hot air and dirty air, purify the indoor environmentPrinciples: Utilize natural wind and indoor temperature difference, air -to -flow drives turbines rotation. Eliminates the old air in the room with centrifugal force and negative pressure.Application: For the ventilation of exterior walls such as bathrooms, kitchens, warehouses, residences, apartments, etc.Size - The package includes:110mm (4.3 inches) ventilation cap×1, clamp×1160mm (6.3 inches) ventilation cap×1, clamp×1200mm (7.9 inches) ventilation cap×1, clamp×1250mm (9.8 inches) ventilation cap×1, clamp×1300mm (11.8 inches) ventilation cap×1, fixed foot×3400mm (15.7 inches) ventilation cap×1, fixed foot×4Package:Vent hood x 1 + Accessories

• ▶Made of thickened stainless steel material, will not rust, durable, long service life. Easy to clean.
• ▶The roof wind smoke exhauster, galvanized support frame and high-quality ball bearings, zero energy consumption, flexible rotation, firmness and strong pressure resistance.
• ▶Use the natural wind and air thermal convection caused by the temperature difference between indoor and outdoor to drive the turbines to rotate and exhaust the stale indoor air.
• ▶Applicable to chimneys, farms, factory roofs, ventilation ducts, houses, warehouses, etc. easy to install.
• ▶The fan can be installed on a slope of 0-22.5 degrees, flat or inclined. High exhaust efficiency.