Wind Turbines Exhaust Cap Roof Flue Vent, 4 8 10 12In Roof Ventilator, Galvanized Steel All Weather Roof Vent, Unpowered Rotation, for Houses Factory Attic Farm

Stainless steel rotor, chimney rotating cover, rotating cover ventilation, no power energy saving, turbines ventilation Material: 304 stainless steel Advantages: discharge indoor hot air and dirty air, purify the indoor environment Principles: 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×1 160mm (6.3 inches) ventilation cap×1, clamp×1 200mm (7.9 inches) ventilation cap×1, clamp×1 250mm (9.8 inches) ventilation cap×1, clamp×1 300mm (11.8 inches) ventilation cap×1, fixed foot×3 400mm (15.7 inches) ventilation cap×1, fixed foot×4 Package: Vent hood x 1 + Accessories

• Made of thickened stainless steel material, will not rust, , 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.