Rotating Vent Cap, Wind Turbine Ventilator, 304 Stainless Steel Exhaust Cap, Outdoor Vent, Zero Consumption, Ducting External Extractor, for Factories, Farms, Chimney (160mm)

House Chimney Ventilation Cap Material: 304 thick stainless steel Size: Diameter 110mm (4.3 inches) 160mm (6.3 inches) 200mm (7.9 inches) 250mm (9.8 inches) 300mm (11.8 inches) Note: This is an anti-downdraught cowl. A downdraught is only wind generated. If the problem(smoking fireplace/stove) exists when there is no wind, then the problem is not a downdraught. Warning: If your chimney is more than 1 meter below the apex of your roof any anti downdraught cowl can become ineffective. Typical Downdraught Symptoms: smoke/fumes puffing out of the fireplace or stove when the wind blows. Since our size and pictures are taken by artificial entities, there may be an error of 1-2 units between the actual object and the size due to the display and light. Please understand.

• Turbine features: zero consumption, zero noise, rainproof, anti-rust, high hardness, anti-corrosion, and long service life.
• Ventilator Material: Made of 304 thick stainless steel, galvanized support frame, and high-quality ball bearings.
• Working Principle: Using natural wind and air thermal convection caused by the difference between indoor and outdoor temperature, the turbine is driven to rotate and the stale indoor air is discharged.
• Installation: The hood is equipped with two installation accessories, a clamp and a 90° fixed foot. Small sizes can be installed with clamps to prevent gaps, and large sizes can be fixed with 90° fixed feet.
• Uses: suitable for chimneys, farms, factory roofs, ventilation ducts, warehouses, etc.