Stainless Steel Exhaust Cap - 8 Inch Round Rotating Wind Turbine Roof Vent, Unpowered, Easy to Install, Durable Flue Vent for Roof Applications

** This eco-friendly roof ventilator harnesses natural wind and the air-heat convection generated by temperature differences between indoor and outdoor environments. It efficiently rotates the turbine, utilizing centrifugal force and negative pressure to expel stale air from your space.**Material:** Crafted from durable 304 Stainless Steel for long-lasting performance.**Size Options:** Available in the following diameters: - 100mm (4in) - 150mm (6in) - 200mm (8in) - 300mm (12in) - 350mm (13.8in) - 400mm (15.8in) - 450mm (17.8in) - 500mm (19.6in) - 600mm (23.6in) The mounting nozzle is designed to be slightly smaller than the vent pipe, ensuring easy installation. Please consult the dimensional drawings to select the right size for your requirements.**Note:** Product measurements are taken manually and may have a variance of 2-3cm. Due to variations in lighting and screen settings, the product color may differ slightly from the images.

• 1. Constructed from high-quality 304 thick stainless steel, featuring a galvanized support frame and premium ball bearings for enhanced durability.
• 2. **Features**: Offers zero energy consumption and silent operation. Designed to be rainproof and rustproof, with high hardness and corrosion resistance, ensuring a long lifespan.
• 3. **Working Principle**: Operates using natural wind and thermal convection from the temperature difference between indoor and outdoor environments, which drives the turbine to effectively expel stale air from indoors.
• 4. **Installation**: Includes two types of installation accessories: a clamp for smaller sizes to eliminate gaps, and a 90° fixed foot for securely mounting larger units.
• 5. **Applications**: Ideal for use in ventilation ducts, chimneys, farms, factory rooftops, warehouses, and similar environments.