1. Unoperated Roof Vent Utilizing the convection principle of natural wind and air, the turbo fan accelerates parallel airflow into vertical airflow, enhancing indoor ventilation. As hot air rises and cold air descends, the fan rotates, effectively expelling internal heat, odors, and dust. Energyefficient with no electricity consumption, it helps reduce your power bills. 2. Versatile Functions as a rotary hood for ventilation ducts, chimneys, and exhaust systems. The lacing offers maximum protection without compromising chimney performance. Ideal for chimneys that are infrequently used. Features a stainless steel structure with thickened fixed feet and includes a complete mounting kit. 3. Protection Made of thick stainless steel, the rotating chimney hood resists sinking and suits most standard chimneys. effective in wind resistance and ventilation enhancement. Shields your chimney from rain and moisture, making it especially suitable for chimneys with low usage frequency. 4. Noiseless Rainproof The roof vent operates silently. The closely spaced downwardprotruding slats prevent rainwater from entering the ventilation system. The winddriven rotating design ensures stronger airflow—the harder the wind blows, the faster the blades spin, boosting air extraction from inside out.