The conical hood is a device installed at the end of the exhaust system, which enhances the exhaust capacity by utilizing wind pressure and prevents rain and snow from entering the duct. The cylindrical hood is suitable for natural exhaust systems. When dripping is not permitted indoors but condensation droplets may form inside the duct, a drip tray should be installed below the cylindrical hood, and the droplets should be引流 through pipes to the discharge location.

The conical hood is composed of main components such as the upper conical cap, lower conical cap, upper umbrella cap, and lower umbrella cap.

The conical wind hood utilizes the natural wind speed of the environment to drive the turbine rotation of the fan and the principle of indoor-outdoor air convection, accelerating any parallel air flow and transforming it into a vertical upward air flow from bottom to top, thereby enhancing the indoor ventilation and air exchange. It operates without electricity, produces no noise, and can run continuously for a long time, removing indoor heat, humidity, and odors. Placed rationally at the top of the roof according to the natural laws of air and the principles of air flow, it can quickly expel indoor heat and polluted gases, improving the indoor environment.