Rotating Chimney Cowl, Non Power Roof Ventilator, Roof Ventilator Prevents Rain from Entering The Flue and Keeps The Fireplace Dry Strong and Durable(100mm/3.9in)

Adaptable: Base diameters ranging from 100mm to 500mm fit most standard chimneys, and the stainless steel construction is rugged and ready to install without complicated steps Efficient Ventilation: As a rotating hood for ventilation ducts and chimneys, the rotating design accelerates as the wind increases, enhancing ventilation and removing heat from the room Energy Saving: Utilizes natural wind and air convection principles, no need for electric power, saving energy and reducing electricity bills Protection function: Protectt the fireplace and chimney from the weather, especially rain, snow and wet weather, also preventt small animals, birds and other infestation, ensure the chimney unobstructed EASY INSTALLATION: Fully assembled and installed, one person can complete the installation, equipped with clips suitable for small diameter pipes, creating a safe and cozy environment for your family