Retrofit Wind Turbine Noiseless Mill Finish Aluminum 12 inches

Designed to replace old turbine vents and fit over an existing base Leveling is not required, the aura ventilator retrofit can be installed parallel to the roof Built-in inner vertical louvers has an 1/8 in. opening between the louvers to keep out insects, birds and squirrels from entering the vent while allowing optimal air flow and no maintenance The Aura Gravity Vent Retrofit does not need to spin in order to provide excellent ventilation. Instead, it pulls hot air with its louvers because of the Venturi Effect. These vertical louvers continually exhausts air with no moving parts, while preventing rain and snow from entering. The vertical louvers also keep out insects and animals allowing for optimal air flow. In addition, the round design is aerodynamic to withstand wind speeds up to 200 mph.