Air Vent Air Hawk 18.4 in. H x 12 in. Dia. Weatherwood Aluminum Turbine and BaseWind Turbines are a type of attic exhaust vent that make up half of a balanced attic ventilation system for each roof. Intake vents make up the other half of the system. Together they help remove any built up heat and moisture inside the attic for year round ventilation. A non electric alternative to ventilation, turbine vents use the natural force of wind and air pressure to spin and vent out stale attic air. They do it with a series of specially