The Rotating Head Turbo Ventilators are powered by cost free air, boosts the natural up-flow of hot and contaminated air. Typhonic ball bearing action enables the slightest motion of air to rotate the turbo heat. Air is drawn into the throat of the ventilator from the building causing continuous ventilation. Warm air rushes up to fill this vacuum and is expelled into the outside atmosphere, even in low wind conditions. No opening in any position of the ventilators will funnel air back into a building.