YORK® turbines are ideal for the general ventilation of factories, farm and agricultural buildings, commercial and public structures and homes. Turbines move out hot, stagnant air automatically. They also work well in preventing condensation in buildings. Sensitive, ball bearing action enables the slightest motion of air to move the rotor head, and maintain suction even at low wind velocity. Centrifugal force, caused by the freely revolving head, creates a partial vacuum. Foul air rushes to fill the vacuum and is expelled. Turbines are available in galvanized steel or aluminum construction.