A continuing demand exists in commercial and industrial buildings for high velocity roof ventilators which exhaust foul air and disperse it high above the roof. The YORK® VU-Series is ideal for the “spot” ventilation of specific problem areas where rapid air removal is necessary or for general plant ventilation. This “plugin” or package ventilation is easily installed out of the way, up on the roof. It is accessible and yet does not use valuable interior areas nor does it require costly duct systems.