The Power Plant has three major exhibition galleries and smaller, adjacent indoor and outdoor sites which lend themselves to virtually any presentation circumstance. The interior of The Power Plant is comprised of three major gallery spaces. The two largest, named the Royal LePage and J. S. McLean Galleries, are specifically designed for maximum flexibility and for the diversity of contemporary art. They feature nine-metre high ceilings and an adjustable grid lighting system. The third, named the Canadian Tire Gallery features three-metre high ceilings. In addition to the galleries, which share approximately 650 square meters, the Fleck Clerestory, a central corridor with a glassed roof, lobby and exterior spaces are also designated for exhibition purposes.