Header panel assembly for preventing air circulation above electronic equipment enclosure

A hot/cold aisle containment system, comprising:

• (a) a frame structure adapted to be at least partially covered by one or more panels to define an interior space, the frame structure including a first vertical member, a second vertical member, and a horizontal member, wherein the horizontal member is supported directly by the first and second vertical members;
• (b) at least one electronic equipment enclosure installed at least partially within the frame structure such that the first and second vertical members are on opposite sides of the at least one electronic equipment enclosure and the horizontal member of the frame structure extends from one side of the at least one electronic equipment enclosure to the other;
• (c) a header panel assembly installed between, and supported by, a top of the at least one electronic equipment enclosure and the horizontal member of the frame structure to prevent circulation of air above the enclosure, the header panel assembly including a main panel and a first seal;
• and
• (d) a side seal assembly installed between a side of the at least one electronic equipment enclosure and the first vertical member of the frame structure to prevent circulation of air around the enclosure, wherein the side seal assembly includes a vertical support bracket and a second seal, the vertical support bracket being adapted to support the side seal assembly from the first vertical member of the frame structure.