Ceiling apparatus for heating or cooling a space includes one or more spiral shaped coils mounted to individual thermally conductive ceiling tiles suspended above the space to be heated or cooled. The method comprises applying a charge to the carbon nanotube, and providing a repelling force to an adjacent structure from the carbon nanotube to which the charge has been applied. The bracing web members are slidably receivable within the U-shaped cross section and can be secured to the depending legs by suitable fasteners.