Below is a list of Cooling Tower Systems manufacturers from overland-park,. Cooling tower systems, sometimes referred to as heat rejection devices, provide cooling of water and other fluids through the removal of heat from the fluid. Essentially, a cooling tower is comprised of a water tower and a water reservoir pumping system. Cooling towers systems can be constructed from several construction materials, such as concrete, fiberglass, galvanized steel, stainless steel and wood; each material presents its own advantages.