Universal Sunheater Solar Heating System for Above Ground or Inground Spas, Black. Simple installation; for in-ground or above-ground pools. Installs on ceiling, shelf, ground or fence. Patented design for maximum exposure to the sun’s rays. Uses existing pool pump. Raises pool water temperature 6 to 10 degrees F. Additional kits or plumbing may be required. 240 x 27 x 3 inches.