Patent ID: 8776780

Claim:
A pool heating system comprising: a pool of liquid to be heated; a building structure having an interior and an exterior with a roof having a slope forming a boundary between the interior and the exterior, the interior including attic space subject to solar heating, the attic space in communication with the exterior of the building structure through an opening; the roof forming an overhang around the periphery of the building structure, the overhang having a soffit; a plurality of air inlets in the soffit of the overhang in communication with the attic space; an air-to-liquid heat exchanger on the building structure exterior such that heated air exiting the attic space through the opening passes through the heat exchanger and positioned adjacent to and down the slope from the opening or laterally spaced apart from the opening, such that any liquid leaking from the heat exchanger will not enter the opening into the interior of the building structure; a liquid pump for moving liquid from the pool through the heat exchanger; a first conduit between the pump and the heat exchanger; a second conduit between the heat exchanger and the pool; and the first and second conduits feeing attached to the exterior of the building structure and not entering the interior of the building structure such that any liquid that leaks from the conduit is on the exterior of the building structure and may not pass to the interior.