insulation forming the periphery of the opening for reflecting the sun 39 s rays toward the inside of container 20 or if the black body re radiating heat toward the center of container 20 by the change of ray 39 s spectrum to infra red the same as occurs with black body bottom plate 85 this material also separates the inner high temperature chamber from the frame 11 thereby preventing the high temperatures from causing any impregnated resins in the wood if used from oozing out and staining the underside of the glass of the structure and container 20 a removal of pipe line 92 installed between inlet 33 and outlet 34 the container top is made of clear glass or plastic with sides 42 and bottom plate being of reflective material the sun 39 s rays pass through the top of container 20 and are reflected off sides 42 all to black bottom plate 85 traveling through the water partially heating it upon hitting black bottom 85 the rays are changed by the bottom plate 85 into infra rd and heat radiates directly off into the water water circulates through container 20 b container 20 could be provided with black body metal or material on.