WATER HEATING APPARATUS
Disclosed is a solar water heating apparatus comprising a central tank and one or more outer layerswherein at least part of the exterior of the outermost layer is adapted to be exposed to the sun. The outer layers also formwater pathways such that, when the tank is substantially filled with water, said water is able to circulate around a path formed by said central tank and the outer layers.A pulsing pump may help circulatethe water. An auxiliary heating element may be also provided, such as a small gas burner.