Abstract: A heat exchange apparatus which utilizes the solar heat, hot spring water or underground water comprises a cylindrical main body, an internal cylinder placed in the main body, a blower provided in an upper part of the internal cylinder, an air intake, a number of radially arranged air exhaust tubes, ring shaped upper and lower heat exchange compartments, and chambers formed between heat exchange compartments, on and under the upper and lower heat exchange compartment, upper and lower chambers are connected by coil tubes placed in heat exchange compartments, the outer coil tubes and inner coil tubes are successively connected so that each of connected coil tubes has the same overall length, which improves efficiency of heat exchange between air and water which are caused to move in a counterflow fashion.