Aluminium radiators are particularly well suited for use with geothermal and air-to-water heat pump systems, which operate most economically at output water temperatures typically between 35’C and 45’C. The multiple layers of fins incorporated into the design of aluminium radiators provide a much larger heat exchange area between the radiator and the air than is possible with standard steel radiators. As a result aluminium radiators transfer much larger amounts of heat at 35’C to 45’C than standard radiators would if operated in that temperature range.