With control of the circulation pumps savings you save electricity and heating in hot water, reduce significantly the burden of carbon dioxide emissions and thus the environment. The circulation pump saving controller is designed for use in single or multiple dwelling. Two sensors monitor the temperature in the hot water cycle. The temperature sensors can be attached to plastic or metal piping systems. When a change (after pre-selected time intervals, it is 4 Hours and occurs modes selectable), then the circulation pump is switched on. The pump is either turned off by the set operation time, or by warmed up sufficiently the return pipe. The control switches the pump off completely at night in order to achieve the greatest possible energy savings. This nocturnal sleep time can be adjusted individually. The existing circulation system can be easily prepared by and is done with a few simple steps. Interference in the water installation is not required. For most home installations, the dev