Electronic room temperature controller unit with changeover contact. The changeover contact is potential-free. The switching contact changes when the set temperature is reached. The rated current for the normally open contact is 10 A, while the rated current for the normally closed contact is 5 A. It does not include a spread mounting. The temperature controller is classified as Class 1. The power consumption (standby) is < 0.15 W. To connect with hot water heating systems, control valves that are normally closed are required for the controller. When connecting the normally open contact, a control valve that is normally open is needed. It is important to note that the switching point accuracy of the temperature controller is only achieved after approximately 1-2 hours of operation following installation.