Room controller for wall mounting with closed housing cover, also known as an authority controller. Suitable for controlling central heating, hot water underfloor heating, electric heating, night storage heating, etc. The room temperature is set under the housing cover and is therefore protected against unauthorized adjustment. Bimetal technology with thermal feedback and high precision. Temperature reduction possible via external timer. Surface mounting or directly on flush-mounted box with vertical mounting holes or with snap-on mounting on DIN rail.