Control unit for decentralised individual room control incl. return temperature limit for floor and wall heating systems in combination with a radiator installation. Consisting of: Wall installation module with pre-configurable control valve, pre-configurable RTL valve and thermostat valve, including bare-wall protection system and connection adapter 3/4" Eurocone, installation depth: 65-90 mm. Caution: Can only be used in combination with the TECEfloor design RTL box fine installation set 77470020 or 77470021 (please order separately).