Primarily used for additional heating circuits, over and above the integrated heating circuit in the CC 8311 or CC 8313 mast controls Each heating circuit can be a traditional unmixed circuit The two heating circuits can either be controlled by the Bosch BFU room thermostat or by third party, volt-free controls. Designed to clip in to a master, slave or additional module control Easy to install, with high and low voltage connections separated and convenient visual aids and colour coding to assist installation Manufacturer Stock Code:8718598828 EAN Code:4054925629248 Sub-Category:Installation Accessories Brand:Bosch Category:Spares and Accessories