Centralised junction for all underfloor heating wiring JG Underfloor Controls heating 240v wiring centre is an all-in-one junction box for underfloor heating systems. Essential for centralising underfloor heating wiring, the wiring centre features 8 zone connections and is easily mounted and wired with a fully labelled circuit board. All connections are hard wired for zone valves (for additional radiators or hot water motorized valves), actuators, pump and room thermostats. When used with the JG Underfloor Controls gateway and app, underfloor heating and hot water can be remotely controlled on the go.