Complete range of Relay Boxes to suit all systems, tailored for specific zone control applications. 5 x Standard models available and in addition we manufacture custom zone control Relay Boxes (RB-06) to suit large commercial installs. Easily available off the shelf components are used in our Relay Boxes to ensure easy replacement and maintenance. Our systems offer 24 Volt thermostat control and 240V actuator output. The zone control system can be configured to suit your design.