Horstmann E7BX Water Heating Boost

These simple controls are intended for use where cheap overnight heating of water is controlled by the Electricity Company's Radio Teleswitch, Radio Telemeter or tariff time switch.

• Simple to install and use
• Boost period adjustable between 0 and 120 minutes
• Neon indicator shows when boost timer is running
• Can be used with one or two immersion heaters
• Compatible with earth-leakage circuit breaker installations