Horstmann ELECTRONIC 7 Immersion Heater Controller Economy 7 For control of 'off peak' type water heater installations Automatic clock adjusts to accommodate GMT/BST summer/winter time.
Horstmann Electronic 7 Water Heater, Multi
Horstmann Secure E7+ Smart Immersion Heater Control - Economy 7 & Electronic 7
Horstmann Economy 7 Quartz Immersion Water Heater Controller Programmer Timer
Horstmann Economy 7 Quartz Water Heater Control Genuine Replacement Unit
Horstmann Centaurstat 7 Programmable Room Thermostat
