Electronic 7 Series 3 Immersion Heater Controller

• Compatible with most cheap rate or off-peak tariff structures
• Fully interchangeable with all past and present Economy 7 controllers
• Built in clock with automatic summer/winter hour change
• Up to three off-peak settings per 24 hours
• Programmable and manual boost
• Programme security feature
• Suitable for use with single, dual or twin-element immersion heaters

The Horstmann Electronic 7 is the digital equivalent to the renowned Horstmann Economy 7 Quartz timer and is designed for use with Economy 7 and other more recent cheap rate tariff arrangements. Where hot water is heated by off peak electricity it is important that the immersion heater controller offers ease of use coupled with the most efficient performance.