Designed for use with Economy 7 off-peak rate overnight electricity plans with the flexibility of pre-selected timing options manually adjustable to allow customised programming. Alternatively, press the Boost button for instant ON/OFF. Features Interchangeable with Sangamo and Horstmann Economy 7 units. Suitable for use with single, dual or twin element immersion heaters. Designed for use with Economy 7 off-peak rate overnight electricity plans. 4 Boost demand options – 15, 30 minutes, 1 & 2 hours.
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