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Thanks. However, thinking about it I don’t need the ‘boost’ facility, it’s redundant with my new tariff. Can I just not connect the ‘boost’ heater element or do I need both connected?

Last year I had a new immersion heater installed and it came with an E7 timer switch. This year I’ve switched to an Agile electricity tariff and to take the best advantage of this I need a WiFi enabled smart timer/switch. The problem is that the current timer switch controls two heating...