As the hot water tank has two elements I’d rather one dual boost switch rather than two single boost switches. The only alternative I can think of is to use the original switch with one single boost switch. Which would be a bit clunky.
so if you put it into the circuit prior to the switch it will be straightforward.
No. There are two elements. One at the top of the cylinder and one at the bottom. Hot water rises so the top will have all the hot water first so disabling the top element earlier.So, in theory, if you turn on the bath element for 15 minutes, you only heat enough water to fill the sink. The element itself is just as efficient as a sink element, i.e. either one of them turned on for the (small) amount of time will heat the same volume of water, up to a point.
I could be wrong, and the smaller element heats up faster and is therefore more efficient for smaller quantities. Leo, do you know (you seem to know a lot more about it than me)?
No it will take longer to heat the water at the bottom because as it rises the cold water remains at the bottom. The bottom element will always be trying to heat cold water. If the top element is used it will heat up the same water when it's cold tepid warm and hot.So, my question still stands, why not just use the bottom element combined with the new timer? Set the timer for 15 minutes for a sink, and 2 hours for a bath?
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