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Tariff 11 and hot water

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3 replies to this topic

#1 IamtheMumma

Posted 20 February 2020 - 01:35 PM

The new house is only metered for tariff 11. It has electric hot water. I'm used to solar or Tariff 31/33 (I've forgotten). Anyway I don't want to be paying a premium for hot water when I'll only use it for showering once a day and the dishes, which I can boil water to get.

Can I turn the power off to it and only heat it every other day? Is it going to damage the system?

#2 laridae

Posted 21 February 2020 - 07:23 AM

It's not going to damage it but it's probably not a great idea. The water temperature will drop, but probably not go cold in between. Dropping temperature is a risk for legionares disease.
Plus it'll use more power trying to heat it all back up than maintaining temp.
It could work maybe if you use all the hot water in your shower then turn it off straight after before it has a chance to heat up again. But then you need to make sure you give it enough time to heat back up.

#3 foom

Posted 21 February 2020 - 08:05 AM

Is it on a separate switch in the box? Can you get a quote for a new meter to be put on the hot water system, then switch to off peak? It's not cheap but if you are there for a decent length of time it might pay itself off.

Edited to add - they need to know which tariff it goes on before they put on the new meter.

Edited by foom, 21 February 2020 - 08:06 AM.

#4 IamtheMumma

Posted 22 February 2020 - 08:03 AM

I'd forgotten about Legionnaires. Good point.

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