immersion heater question

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immersion heater question

Post by Coupe Racing » Tue Apr 21, 2020 9:24 am

A question to the wise please.

currently , my Immersion heater is controlled by a timer.
Most of my hot water usage - IE shower , dishwasher , washing machine etc are cold water fed.
However now I'm at home for the foreseeable future , I am running out of hot water during the day.

The question:
If the Immersion heater is left permanently ON , will it regulate itself and only heat the water when required ?
I'm in fear of running up an un-necessary electric bill.

Many thanks

Steve


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immersion heater question

Post by David Tew » Tue Apr 21, 2020 9:40 am

Hi Steve,
The immersion heater does have a thermostat built in so it will keep the water at a set temperature. The thermostats do fail occasionally but are easily changed. There is a theory that, presuming well insulated storage, it's cheaper to keep a quantity of water hot than heat it from cold - that's the principle of boiling water taps in kitchens.
If you're concerned about leaving it on permanently, just extend the timer on/off periods to, say, 1 hour on / 1 hour off.
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immersion heater question

Post by philhoward » Tue Apr 21, 2020 9:43 am

They’re thermostatically controlled anyway? It will keep maintaining the water temperature even when you’re not going to use it so I’d alter the timer to be on more often - or does it have a “boost” function, turning it on for an hour or so every time you prompt it?

All depends on your timer


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immersion heater question

Post by Coupe Racing » Tue Apr 21, 2020 9:43 am

The current period provides good hot water for the duration of operation.

I will monitor and see how things go leaving it on.

Many thanks


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immersion heater question

Post by Coupe Racing » Tue Apr 21, 2020 9:44 am

philhoward wrote:
Tue Apr 21, 2020 9:43 am
They’re thermostatically controlled anyway? It will keep maintaining the water temperature even when you’re not going to use it so I’d alter the timer to be on more often - or does it have a “boost” function, turning it on for an hour or so every time you prompt it?

All depends on your timer
Hi Phil

its a basic timer , so only 2 x on/off

Thanks for the thoughts


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immersion heater question

Post by philhoward » Tue Apr 21, 2020 9:44 am

Beaten by David but I think we’re saying the same thing of sorts 8)


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immersion heater question

Post by philhoward » Tue Apr 21, 2020 9:47 am

For years I ran one off a plug in timer with those 96 segments - but depends if you have a 13A socket nearby and happy rewiring it to a normal 13A plug? Then you can set it to come on for half an hour every 4 hours during the day.

Check the heater but they’re usually 2kw or 3kw - within the scope of a 13A setup.


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immersion heater question

Post by Coupe Racing » Tue Apr 21, 2020 10:15 am

Yes there is a 13A socket there .
Today I have set up an energy monitor .
After a few days I will change the settings on the Immersion heater to permanently on and compare the readings
I expect a small increase but if its massive then I will change the timer


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immersion heater question

Post by Drury » Tue Apr 21, 2020 10:31 am

Yes, it has a thermostat (water will boil if it's faulty.



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