This is a very common myth. But in fact, you really don’t need to be heating your water all the time. Your immersion heater or boiler will heat up hot water which is stored in a tank. As long as the tank has a good insulating jacket, it will keep the water hot all day, without needing to be constantly reheated.
So we would definitely not advise leaving your immersion heater on 24/7. This is because it is heating your water using kWh priced at around 13p. Whereas if you used your boiler it would be around 3-4p. Immersion heaters should only really be used when the boiler is not working, or you need an urgent boost due to high usage.
Immersion heaters should only really be used when the boiler is not working, or you need an urgent boost due to high usage. For maximum efficiency make sure you have a cylinder thermostat so the water isn’t being heated beyond the required temperature. There is one more fact that has been omitted in these discussions.
Definitely do not leave the immersion on all the time unless it’s on a timer (e.g. a night rate timer whereby it will heat for a few hours on the night rate giving you a full tank for the next day)!
Is it OK to leave immersion heater on all the time?
Do not leave your immersion heater running all the time. No matter how well-insulated the immersion tank is, it will still lose heat and the drop in water temperature will cause the immersion heater to run repeatedly (like your kettle coming back to the boil over and over again).
What is the most efficient way to use an immersion heater?
By turning off the heater when not required you’re reducing the average temperature of the tank (over time) and therefore, by definition, the heat losses – and therefore saving energy.
What happens if you leave the immersion on?
When the water boils the cylinder will make loud noises and push the boiling water into the cold tank in the attic. The water coming out of the cold tap will also be boiling.” So, there you have it folks. Leave it on = scalding yourself or breaking the thing.
Is it better to turn immersion heater off?
An immersion heater is often used to accompany the primary source of heat – the boiler. Explain to the consumer that in this type of installation it is best to keep the immersion heater turned off unless absolutely needed.
Can you leave immersion heater on overnight?
Hi Katie, Immersion heaters have a thermostat which turns them off when they reach the target temperature. Leaving it on for a few hours is enough for it to warm up and so it will be no different to leaving it on overnight.
Will an immersion heater turn itself off?
An immersion heater with thermostatic control will automatically turn itself off when the water reaches your desired temperature. Then turn it back on if the temperature cools too much.
How much does it cost to leave an immersion on?
Immersion heaters use electricity to heat water, which is considerably more expensive than gas. For example, 1 kW of gas will cost you around 4p, while 1 kW of electricity will cost around 15p. That means a 6 kW immersion heater would cost 90p an hour to operate, substantially more than operating a gas combi boiler.
Can immersion heaters overheat?
An overheating immersion cylinder will normally show obvious warning signs. Serious incidents like these are therefore likely to be extremely rare.
What happens if immersion heater left on?
If you do leave it on constantly, there are two main problems that may occur: The immersion may stop working completely. The water in the cylinder may boil. The cylinder will then push this boiling water into the cold water tank in the attic.
Can you leave an immersion heater on overnight?
Hi Katie, Immersion heaters have a thermostat which turns them off when they reach the target temperature. Leaving it on for a few hours is enough for it to warm up and so it will be no different to leaving it on overnight.
Should immersion heater be left on all the time?
This is a very common myth. But in fact, you really don’t need to be heating your water all the time. Your immersion heater or boiler will heat up hot water which is stored in a tank. As long as the tank has a good insulating jacket, it will keep the water hot all day, without needing to be constantly reheated.
Is it cheaper to leave the immersion heater on or turn it off?
This topic comes up in discussion forums all the time, but it is not cheaper to leave the immersion on all of the time, rather than to switch it on and off as required. Even with a good lagging jacket, the cylinder will lose heat and cost more to reheat the water to the optimum temperature.
More Answers On Should An Immersion Heater Be Left On All The Time
Immersion Heater, leave on or turn off advice please?
but i proved it by monitoring the electric usage over 6 months – and to be honest it was cheaper to leave the immersion on due to the fact the when the immersion was switched on and off it used more electric to heat the water (rather than leaving the heater on, it just continually heated water when required after using some hot water when the …
Should an immersion be left on all the time – Askaboutmoney.com
Definitely do not leave the immersion on all the time unless it’s on a timer (e.g. a night rate timer whereby it will heat for a few hours on the night rate giving you a full tank for the next day)! Satanta Registered User Messages 1,574 30 Jan 2007 #6
keep your immersion heating on all the time or only when needed?
Electric immersion cylinder’s usually have two elements one at the bottom of the cylinder which is left on all the time and set at a higher temperature heating the whole cylinder at night at E7 rates and one at the top heating a small amount of water if the whole cylinder is used which should be enough to wash your hands and wash the dishes with.
How to use an immersion heater | Plumbing tips
The off-peak immersion heaterwill be the one lower down the cylinder and should be left on all the time when hot water is required. The off-peak immersion will automatically use cheaper electricity over night to heat the water.
What actually happens if you leave the immersion on
They shared the following wisdom with us. “The main problem with leaving an immersion on constantly is that the immersion thermostat will be constantly switching on and off. After so many hours the…
Immersion heater – leave on or heat up when needed? – PistonHeads
“It’s best to leave your immersion heater on 24 hours a day. Myth or Truth? MYTH. It’s always best to place the water heating on a timer, as the energy lost from a hot water tank depends on the…
Immersion Heater – What is it, and how does it work?
Apr 18, 2022There is no need to leave your immersion heater on all day. By using an automatic thermostat you can set the times that you want hot water. As we identified above, this can be a great way to optimise your costs and leverage off-peak rates. In addition to this, a well-insulated immersion heater can remain hot for a few hours.
Immersion Heater – on or off or on or off — Digital Spy
Then leave the heater on over a period of say 7 days. Read the meter. Then do the alternative for 7 days. Read the meter. Least electricity usage wins. Not that easy, that depends on what other…
Immersion element on all the time? | YBW Forum
There is no technical reason the immersion cannot be on all of the time, other than the heavy load it imposes on your wallet. 24 Dec 2020 #6 W William_H Well-known member Joined 28 Jul 2003 Messages 12,818 Location West Australia
Does leaving immersion heater on leave a tenant fully … – LandlordZONE
Aug 18, 2020The electric boiler in my rented flat recently started leaking at the bottom and had to be replaced. According to the landlord, this is because we had left the immersion heater on the entire time. He has now charged us the full cost of replacing the boiler with a new one. I realize now that it was wrong to leave the heater on.
When should I use my electric immersion heater? – TheGreenAge
So we would definitely not advise leaving your immersion heater on 24/7. This is because it is heating your water using kWh priced at around 13p. Whereas if you used your boiler it would be around 3-4p. Immersion heaters should only really be used when the boiler is not working, or you need an urgent boost due to high usage.
Immersion Heater – Detailed guide for competent homeowners
Jul 10, 2021Q: Is it cheaper to leave the immersion on all the time? No. To run an immersion heater is quite costly. If you are on holiday turn it off. If you also have a gas boiler that can be used instead to heat the water use the boiler. You can see on your meter how fast is spinning when you turn on your immersion heaters.
Immersion heater advice needed – AVForums
The better the insulation, the slower the process. An immersion heater will automatically switch to replace that heat when the water cools to a pre-set temperature. You don’t need hot water during the night, but you do need it in the morning. So any power used to keep it hot overnight is wasted.
Is it cheaper to leave your heating on all the time or turn it on and …
The cheaper to run immersion could be on all night as the thermostat on the hot water tank will stop it producing hot water when the required temperature is met, however we would normally suggest running the ’cheaper’ immersion a couple of hours per night and only running the day time immersion when there is an absolute emergency for hot …
Immersion Heater: All you need to know – Selectra
7 days agoMany people refer to the cylindrical-boiler-like contraption in the hot press as the immersion heater, but actually, the immersion heater is an electric water heater that sits inside the cylinder (also known as the immersion tank). Strong currents of electricity pass directly into the immersion heater, which then uses the energy to warm the …
Immersion Heaters: Benefits, Costs & Free Hot Water – Boiler Guide
Feb 9, 2022To combat this, many households leave their immersion heater on all the time. So they always have hot water. But this will add to your electricity bills. We advise insulating the cylinder to keep the water warm for longer. But fitting a thermostat and timer alongside the immersion can help to keep energy use under control.
Immersion Heaters – Which?
May 25, 2022Use an immersion heater timer to turn the heater on and off so hot water is ready when you need it. If you have a time-of-use tariff, such as Economy 7, set your immersion heater to switch on when electricity is cheaper. Pros and cons of immersion heaters. Pros. Immersion heaters are separate from your boiler.
Immersion Heater Maintenance: How To Maximize Lifespan & Efficiency
Routine checkups should be performed, even when your immersion heater is functioning properly. It is more effective and inexpensive to be proactive with the care of your heater than to wait for symptoms to occur. Turn off the power. Before removing your immersion heater you must ensure it is turned off. If the heater is left on it can create a …
Is It Cheaper To Leave Hot Water On All The Time?
Apr 1, 2022It is a myth that leaving your hot water on all of the time will save you money. Unless you need a constant supply of warm water, your boiler will be constantly heating when there is no real need. It is cheaper and more energy-efficient to switch your boiler on, only when you need the hot water. But, as you can see from my experiment above, the …
Immersion heaters- the right way – EUA
Turn it off. An immersion heater is often used to accompany the primary source of heat – the boiler. Explain to the consumer that in this type of installation it is best to keep the immersion heater turned off unless absolutely needed. The immersion heater should be used as a backup only and not as the primary way of heating the cylinder.
What is an Immersion Heater and what does it cost? – iHeat
Feb 7, 2022Once the immersion heater has been switched on, the metal element in the water will start to heat up, which in turn will increase the temperature of the water it is in. Depending on the type of immersion heater you use, it could take between one and two hours for water to heat up. This is why using insulating layers can be very beneficial as …
Immersion Heater – on or off or on or off — Digital Spy
10/12/14 – 11:05 #10. It is cheaper to only put it on when needed. The reason for this is that the amount of electricity required to heat the water depends on how quickly the heat leaves the tank. Some will leave whenever you use the water, but some also leaves by getting out through the insulation.
Immersion heater advice needed – AVForums
The better the insulation, the slower the process. An immersion heater will automatically switch to replace that heat when the water cools to a pre-set temperature. You don’t need hot water during the night, but you do need it in the morning. So any power used to keep it hot overnight is wasted.
Immersion Heater – What is it, and how does it work?
Unlike gas boilers, immersion heaters use electricity to heat the water. Electricity is certainly more expensive than gas, oil, and solar. According to the energy saving trust, the standard rate for electricity is 16.36 pence per kWh, whereas it is only 4.17 pence per kWh for gas and 4.81 pence per kWh for oil.This is almost four times the price and the reason why air source heat pumps use …
Immersion heaters- the right way – EUA
Turn it off. An immersion heater is often used to accompany the primary source of heat – the boiler. Explain to the consumer that in this type of installation it is best to keep the immersion heater turned off unless absolutely needed. The immersion heater should be used as a backup only and not as the primary way of heating the cylinder.
Is it cheaper to leave your heating on all the time or turn it on and …
The cheaper to run immersion could be on all night as the thermostat on the hot water tank will stop it producing hot water when the required temperature is met, however we would normally suggest running the ’cheaper’ immersion a couple of hours per night and only running the day time immersion when there is an absolute emergency for hot …
Immersion Heater – Homebrew Talk
It says that it: 1. Water can be heated towards boiling, depending on the bucket’s volume and insulation 2. Heater is thermostatically controlled with over-temperature protection 3. Will heat the water to over 180 degrees F I would think that once the wort gets close to boiling then the immersion heater will turn itself off and the OP would be left in the same situation as he was without the …
Immersion left on for 10 weeks – Page 1 – PistonHeads
Depends on the wattage of the element and if the thermostat was working. If it’s a 3kw element and your electrickery costs 14 pence per kwh then 3×14=42 pence per hour to run the immersion. £10 …
What’s so clever about the new “Smart” immersion heaters?
The larger cap signifies a smart immersion heater. It’s there because of ever-tightening ERP legislation, driving up energy efficiency standards. Most smart immersion heaters are only found in new direct unvented hot water cylinders. That’s because they’re categorised as water heaters as their only heat source is through the immersion heater.
Immersion heater – do they always have a thermostat
There are two in every unit – one is the thermostat, the other a safety cut out. The thermostat on the side of the tank would probably be for the boiler heating the HW as you don’t need one to …
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