Immersion heaters heat water using electricity.
This can be either from your mains or renewable electricity you’ve generated from solar panels.
An immersion heater is an electric water heater that sits inside a hot-water cylinder. It’s similar to a kettle, using an electric resistance heater to heat the surrounding water. It’s separate from your central heating boiler or radiators and connected its own power supply via a cable.
You can switch an immersion heater on and off or connect it to a timer.
What are the pros of an immersion heater?
- Immersion heaters are separate from your boiler. This means if the boiler breaks down you can still have hot water
- There will be hot water for several hours if your tank is well-insulated
- Homes with time-of-use tariffs can time their water heating for when electricity rates are cheaper
- Easy to switch on and off so you can stop yourself wasting money
What are the cons of an immersion heater?
- Heating water using electricity costs more then gas
- Leaving your immersion heater on all the time is inefficient