Immersion heaters are very easy to use – they are connected to a power supply with a cable and can be turned on or off at the flick of a switch as there is no need for the contained water to be constantly heated.
Essentially, immersion heaters work in a similar manner to a kettle, incorporating an electric resistance heater like a coil or metal loop, to heat the water within when required.
For a deeper insight, take a look at our blog, The Ins And Outs Of Immersion Heaters.