The immersion heater alloy coil is called a heating element this will be inside the cylinder. Inside the heating element (which is made from alloy which is used in hard water areas), there is a coil of wire which heats up. The tube in the middle of the immersion and heater element is the thermostat which controls the temperature.

The thermostat keeps an eye on the water temperature and works in collaboration with the heating element. If the water is too cold, it tells the heating element to work. If it’s too hot, the thermostat cools things down. Together, they create a perfect harmony, ensuring you get the water temperature you desire.

Immersion heaters tend to use a thermostat to monitor the temperature. Once the water has reached the set temperature, then it can automatically switch off which helps to reduce costs. This also means that you don’t need to remember to switch it off and you are not paying for hot water when you don’t need it.

Your immersion heater is usually installed with a thermostat, timer, and switch. Switch your immersion heater on 2 hours before you need to use your hot water, and turn it off later. The switch doesn’t have to be in the loft or basement with your hot water tank. It can be wired near your other central heating controls in the main living area.