How should I use the controls for an electric water heater?

Cylinder thermostat

Your hot water is stored in a cylinder, and the thermostat prevents it becoming hotter than necessary. Once the water has reached the temperature you have set, the immersion heater will switch off. 

Cylinder thermostats are usually fitted between one quarter and one third of the way up the cylinder. They have temperature scales marked; you should set it at between 60 and 65 degrees.

Time switch

A separate hot water time switch will let you heat the right amount of water at the right time, and take advantage of off-peak tariffs. By signing up to one of these tariffs, and setting the timer to heat water at a cheaper, off-peak rate, you will use less electricity and save money.  

Set your water to heat up only when you need it. The better insulated your tank, the longer your water will stay hot.

Boost switch 

Most systems have a second, smaller heating element at the top of the immersion cylinder, activated by a boost switch. Use this to heat a small amount of water at expensive peak times during the day.

If you need help to use your storage heater please contact Sustainability Manager Louise Hannah on 0208 682 7413.