Conserve Hot Water Cylinder Thermostats

Heating your water can work out to be very expensive so fitting a cylinder thermostat to your hot water cylinder is another quick and easy way to save money on your heating bills.

A cylinder thermostat prevents your water being heated any hotter than you need it to be and works by electronically turning off your boiler or immersion heater once the desired temperature has been reached.Cylinder thermostats are normally set between 60c and 65c as this is a high enough temperature to kill off harmful bacteria in the water.

Hot water cyclinder thermostat illustration
10 Maximum lifetime of measure (yrs)

A cylinder thermostat will have to be installed by a qualified electrician, it is not a DIY job but it is usually quick and does not cause disruption to your home.

How much could you save each year?

Old boiler rating Semi detached house Detached house Detached bungalow Mid terrace house Mid floor flat
G ( < 70%) £305 £490 £275 £250 £130
F (70–74%) £230  £365 £205 £185 £95
E (74–78%) £190 £310 £170 £155 £75
D (78–82%) £160 £255 £140 £130 £60
  • Hot Water Cylinder Thermostats Advantages

  • Once you water has reached a temperature of 60/65oc your thermostat will switch off your boiler or immersion thus saving you money and not wasting your fuel.
  • Your water temperature will always reach the temperature you have set the thermostat to so it will never get any hotter.
  • Hot Water Cylinder Thermostats Disadvantages

  • A cylinder thermostat will have to be installed by a qualified electrician, it is not a DIY job

Available with

You can get grants for Hot Water Cylinder Thermostats, below are the schemes this is available with.

* According to data sourced from the Energy Saving Trust website.