Boiler, heating and hot water cylinder controls

The controls fitted to a domestic boiler and a wet central heating system will allow you to control your home (and hot water where appropriate) is heated and the temperature it is heated to. Using the controls correctly will improve the energy efficiency and reduce your running costs without affecting comfort.

The basic controls are:

  • A Timer or Programmer (usually 2 timers where a hot water storage cylinder is used).
  • A Room Thermostat (Stat)
  • Thermostatic Radiator Valves (TRVs).

Central heating systems are fitted with a timer, room thermostat, and thermostatic radiator valves (TRVs) on each radiator.

Each of the controls does exactly what their name suggests:

  • A timer or Programmer sets when the central heating and replenishing the hot water cylinder are ‘ON’,
  • A room thermostat sets how warm the air will be,
  • Thermostatic radiator valves set the temperature of each space heated by a radiator.

Where the system has a hot water storage cylinder (not a combi) a cylinder thermostat will also be installed together with a motorised valve so that the boiler heats the cylinder only when required. Combi controls are easier to set up and very often do not require and wiring in as the programmable room stat connects directly to the boiler via a blue tooth connection.

The new trend in heating controls is to have the option of accessing the system via a smart phone app such as the Nest and EPH advance system options.

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