What are Thermostatic Radiator Valves or TRVs?

A Thermostatic Radiator Valve (TRV) may be installed on a radiator instead of the hand wheel valve. The TRV contains a bellows which will close the valve on a rise in air temperature in the room, stopping the flow of heating water to the radiator.

The TRV has a number of settings, which the householder may use to set the desired air temperature for each room. In locations where a high level of heating is required, the TRV will be set at the top setting. Conversely, if only background heating is desired then the valve will be fixed at its lowest setting. If installing a new heating system the incremental cost of TRVs is very small indeed.

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