Thermostatic Radiator Valves

TRVs should not be installed on all radiators unless a suitable system bypass is installed between the flow and return and a suitable system interlock, a device that will shut off the heating once the desired temperature has been reached i.e. a room thermostat, is also installed.

What is TRV valve?

TRV is short for Thermostatic radiator valves. TRVs are an easy and inexpensive way to separately control the temperature of individual rooms in your home. The main benefit of thermostatic radiator valves is that they automatically give you room temperature control, and they help you heat your property more efficiently, which saves you money on your heating bill.

What should radiator thermostats be set at?

The ideal setting is actually 2 or 3 (15–20°C). Set it there and leave it and you will be pleasantly surprised that it does its job perfectly.

Should All My Radiators Have Thermostatic Valves?

Radiators should only have one thermostatic valve per radiator and while TRVs can, technically, be installed on all radiators in your home, it’s usually a good idea to leave one radiator without a TRV and permanently switched on.

Ideally, this should either be a bathroom, which would usually benefit from permanent heat, or the room with the thermostat in it. Having a TRV on a radiator in the same room as your thermostat may cause your system to mis-function, as if the radiator cuts out at a lower temperature, it can trick the thermostat into thinking the house is cooler than it really is, which may cause it to overcompensate by heating up even more.