Thermostatic Radiator Valve

Thermostatic Radiator Valve… TRV’s,

Whether absent or dysfunctional TRV’s are a common problem. Controlling radiators provides improved comfort and efficiency whilst reducing the heating demand.

Central heating systems were originally designed without TRV’s fitted to the radiators. If the heating was on the radiators got hot, the plan was to heat the whole house from a ‘central heating’ boiler, replacing the need for a fire in each room.

Each radiator had two valves, one on each end of the radiator. These controlled the flow, the speed and therefore volume of hot water being pulled through the radiator and around the system by the pump.

The two valves, although basically identical, each served a different purpose. One end had a knob fitted that would allow the valve to be operated, opened or closed, depending on if the radiator was required. The other simply a cap that did not engage with the valve preventing it from being adjusted without the use of a tool such as a wrench.

The Plan was, heat the whole house, and the tool was used to adjust with a wrench one of the valves of each radiator. The nearer the radiator was to the boiler the more water it was supplied


The ‘Dump’ radiator

Omni-directional valves

Spring and Autumn diurnal fluctuations




How many radiators do you have?

How many have TRV’s valves?

Are they omi-directional?

Do they function?





  • Principles
  • Process
  • Protocols
  • Systems thinking
  • Team building


We’ll be working alongside experienced practitioners, learning how to design and plan, as well as the practical delivery.

We’ll consider the underlying objectives of the installation within the broader context of energy and moisture in the home.

We’ll look at the preparations that are required and how the process affects the quality and speed of the installation.

We’ll drain down and refill the heating system, install thermostatic radiator valves, effective pipe lagging and the addition of an automatic bypass valve.

We’ll discuss how best the system can be operated for optimal efficiency whilst managing and reducing the symptoms of damp.

Lunch will be provided.

The content of this workshop will be covered in one day – unfortunately, there has not been time to schedule an open day with this event.


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