When the two are put together the supply of heat into the radiator is automatically controlled with respect to the temperature of the room. When the room reaches the desired temperature, the valve closes and the radiator stops heating.
The room then cools, the valve opens and the radiator begins to heat again. Turning the handle of the thermostatic head adjusts the distance that the actuator must expand by to close the valve. Many TRVs have a 1 to 5 scale - with 1 representing the smallest distance and 5 the greatest. The larger the distance, the warmer the room must be before the valve is closed.
Thermostatic valves are designed to let a small amount of water pass through when the room is cold to protect against frost. Not all TRVs have a 1 to 5 scale. Our Windsor TRVs - our single most popular valve - works exactly the same as traditional-looking thermostatic valves but with a more discrete scale. Rings on the neck denote the 1 - 5 settings.
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Make the most of your TRV settings to control individual room temperatures and save money by avoiding overheating commonly caused by manual valves. Flexibility is the driver behind installing thermostatic radiator valves in your home. Avoid energy wastage and prevent frost damage, mould and other climate-based issues that can plague home maintenance.
Then in less populated rooms like spare bedrooms or exterior communal areas, you can set the TRV even lower and avoid heating rooms not used as often by your family. Thermostatic radiator valves show their economic potential by enabling you to save money and fuel while enjoying a comfortably heated home.
However, it is possible to encounter issues. Draughts or ventilation mess with the valve, causing much hotter or colder readings than reality. And these simple devices can influence big knock-on issues depending not only on if they break but when they break.
If a thermostatic radiator valve stops working when turned off, the radiator will not switch on and can cause condensation, mould, frost damage and other cold-based issues. And if your TRV breaks when on, it will pump endless hot water through your radiator and cause serious overheating. For this reason, perform frequent TRV checks to ensure accurate ambient heat detection, and do not leave them on high settings when out of the house for a significant period of time. Instead of preventing the condensation that often hinders bathrooms, the TRV will shut off and do nothing.
Another consideration is to not fit thermostatic radiator valves in the same room as your principal thermostat. This unit connects directly to your boiler and so you will inadvertently create a competition between your TRV and central thermostat.
In this monumental battle, the only loser is the homeowner! Thermostatic radiator valves have come a long way since the basic wax valves.
Now, we recommend TRVs to most of our customers due to their advanced technology, reliability and foolproof set-up. Behold, the electronic thermostatic radiator valve….
Leading home heating brands like Honeywell have taken the TRV further than ever. A battery-powered thermostat with more advanced heat detection ensures the TRV performs with greater accuracy than any traditional thermostatic radiator valve. Electronic TRVs can also be connected to increasingly popular intelligent heating systems. The numbers on a thermostatic radiator valve refer to the temperature in the room , not the radiator.
This is a common misconception, so don't worry if you weren't aware of this before. The very point of a thermostatic radiator valve is that it can detect the temperature in the room and will let more or less hot water into the radiator accordingly.
If the room is cold, the the TRV will allow more hot water into the room to heat it up. As the room gets warmer, the TRV will restrict the amount of hot water coming into the radiator to maintain the temperature. If the room temperature starts to drop, the TRV will allow more hot water in The numbers on the valve roughly correlate to the room temperatures below.
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