you are in control


Room Thermostat

A temperature sensing device used to maintain the air temperature within a room to a set level whenever the heating circuit is timed to be on.The best location is in a room which is always heated and is the slowest to heat up, lounge or master bedroom when the heating is split into two zones. It should be set to the desired temperature for that room and TRVs in any other rooms should be set to prevent local overheating. Room thermostats should not be fitted in rooms with secondary forms of heating, such as open fire or stove.

Since room thermostats operate by sensing the air temperature, it is important that they are in a clear flow of air that is representative of the room temperature. Do not locate in areas such as corners, behind furniture units or curtains and in areas where the air-flow will pick up extraneous heat such as close to TVs, computers, wall lights and other heat generating devices, or direct sunlight. Also avoid any cooling position such as outside walls and ensure that no draughts are directed on to or into the thermostat from any direction.Room thermostats should be fitted in an area where they can easily be read and adjusted. Thermostatic Radiator Valves (TRVs) should not be installed in the same room as the room thermostat.

Programmable Room Thermostats operate in the same manner as room thermostats and the same positioning rules etc. apply. They have the additional feature of being able to provide different temperatures at different times of the day or night.Some models have a remote temperature sensing availability to overcome any conflict between the ideal temperature sensing and accessibility locations.

 Cylinder Thermostat

A temperature sensing device used to control the temperature of the stored hot water within the cylinder whenever the hot water circuit is timed to be on.They should be fitted between a quarter and a third of the way up the cylinder unless otherwise directed by the manufacturer. It is important to have a good, clean contact with the metal cylinder wall when fitting a strap-on thermostat.The recommended temperature for storage of domestic hot water is between 60oC and 65oC, being high enough to kill off the harmful bacteria in the water, yet low enough to deter the production of scale.Since storage cylinders are quite likely to be located within a hotpress, it is important to make the Cylinder Thermostat as accessible as possible. 

Thermostatic Radiator Valves (TRVs)

Thermostatic valves to control the flow of water through individual radiators.They should be installed together with a room thermostat to provide boiler interlock.

For detailed information on Heating Controls link to: 


About Pat Murphy

True to me; Mother, Wife, Friend, Environmentalist; Living comfortably; Being warm; Knowing what's enough; Chair of WFQA (Irish wood fuel quality assurance scheme)
This entry was posted in living comfortably and tagged , , , , , , , , . Bookmark the permalink.

6 Responses to you are in control

  1. Very good posting Pat. Now if science could only come up with a setting that sensed if a man or woman walked in the room and adjusted the setting accordingly!!!

  2. Great article Pat- especially about room thermostats. I think our Section 23 house should have had all these things fitted, including zoning controls etc… but that was back in the boom days! No sign of them anywhere.
    Are they easy to retro fit?

    • patmcmmc says:

      Thanks for the feedback Sinead
      As always, the legislation was in place, but not always adhered to!
      Retrofitting heating controls depends on how the home was originally plumbed. The optimal solution is two heating zones, and 1 domeatic water circuit, but unfortunately this is not always possible.

      But there are other options, which can help optimize efficiency, and reduce fuel bills.
      We can look at you system if you wish and advise on what is possible.

      • Hi Pat – thanks for that. Will have to put it all off till next year, so will give you a shout then. We have recently upgraded our insulation, and planning too many expenses already this year – a wedding and writing up a PhD in the same year might not have been the best financial planning 🙂

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