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Thermostats

  • 02-02-2006 11:13pm
    #1
    Registered Users, Registered Users 2 Posts: 4,142 ✭✭✭


    Has anyone got a recomendation for a good room thermostat. The ones in our house seem to have two settings. Too hot or freezing. No matter that they are set at. I want to change them for something a little more consistent.


Comments

  • Registered Users, Registered Users 2 Posts: 148 ✭✭bro'


    Depends on whether you want analogue or digital but I believe the Danfoss and Honeywell brands are highly recommended. Any decent plumbing merchant will have them.


  • Registered Users, Registered Users 2 Posts: 11,220 ✭✭✭✭Lex Luthor


    http://www.radionics.ie

    Under ALL PRODUCTS click Electrical
    Then Heating/Ventilation/Air Conditioning
    The Heating Controllers
    Then Thermostats

    Plenty choice there.....


  • Registered Users, Registered Users 2 Posts: 192 ✭✭Galway_guy_33


    I ordered two from this website a few weeks back:

    http://www.heatmiser.co.uk/domestic.htm

    I installed them yesterday… I went for the Heatmiser PRT
    The PRT has a 5 day digital thermostat and programmer. Providing up to 4 different temperatures at different times of the day. Cost me 151.27 for two including the shipping cost.

    Kinda expensive i know but they look very modern and have a blue back light when activated and when installed are only 13 deep i.e. about the same dept as a light switch.

    The non programmable model (i.e. fix temperature for every day) should be a good bit less but the still look the same. You can also get a remote control for them too check out the link about.


  • Registered Users, Registered Users 2 Posts: 4,032 ✭✭✭FrankGrimes


    I'm looking to install a wireless thermostat and suitable controller to control my Glowworm 30si gas boiler.

    I want to have a thermostat in one room (would the hallway be best?), set this to say 22degrees, and then have this send signals back to the controller which would then operate the boiler to ensure the temperature in that room will be 22degrees. Is this the way it works and is this the right thing for me to get?


  • Registered Users, Registered Users 2 Posts: 418 ✭✭Doolittle51


    Yea Grimey, that looks like it'd do the job.

    In relation to thermostats - most good thermostats have a connection for a neutral wire. In order to increase the accuracy of the thermostat, make sure this wire is connected. So you need to run 3 wires out to the stat.....


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  • Registered Users, Registered Users 2 Posts: 4,032 ✭✭✭FrankGrimes


    Hi Doolittle - we don't have any wires run in for a thermostat, so the one I picked out there is a wireless one. Any ideas on the accuracy of a wireless thermostat?


  • Registered Users, Registered Users 2 Posts: 192 ✭✭Galway_guy_33


    I had no netural wire for my thermostat so i took one from the lighting circuit is this ok??? Seems to work fine?


  • Registered Users, Registered Users 2 Posts: 418 ✭✭Doolittle51


    Grimey - I'm not sure about the accuracy of the wireless stats, but the one on your link looks quite good - just make sure the battery is replaced regularly.

    Galway Guy - the netral going to the stat should correspond to the live that is going to it, but if you have an old fuse board, it wouldn't matter cause all neutrals are connected together anyway (if you have a new fuse-board with an RCD in it, there's two separate neutral bars one for your sockets and one for your lights etc.)


  • Registered Users, Registered Users 2 Posts: 22,584 ✭✭✭✭Steve


    Does anyone know the reasoning behind putting the thermostat in the hall?
    This seems to be where everyone has them but it's the least likely place that'll give a good reading of the house temperature.
    a. because it's the first rad to be turned off if you're economising as there's no point in heating a space that you just walk through occasionally.
    b. even if the rad is on, doesn't the heat just rise up the stairs and heat the landing?
    c. if either the above were true, the stat wouldn't operate until the house temperature was way over the setting on the stat - therefore setting 20deg on the stat actually means 25 /26deg???

    I'm thinking of moving mine to the living room - what would be wrong with this?


  • Registered Users, Registered Users 2 Posts: 418 ✭✭Doolittle51


    stevec wrote:
    I'm thinking of moving mine to the living room - what would be wrong with this?

    Nothing - Your living room will be at the right temp, and the rest of the house will be at random temperatures. Having one thermostat in a house is not an ideal situation. It just saves money, and it is put in the hall quite often just for the sake of putting it somewhere. If you want proper control over your room temperatures, you'd need a stat in each room which would control the rad in that room. But that would cost €(WAY TOO MUCH)


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  • Registered Users, Registered Users 2 Posts: 22,584 ✭✭✭✭Steve


    Your living room will be at the right temp, and the rest of the house will be at random temperatures.

    True... maybe thermostatic radiatior valves are a better choice

    hmmm... just a thought - as the rooms heat up, you would think that there is less heat taken from the water of that room's rad so in effect colder rooms gain more heat that warmer rooms.
    It follows that the return water temperature increases as each room temperature increases. When the return water then reaches a certain temperature - the boiler's own stat opens and turns off the boiler.

    What I'm getting at is maybe the boiler stat setting has more of an impact on the house temperature that the stat in the hall - maybe this just stops the heating on a warm day???? I remember this last summer when I couldnt work out why there was never any hot water - the room stat was stopping the boiler coming on (even though the rad circuit was off, I still use the boiler to heat the tank)

    All this could, of course, be total chyte - any heating engineers out there???


  • Registered Users, Registered Users 2 Posts: 418 ✭✭Doolittle51


    Well the stat in the hall would hold off the boiler if the house is warm enough. Have you not got an override facility so you can heat you tank?

    We have thermostatic valves on all our rads. The heating just works off a timeclock as required.


  • Registered Users, Registered Users 2 Posts: 4,929 ✭✭✭Raiser


    Thermostatic radiator valves really seems to be the way to go - anyone got an estimate on converting all/most rads in a 3 bed semi to TRV's?


  • Registered Users, Registered Users 2 Posts: 11,220 ✭✭✭✭Lex Luthor


    it really doesn't matter where it goes, you just adjust and compensate accordingly to where it is.

    eg. if your hall is 1 deg colder typically than your living room you just set the setpt of the tsat in the hall a deg lower than what you would have it if it were in your living room....


  • Registered Users, Registered Users 2 Posts: 19,032 ✭✭✭✭adox


    stevec wrote:

    What I'm getting at is maybe the boiler stat setting has more of an impact on the house temperature that the stat in the hall - maybe this just stops the heating on a warm day???? I remember this last summer when I couldnt work out why there was never any hot water - the room stat was stopping the boiler coming on (even though the rad circuit was off, I still use the boiler to heat the tank)

    All this could, of course, be total chyte - any heating engineers out there???


    Just wondering if this is the case?We have a gas boiler/rads and a stat in the hall.We have the rads turned off at the moment and are still using the gas boiler to heat the water.I have to keep turning the temperature up on the stat to get it past the "click" point on the dial or we end up with the boiler not coming on with the timer.

    I just checked the stat earlier and could turn it down again a few degrees before reaching the click.I presume that it is still acting on room temperature even though we are only heating water and wont fire up the boiler if we have it set below that temperature? we have had it cranked up to 25 degrees in the past to get it to run.


  • Registered Users, Registered Users 2 Posts: 419 ✭✭eoghan.geraghty


    Adox what you need is a 2 channel timer.
    Or a combined stat/timer for heating and seperate timer for hot water.
    Not that expensive to sort.


  • Closed Accounts Posts: 1,124 ✭✭✭by8auj6csd3ioq


    Nothing - Your living room will be at the right temp, and the rest of the house will be at random temperatures. Having one thermostat in a house is not an ideal situation. It just saves money, and it is put in the hall quite often just for the sake of putting it somewhere. If you want proper control over your room temperatures, you'd need a stat in each room which would control the rad in that room. But that would cost €(WAY TOO MUCH)
    can you not turn up or down the rad control itself or am i missing something?


  • Registered Users, Registered Users 2 Posts: 680 ✭✭✭copper12


    Adox
    There are lots of ways that central heating systems are controlled
    At the time of installation short cuts are made
    In your case as in others; that use mostly gas boilers for heating and hot water; summer hot water should be controlled from a cylinder stat connected to a motorised valve operating the boiler .
    In your case it’s most likely that the heating thermostat controls the boiler; and the cylinder stat only controls a motorised valve open and closed .


  • Registered Users, Registered Users 2 Posts: 3 Jim_A_P


    copper12 wrote: »
    Adox
    There are lots of ways that central heating systems are controlled
    At the time of installation short cuts are made
    In your case as in others; that use mostly gas boilers for heating and hot water; summer hot water should be controlled from a cylinder stat connected to a motorised valve operating the boiler .
    In your case it’s most likely that the heating thermostat controls the boiler; and the cylinder stat only controls a motorised valve open and closed .

    I know this has been an old thread, however, could anyone be more specific?

    1) Can you please break down the relationship between the boiler and the thermostat? I am facing the same issue. Thermostat won't turn on until the dial goes above 25C. Unfortunately I don't have access to the boiler because I am renting.

    2) How would a two-channel timer affect this relationship? I am referring to eoghan.geraghty's post #17 above.

    3) What kind of technician can examine this issue and tell me what is wrong between the thermostat and the boiler? Any recommendations for finding one in the greater Dublin area?

    Thank you in advance!


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