Advertisement
If you have a new account but are having problems posting or verifying your account, please email us on hello@boards.ie for help. Thanks :)
Hello all! Please ensure that you are posting a new thread or question in the appropriate forum. The Feedback forum is overwhelmed with questions that are having to be moved elsewhere. If you need help to verify your account contact hello@boards.ie

Underfloor heating slow to reach temp

Comments

  • #2
    blackbox
    Registered Users, Registered Users 2 Posts: 5,056 ✭✭✭blackbox


    It sounds normal to me. Underfloor heating is intended to be always on.



  • #3
    10-10-20
    Registered Users, Registered Users 2 Posts: 8,887 ✭✭✭10-10-20


    https://www.boards.ie/discussion/comment/122828809#Comment_122828809

    Yep, there's no quick boost on underfloor as the whole slab needs to heat up.

    https://www.boards.ie/discussion/2058380332/underfloor-heating-slow-to-reach-temp

    Is the system left running constantly or is it on a timer or manually turned off for portions of the day?



  • #4
    daludo
    Registered Users, Registered Users 2 Posts: 218 ✭✭daludo


    Thanks lads,the system is running all the time,controlled by room stats (temp only),I turn the whole system off from April to September each year.



  • #5
    10-10-20
    Registered Users, Registered Users 2 Posts: 8,887 ✭✭✭10-10-20


    Just to clarify then - so when you say "However it takes hours for the temp to rise in some of the rooms." - from what point does it take hours to rise from? Surely that implies that the stat is controlling each room and the heat is present, or did you turn down a room and then turn it back up again?



  • #6
    daludo
    Registered Users, Registered Users 2 Posts: 218 ✭✭daludo


    I def believe the stats are fine,I have some electrical background. All stats downstairs are set to 20degrees. Last Sunday for example, the living room stat dropped to 19,therefore it called for heat,everything came on as it should, however 5 hours later the stat still read 19degrees, everything on but no increase in temp,surely that can't be right???



  • Advertisement
  • #7
    Lenar3556
    Registered Users, Registered Users 2 Posts: 2,013 ✭✭✭Lenar3556


    https://www.boards.ie/discussion/comment/122832008#Comment_122832008

    Flow might be a little skimpy. You could try turning up the pump / using a constant pressure curve.

    But you should be prepared for much slower response than radiators for example.



  • #8
    daludo
    Registered Users, Registered Users 2 Posts: 218 ✭✭daludo


    Pump is at setting 3,the highest setting. I'm at a loss,is it air in the system???is it a big job to vent it????how long should it take a room temp to climb one degree,surely 5 hrs is too long???at this rate I'll burn through a tank of oil in no length!!!



  • #9
    MackTheMack
    Registered Users, Registered Users 2 Posts: 6 ✭MackTheMack


    https://www.boards.ie/discussion/comment/122832453#Comment_122832453

    Pump could be on its way out. Is it the original pump from 2004?

    Is the sitting room the largest circuit?



  • #10
    daludo
    Registered Users, Registered Users 2 Posts: 218 ✭✭daludo


    No,it's a fairly new pump,installed 18mths ago.sitting room prob largest circuit I'd say alright



  • #11
    MackTheMack
    Registered Users, Registered Users 2 Posts: 6 ✭MackTheMack


    when all other zones are off and only the sitting room is calling, you noticing the same where it is 5 hours to move by a degree?



  • Advertisement
  • #12
    Lenar3556
    Registered Users, Registered Users 2 Posts: 2,013 ✭✭✭Lenar3556


    https://www.boards.ie/discussion/comment/122832453#Comment_122832453

    Unlikely to be air. You won’t be burning through oil, because the heat isn’t going anywhere.

    It’s likely a flow problem, the system may need to be rebalanced, or at least the flow control valve opened a little on this particular circuit.



  • #13
    Wearb
    Moderators, Home & Garden Moderators Posts: 6,514 Mod ✭✭✭✭Wearb


    Are you sure that the stat is calling for heat after dropping 1⁰?



  • #14
    daludo
    Registered Users, Registered Users 2 Posts: 218 ✭✭daludo


    Yes,only the sitting room calling at that time



  • #15
    daludo
    Registered Users, Registered Users 2 Posts: 218 ✭✭daludo


    Prob be doing well to get someone familiar with Rehau system to do that,will try anyway,thanks



  • #16
    daludo
    Registered Users, Registered Users 2 Posts: 218 ✭✭daludo


    Def yes



  • #17
    daludo
    Registered Users, Registered Users 2 Posts: 218 ✭✭daludo


    Lads,got sorted. Popped off d actuators heads and sprayed the pins with Wd40. Then gave them a few tugs with pipe grips to free them up a bit more. I reckon they were just sticking and not opening fully..



  • #18
    10-10-20
    Registered Users, Registered Users 2 Posts: 8,887 ✭✭✭10-10-20


    https://www.boards.ie/discussion/comment/122851499#Comment_122851499

    Yet another wonderful function of WD40. 😀



Advertisement