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underfloor heating

  1. F

    Can my boiler handle underfloor heating?

    Hi all, Needing some advice on underfloor heating please. I have an approximately 4 year old Vaillant ecoTec Plus 838 combi boiler which is currently serving 11 radiators around the house which includes 2 towel rails. I've heard that if you want underfloor heating you need to ensure the boiler...
  2. R

    Underfloor heating/boiler sizing

    Im refurbing my house and looking into underfloor heating downstairs. What size boiler would be needed for 30m2 underfloor heating 1 bathroom 7 radiators (5 if ufh installed)
  3. N

    Polypipe Underfloor Heating with 3x 2-Port Zone Valves???

    I am currently trying to find out which is the best way to wire up my underfloor heating. I have attached a PDF of what my system is currently like. I've been advised to install 3x 2-port zone valves so that when the UFH calls for heat it can do so independently of the radiators, which is...
    • Nis
    • Thread
    • heating underfloor underfloor heating valves
    • Replies: 4
    • Forum: UK Plumbers Forums
  4. D

    Wet Underfloor Heating not working

    Hi , I have a polypipe underfloor wet system , manifold and with a Salus wireless thermostat. Was working fine last winter for the first time - brought up the temperature slowly over several days using the manifold temperature valve as instructed and left it on 45 degree setting and then...
  5. moonlight

    New Vaillant boiler fitted, problems with underfloor heating.

    I fitted a vaillant eco tecplus 630 in July. Underfloor heating now required. It will only come on when the towel rails are calling for heat and zone valve open. I know this is a wiring problem. I didn't wire the boiler a colleague did. Live, neutral earth ok. But I can see only one of the wires...
  6. S

    Underfloor heating pump and manifold choice

    Having a load of work done at the moment, part of which is to have wet UFH installed, just looking for any thoughts around the best system to use. There seems to be lots of choice, looking for 3/4 zone system. Any thoughts greatly appreciated.
  7. M

    Location of secondary return pump and return pipe for underfloor heating.

    I am fitting a secondary return on a system, tank will be in the loft. All the pipework goes up to the loft at the back of a cupboard, I would like the pump to go on the return pipe in here so it is easily accessable for maintenance. My collegue says he thinks it should go to as near to the tank...
  8. N

    Underfloor heating question - Heatmiser

    Hi all I have underfloor heating downstairs and radiators, plus two towel radiators upstairs. I have a Heatmiser UH8 and the radiators are connected to the the 5th zone and the towel radiators are connected to the 8th . Now, if I remember rightly from manuals, if you want to hook up a towel...
  9. A

    New Member: Underfloor Heating

    Hi, Thanks for having me. I own a B&B in the far NW of Scotland in the village of Durness on the NC500 route. I have an Encompass underfloor heating system connected to a Grant oil burner and associated with a Santon Premier Plus unvented hot water system. I keep losing pressure in the hot...
  10. M

    Underfloor heating zone getting warm with system turned off?

    Hi Guys hope you can help, I have a wet underfloor heating system and have 6 zones, the problem I'm having is one of the zones is getting warm even though the master thermostat/controller is turned off, the pump is not being switched on so is not circulating through the system. I have an 'Ideal...
  11. D

    run pipes for underfloor heating?

    Hi I have an installation for CH half way installed (first fixed) I want to tile all the floors.. and have realised it will be too cold so I thought about laying pipes in the floors instead of having radiators and simply using the flows and returns that are already there for the radiators to...
    • Deleted member 102951
    • Thread
    • heating pipes underfloor underfloor heating
    • Replies: 19
    • Forum: UK Plumbers Forums
  12. M

    Polypipe underfloor heating

    Hi I have a polypipe multizone underfloor heating system (Gas) that stopped working a few weeks ago. It had been making some screeching noises and my hunch in that the Grundfos pump has died as the screeching has stopped - along with the heating! I may be wrong of course. The LED's on the side...
  13. C

    Wet underfloor heating

    Hey guys Ive carried out some rough calculations as to how much of my concrete floor I'll have to break out to fit a UFH system and I'm concerned about the amount of work involved and the number of skips I'll need and was wondering if I can reduce the amount of digging I need to do. I was...
  14. R

    Underfloor heating + Viessmann 222F

    hi all, Just purchased a property and looking at boilers etc. We’re going to have all of downstairs with underfloor heating (approx: 100 sq meters.) running backup rad pipes also downstairs (just in case!) 4 beds, will have an en-suite bedroom in the loft and also mid level bathroom. Rads in...
  15. M

    Underfloor heating, I've done the donkey work testing, can you diagnose

    ok, so I have a underfloor heating manifold with 11 ports (see pic) Rooms struggle to warm up. Think I know why, here's what I've tested: 1. Pressure expansion tank in garage 2 bar - ok 2. Boiler working, water hot - ok 3. Thermostats calling for heat and actuators respond - ok 4. Flow: all...
  16. D

    Underfloor heating - supply & return flow temperature question

    Hi I have a wet based underfloor heating system and I've noticed that the stone floor in our kitchen isn't warming up evenly. There is one patch that is much warmer than other areas. I have noticed that when I look at the manifold the supply temperature is running at around 50 to 55 degs but...
    • dl1973
    • Thread
    • flow heating return supply underfloor underfloor heating
    • Replies: 3
    • Forum: UK Plumbers Forums
  17. R

    Help... underfloor heating

    Hi, can any one give any advice on UFH please? We have a system that goes through one pump, picture attached, and there is no way of switching the UFH off whilst the downstairs heating is on, despite it being on a separate thermostat. When I turn the thermostat for the UFH something in the...
  18. M

    Draining down unvented system including underfloor heating

    Hello folks I haven't had any experience working on radiators when it comes to replacing them on Unvented/sealed systems which include underfloor heating. My question is more geared towards when draininh down, would I need to open the 3 port valve or two port valves to drain down a system...
  19. king of pipes

    Pressure testing alpert pipe underfloor heating loops

    Evening gents what pressure do you test and leave the system pressurised to for laying of the screed? . Kop
  20. C

    Wundafloor underfloor heating

    Has anyone got any experience with their EPS 400 board system please? I’ve just laid a zone and when I got back to the manifold I cut the pipe to the right length. When I did, there was a heck of a lot of pressure built up in the 16mm pipe. Now the pressure is out of the pipe it seems the that...

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