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ufh

  1. M

    Thermostat on pipe to turn on ufh

    Can I use a pipe stat to switch on UFH Pump when it detects heat in system. The UFH is piped as an extra rad so when pipe gets hot ie house system is on And starts the pump . At present connected to a programmable stat which operates a single port valve and pump. I’ve put the valve in straight...
  2. V

    Need diagram for combining wood burner,hw storage tank, ufh

    Hello everyone, I'm new to this forum, and I need advice, and a good schematic for combining a lot of components, so they will work the best. So here are the main components: 30kw wood burner 1000 litres hot water storage tank 200 litres DHW storage tank with 2 serpentines (one will be used for...
  3. D

    Low loss header connection Inc pump to unvented system

    I am fitting my first low loss header onto an unvented system including ufh and 300ltr tank. I have picked the job up after the ufh has been layer, tested and screened over. All I have to work with is the manifold with flow and return pipes and pre installed rad circuit all of which feed into...
  4. Ryooo

    UFH Quotation pricing and info

    Hi guys, I'm pricing my first UFH job. It's a new extension. UFH zones in kitchen, utility and bathroom. I will be fitting a new boiler which will supply heat to the existing radiators and UFH. Having had no experience in UFH just wondering where the best place to start is. Would a manufacturer...
  5. I

    Adding UFH as supplementary heating

    I have a gas boiler for DHW and single zone heating (S-plan with TRVs on all radiators). Now I'm retired and my circulation isn't as good as it once was, I have problems in the colder months with cold feet - particularly on tiled or engineered wood panel flooring on the ground floor. I have...
  6. M

    Radiators and UFH not functioning well

    Hi All. First post. What a great bunch of people here. I have recently had an extension done and we have UFH on just the new extension, and radiators upstairs etc, in the house we have a nest thermostat and a heatmiser stat for the UFH area. The issue I am having right now is that the nest is...
  7. T

    UFH Pipe - Which manufacturer is best - Rehau, Uponor, JG, Polypipe???

    Hi, I'm installing a large 8 zone UFH system into a new concrete floor we're installing at a bungalow. I'm looking at the pipework manufacturers and i can't decide which to go for: I want to install the best under the screed: I'm currently looking at for Pipes: Uponor Rahau Polypipe John...
  8. I

    UFH Air removal - Beginner's Questions

    Hi all. If I may, I'd like to ask some beginner's questions. The situation: We think we may have air trapped in our UFH system. Therefore, we're considering refilling the circuits. However, there are a few details we need to clear up first. First of all, we need (?) to buy some hose end...
  9. H

    UFH Leaks 1 year after installation

    Hi - I little insight and guidance would be much appreciated. My wet UFH was installed over a year ago by a qualified heating engineer, he went through all stages and did the pressure test as well, everything has been working nicely without any issues. Now here is the unlucky coincidence - I had...
  10. C

    Pressure in heating system keeps creeping up

    We have a 2 year old Valiant EcoTec 832 Combi boiler which was running our CH and hot water. We recently had some UFH installed and the boiler moved to our new extension. Over the past weeks the pressure in the heating system keeps creeping up. It goes from approx 1.5 to 3.2 bar overnight. If...
  11. C

    Wiring UFH and Radiators

    Boiler: Valiant Ecotec 832 UHF (new): 2 zone mixing manifold, Heatmiser Neo Air thermostats x2, Heatmiser UH8 RF (wireless) wiring centre Central Heating (existing): Netatmo radiator valves connected to Netatmo thermostat and boiler relay Other (new): Two Honeywell motorised valves - 1 for CH...
  12. R

    Does air lock affect flow rate in UFH

    Hi all, having issues with my underfloor heating . Flow doesn’t stay hot as return just stays cold even though boiler is operating as it should . My question is does an airlock reduce the flow rates ? I can get good flow 4+ ltr / min through the loops but still the return and hence flow stays...
  13. F

    UFH running temperature and how to gently warm screed

    Hi all, I've just had my wet UFH connected up and turned on for the first time in my new extension and I've got a couple of questions: The screed was laid 6 weeks ago and my floor finish tiles haven't been laid but I'm looking to get them laid in about a week, so would like to spend the next...
  14. V

    UFH heat starvation?

    Hello guys. I am having a number of issues with my Central Heating system. It was commissioned in July 2019 whereby the heating was not turning on (via the room stats) due to the summer weather understandbly. I only noticed these problems in the winter when my heating expectations were not...
  15. I

    ufh actuator advice!!

    Need some advice and help! (I am not a plumber so will try and give as much info as i can) I have a room in my house with 2 loops of ufh in it. They are controlled by the same thermostat. They have separate actuators at the manifold as well. When the heating comes on one actuator opens fully...
  16. R

    Temporary Radiator removal on UFH circuit

    Just about to remove a rad for plaster, but it’s on a UFH manifold. Having not removed one on a UFH manifold before, wanted to check the process with minds more in the know. Is the following about right? • Close off rad circuit actuator/pin with decorating cap, to stop flow. • Remove rad in...
  17. FateFirst

    UFH pump stopped working. Replaced and still not working...possible sensor issue?

    Apologies for any terminology used that doesn't make sense to any plumbers here - not sure on part names etc. so please correct me as I'm always keen to learn and understand ? Moved into a property about 3 years ago and water UFH already installed (JG Speedfit One Room). Been working fine and...
  18. Crooksy88

    UFH screed vs chipboard overlay performance comparison.

    Hi, as part of an extension/refurb project I will be fitting UFH over a new concrete floor as well as existing joisted timber floor. Both floors being within the same room. My question is whether anyone has done this mix of subfloors before and noticed a performance/temperature difference...
  19. A

    Mixing group conflict with Zone valve?

    hi All, can someone help me clarify following issue? is there possibility when room stat calls for heat (UFH system), it opens the zone valve, runs the manifold pump and turns on the boiler but the mixing group does not start mixing the incoming hot water and does not allow the incoming hot...
  20. K

    2 port valve to seperate radiators from ufh zones

    Apologies if something like this already been covered. We have new underfloor heating and new radiators upstairs. Problem is the company who fitted the boiler didn't fit a valve to isolate the upstairs radiators, so I fear when we turn on the underfloor heating it will basically heat upstairs...
  21. gingalig

    Ufh, with microbore rads

    Apologies if its already been covered. I've been asked to quote on a heat only with a solar compatible unvented, the existing system is 10mm microbore gravity fed to rads. I'm confident of the conversion and have my gas safe and G3, I've also been been asked to provide an outlet for, and install...
  22. P

    Cold Towel Rail Fed By Robbens UFH System

    Hi All, Hoping someone can help with what I thought was a minor problem/easy fix issue with the towel rail in my new-ish house; it is now permanently cold. I'll explain a bit of background, the system set up and some things I've tried so far... Hopefully I'm missing something blindly obvious...
  23. M

    URGENT UFH Altech CPS 130-5

    My Altech CPS 130-5 has stopped working and plumber said he can’t find this pump anywhere! Is this product still being made as it was installed about 10 years ago? Can anyone advise where I can buy it or recommend a similar product? Otherwise the whole ‘kit’ needs replacing and I’m trying to...
  24. J

    HELP WANTED UFH RUNNING SUPER HOT.

    We have a wet UFH system in an extension that has installed 10 years and we have had no issues with till now, there are 2 separate UFH systems and manifolds for upstairs and downstairs. We have gas CH with radiators in the rest of the house. Suddenly the UFH in the upstairs part is running...
  25. J

    Help me understand the specifications of an UFH mixing group

    Hello everyone, I have installed in my house an UFH system that consists of: Condensing boiler Hydraulic separator 4.5m3/hr UFH mixing group - TECEfloor – 7745 00 00 Manifold TECEfloor – 7731 00 xx The circuits are laid as follows: Zone 1 3 circuits 80m each 10 cm spacing Zone 2 1 circuit...
  26. P

    UFH works only in one circuit

    Hello, In my house I have UFH on the ground floor. It works in a very strange way. I am sure that it never heats up well because I have never had warm floor(I set 21 degree, that's low but I should feel it at least), but I also see some issues. All 6 circuits are for the same room and I do...
  27. PDS

    Air source heat pump and UFH

    Hi Guys, I’ve been asked to fit an air source heat pump with unvented hot water tank, and UFH on downstairs concrete slab and spreader plates upstairs. Has anyone fitted this before and taken pictures so I can see a neat or workable layout please? Look forward to hearing from you.
  28. R

    Ufh in timber ground floor

    Hi all I'm building a single story rear extension and would like to use UFH It's going to be a timber joist for with 22mm chipboard flooring running from a combination boiler What is the most effective way of installing the UFH? 1) spreader plates. 2) celotex between joist with a biscuit mix...
  29. 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.
  30. J

    UFH Pressure Test Length / Pressure Dropping

    Hi All, My wife and I our renovating our first house together and have become a little stuck installing our wet underfloor heating system. Before we end up phoning around local plumbers I thought I'd post on here to see if anyone has any bright ideas. We've laid the pipes (2 zones)...
  31. 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...
  32. B

    Low profile overlay wet UFH - screed, grooved gypsum or insulation?

    Hi folks, my first posting and hopefully it's a sensible question. I'm doing a renovation and intend to heat with wet UFH supplied from an ASHP. I have to go for minimal build up because of head-room, so I'm looking at the various low profile systems. Insulation of the property will be OK...
  33. M

    UFH Pump - Always on?

    Hi all, I've had a Polypipe UFH solution fitted and I've got a query about the water-pump. I've asked the plumber but he's passed me onto the spark - who fitted it this way. Kinda think between them I've not got a definitive answer...so here I am asking the plumbing gurus..... In a nutshell -...
  34. B

    UFH Water quality and possible valve leaks

    Trying to solve a little mystery to do with minor leaks from manifold valves. Attached image shows the valve (new) and the arrow shows the point of leakage. It seems the internal seal of the moving pin has deteriorated over time. May I add that the valve is not stuck, its moving freely. Its a...
  35. 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...
  36. A

    UFH thermostat issue

    Hi - got an aqualec UFH system with aqualec thermostats in each room displaying the temp, with a ESI programmer in the utility room in my flat. The plumbers have just recently changed the install so that when the heating programmer is off, the thermostats go off and don't display the...
  37. 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...
  38. L

    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...
  39. T

    Whistling UFH mixer valve & cycling boiler - no ABV?

    Hi all, New to this forum but hoping you could give me a hand with some issues I'm having with my UFH. I bought a house in Nov last year that has wet UFH in a kitchen extension. It's a relatively small area with only 2 loops, total 90m piping and 2-port manifold. Manifold model is Wunda...
  40. 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...
  41. H

    UFH issues - Anyone recognise this symbol?

    Hi all, Just looking for some help. Moved into a house last year that already had UFH installed, but I have no information about the system and one of the air flow caps has spring a leak. Managed to cap it for now but trying to find a replacement part. The manifold has nothing written on it...
  42. P

    zoned system, pressure drops when cold (but goes back to normal when i manually open valve)

    Hi all! Sorry if this has been asked before but i haven't been able to find anything out there... We made our CH system zoned when I laid some UFH in the kitchen. (2 zones total: kitchen + rest of house) each zone has a Honeywell 2-port zone valve. The boiler is a Glow Worm combi. All is well...
  43. P

    Ufh problems temp control and radiators temp

    Hi guys Our recently installed UFH system is causing us trouble and we are struggling to get the fitter to help, problem one is we have to slowly build up the heat as the new floor is tiled but the only way to do this is by turning the boiler heating controls down as low as it goes, 30 degrees...
  44. S

    UFH and skirt heat issue - Wits end

    Hi All, I have failed in my journey and I now need some advice. I have been trawling this site and the Internet for over 1.5 years to find the answer to my problem. I have reached out to three plumbers and the fitting company of the system but unable to get anyone through the door. I am a...
  45. 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...
  46. P

    High gas bill - Vaillant 637 - UFH and Alu Rads - Help

    Hi, Following a full refurbishment of an house and a new build rear extension we had a brand new heating system installed. Give you an idea of what it is: Vaillant 637 system boiler 300l Water tank Wet UFH (floor area 15x4m) in new rear extension (family area, kitchen and dining) - used all...
  47. P

    Unused UFH port...........

    Afternoon Lads and Lasses. I am setting up a 2 circuit UFH system the manifold has 3 ports. Do I blank off the spare ports or do I fit a loop and leave it turned off ? The other ports will be controlled with room stats.
  48. P

    Combined UFH and radiator system

    Hi guys, probably a silly question but in my new extension I have water UFH connected to my combi which runs the radiators in the rest of the house. Although both are controlled separately do they use the same water? What I mean by this is if I put inhibitors in a radiator will it also enter the...
  49. 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...
  50. Ryooo

    Retrofit wet UFH advice required

    Hi, first post here so excuse me if i break any etiquette on this forum. I have been a plumber for over 15 years. I've just bought my first house, its a 2 bed semi detached ex council house. I've completed major renovations in the upstairs of the propery and now about to start downstairs. I'm...
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