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  1. taffyinhighlands

    Control logic with 2 rad circuits, ufh, dhw and towel rails circuits

    I have an oil heated circuit that now appears to be misbehaving and the main circulation pump running across the bypass wgen all the logic controllers are off. I think this is a new phenomena but cant be 100% sure. The ufh isnt on a logic controller, and its own booster pump is triggered by the...
  2. D

    UFH boiler call problem

    Hi, I have a strange problem in my recently purchased property. I hope someone can shed some light on it. In a nutshell, when a thermostat causes the underfloor heating pump to run, the boiler does not provide heat unless it happens to be switched on manually or by the boiler timer. It is...
  3. P

    Troubleshoot UFH PLUS radiator system

    Need a heating engineer in Central London I currently have an old worcester boiler. Since its original installation I've had many upgrades to my flat which now has 3 bathrooms and 7 zone underfloor heating plus 3 towel rail radiators. The greenstar I currently have is no longer sufficient...
  4. B

    UFH in 1970s bungalow with insulation beneath concrete

    Hi, I need some advice on what wet UFH system to get for our renovation of a 1970s 3 bed bungalow. The house had subsidence so in the process of fixing that the floors were dug up and replaced with the following construction: hardcore base, membrane, 150mm insulation, concrete finish...
  5. S

    Adding UFH pump to existing “S” plan system

    Hi, folks, great forum bye the way . Ive been doing Diy plumbing since the early 1970’s on rad systems. I have now installed wet ufh in the cir 1800’s part of our present property and am stuck with how to control it. I have an “S” system, older L,N,E wired heat only oil boiler with no pump over...
  6. plumb_know

    UFH help please !!!!!!!!!!!!!!!!!!!!!

    need to replace old john guest hard wired UFH room stat, spoke to manufacturer and there is not direct replacement available. we have put in a standard UFH dial stat but it is not working with the john guest wiring slave & slave programme. I am not very familar with the UFH wiring and nothing...
  7. N

    Help UFH installation

    Hi - some advice would be appreciated. We are doing a refurb and are having water based underfloor heating installed. The top layer will be 15mm engineered wood (floating). Our builder has done things in a backward way so I need advice on what is the best solution given the circumstances...
  8. D

    UFH maximum temperature with LVT

    Hi everyone, we have a 1920s house with solid brick walls. The small front carpeted lounge (1.9 combined tog of underlay/carpet) with its own UFH circuit is struggling to get to 20 degrees. The UFH pipes run under about 5m of LVT to get to the front lounge. My question is, can I boost the...
  9. D

    UFH - Advice sought please

    Greetings PF members, Does ufh operate similar to normal central heating, as in demand, switched, satisfied etc? We’ve been having an issue recently, in one of our propertie, whereby the bedroom was staying hot even though all thermostats were off. Boiler is a Combi, property is a well...
  10. M

    Drayton Wiser Single Zone Wet UFH

    I can't see why this wouldn't work but thought best to ask encase anyone has tried it before or is using it and would care to comment. So the plan is to install wet UFH in a soon to be built kitchen extension. The ufh will be installed in the whole kitchen area which will be of block and beam...
    • milgo123
    • Thread
    • drayton forum plumbing single ufh wet wiser zone
    • Replies: 4
    • Forum: Plumbing Zone
  11. D

    UFH trouble shooting

    Hello my hearing pump failed over the weekend and a new Grundfos Ups3 was installed to replace Geundfos UPS 15-50. Hot water and central heating were reinstated however as soon as the UFH was turned on the downstairs radiators went cold but the UFH became warm. I have turned everything off and...
  12. B

    UFH water temp too high

    Evening all, I’m hoping somebody can help. I have a wet speed fit UFH system, that controls 9 loops on the ground floor, each with a separate zone thermostat, flow valve and actuator. The problem I’m having is when the main programmer (which controls the entire system), is left on (I.e...
  13. E

    UFH not getting hot on vented system

    Hi folks, I’m in need of some sound advice. We have recently had a ground floor extension and have had underfloor heating (company: JK UFH) installed throughout most of the downstairs. We have a few rads still left downstairs and the entire upstairs is still heated through rads. We have a...
  14. E

    How can I get heat into Gravity Fed UFH system

    Hi folks, I’m in need of some sound advice. We have recently had a ground floor extension and have had underfloor heating (company: JK UFH) installed throughout most of the downstairs. We have a few rads still left downstairs and the entire upstairs is still heated through rads. We have a...
  15. M

    UFH not working - suspect issues at manifold

    Hello As per title, the 3 zones of UFH to one manifold are not working. All is good from an electrical perspective, i.e. the room thermostats are calling for heat, the UFH wiring centre is triggering the boiler, but simply no heat is coming from the floor. What makes analysis difficult is 1)...
    • Mjward
    • Thread
    • america issues manifold not working ufh usa working
    • Replies: 38
    • Forum: USA
  16. D

    Filling UFH via boiler filling loop

    Just wondering if there are any issues with adding water to a UFH via the boiler filling loop… reason being wanting to flush out some gunk from a loop and ventilate but don’t have access at the moment to proper hose connection adapter so I can plug mains water at the manifold. Was thinking to...
  17. G

    UFH must valves open before pump runs?

    The (rather sparse) manual with the controller that was supplied with my UFH (Hettaj describes the start sequence as - when demanded by the stat - valves open then pump runs. As the programmability of the stat is very basic, I’d like to replace it with a smart controller the same as I use on...
  18. S

    New UFH wrong side of pump ?

    Hi Guys Im after any advice or if someone can recommend a good heating engineer in Thanet ?. I had a Wundafloor manifold installed for our groundfloor and new extension (currently 4 zones running) and im having problems with the whole system now and the plumber is ghosting my calls. The...
  19. A

    Single Zone UFH Help in bathroom, so many questions

    Done a fair bit of reading and spoke to numerous plumbers/heating engineers and I get so many different answers to my question. By nature I'm a pretty inquisitive bloke and like to know how things work and if its the best way to do things. So my first question is does a single zone UFH setup...
    • AcidOverride
    • Thread
    • bathroom forum help plumbing questions single ufh ufh help zone
    • Replies: 8
    • Forum: Plumbing Zone
  20. J

    URGENT Looking for heating engineer for wet UFH system. Norfolk.

    One circuit of our 30 year old Florad UFH system is not heating up. New pump fitted and send pipes v hot and return pipes good an warm. But floor not warming at all. V puzzling. Advice and / or help needed. NR21 area.
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