Underfloor heating - wet or electric? How can you tell?

Discussion in 'Plumbers' Talk' started by diymostthings, Oct 31, 2013.

  1. diymostthings

    diymostthings Well-Known Member

    I assume a "wet" system (i.e. off the CH) would have a separate pump which would be heard when the thermostat calls for heat. Electric would be silent?

    I need to investigate a swollen wooden floor in a 3 year old build with UFH.


  2. Sean_ork

    Sean_ork Screwfix Select

    wet would conventionally have a manifold, with flow stat and pump - and it's not uncommon to be able to hear it working with a ear pressed to the floor

    electric might have an adjacent spur to a wall stat, or a dedicated way in the CU - electric UFH wall stats tend to have a floor sensor fitted, as well as sensing air temp, so dropping the stat cover off may reveal

    consider the possibility of the floor being installed without a suitable expansion perimeter before you condemn the UFH
    Last edited: Oct 31, 2013
    kiaora likes this.
  3. big all

    big all Screwfix Select

    look at the meter count the blips per minuit
    turn on the ufh and watch the increase
  4. Wet has a manifold
    wet uf has a manifold, pump, blend valve, they rather noticeable. See if boiler fires up etc

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