Elec UFH to run with evohome

Discussion in 'Plumbing and Central Heating' started by Yorkshirebloke, 24 Jan 2019.

  1. Yorkshirebloke

    Yorkshirebloke

    Joined:
    12 May 2018
    Messages:
    175
    Thanks Received:
    4
    Country:
    United Kingdom
    Evening all.
    Basically I'm just looking for a bit of a recommendation for a good elec UFH kit. I'm running an evohome setup for the wet side, but I'm maybe hoping I can also control the elec UFH.
    Can anyone shed any light on good web pages to read or anyone done it that can point me to how it's done?
    Thanks as always guys.

    Alex
     
  2. ericmark

    ericmark

    Joined:
    27 Jan 2008
    Messages:
    18,944
    Thanks Received:
    1,780
    Location:
    Llanfair Caereinion, Nr Welshpool
    Country:
    United Kingdom
    The problem with any underfloor heating is to ensure it does not get too hot, around 29°C is limit, so with wet they limit the water temperature with special manifold, with electric either sensors in the floor or use a special cable which as it gets hot its resistance increases so it is to an extent self regulating. The other problem with electric is in some areas you need to have earthed mats or braid to ensure no one can get a shock, and when I fitted it could not get self regulating type which could be used in a bathroom, that may have changed now.

    First job was dig up the floor, OK in my case had to be dug up anyway to access drains, but installing at least 2" of insulation below the heating mat can work out expensive. Yes if floor already insulated you can fit a rather thin type directly on existing floor, but most floors are not already insulated, so it's a dig up the floors job.

    When I have looked at buying houses I have found it is hard to find evidence that insulation has been laid, it seems the inspectors had same problem and the houses as a result had a very low energy rating, I actually rejected houses as shown as G the lowest rating, and did not know why so low, so would not take the chance. I would assume as with doors and windows where the installer must issue a certificate to shown done correctly, you will need the same with underfloor heating, be it pictures of the installation going in or a certificate you will need to show the guy doing energy rating that is was done correctly.

    To be frank our under floor heating is only used to dry floor of wet room, it does not heat the room all it does is remove chill off the tiles, if using carpet or wood on the floors it would be a waste of money, and although I have bare tiles in wet room I don't have them anywhere else that can be seen, I know hall has beautiful tiles, but prefer to have carpet.

    So selecting does depend on the room, the kitchen in this house has quarry tiles and they were laid so the solid fuel stove could be raked out without damage to floor, however it is rather unforgiving if you drop anything, I prefer a carpet so if I drop a cup there is a chance it will survive. If I wanted a heater not taking up wall space I would use a Myson kick space heater which would warm floor anyway.
     
  3. Sponsored Links
  4. Yorkshirebloke

    Yorkshirebloke

    Joined:
    12 May 2018
    Messages:
    175
    Thanks Received:
    4
    Country:
    United Kingdom
    Hello pal, thanks for taking the time to reply :)

    Ok so perhaps a bit more background to it.......
    This is UFH to go in a bathroom on the 1st floor. So it's chipboard 20mm floor, 8" of floor void which as of the moment is without insulation.
    The bathroom will be tiled floor, and the area that will actually be exposed I.e where we walk and not covered is about 5 m2.
    Originally I was thinking wet, as a few zones downstairs will be wet so I could buy the manifold to control all of it now. However, as a friend rightly suggested, it could be a right pain in the behind to bleed being upstairs, and also I worry that for a fairly small space, it might be easier to go for electric.
    It WILL NOT be source of space heating. That will be taken care of with a wet towel rad. This UFH is purely to male the tiles warm.

    As for photos of the install ericmark, I have a huge collection of photos of the house buddy. This is part of a full house renovation. :)

    Cheers all.
    Alex
     
  5. ericmark

    ericmark

    Joined:
    27 Jan 2008
    Messages:
    18,944
    Thanks Received:
    1,780
    Location:
    Llanfair Caereinion, Nr Welshpool
    Country:
    United Kingdom
    I used a under floor heating pack from tops tiles, it was selected as the only one at the time which had an earth braid around the heating wires so could be fitted in a bathroom, since not ground floor really does not matter if no insulation, I find it takes an hour to warm up, and on using shower it is immediately cooled, I made a mistake using sculptured tiles, idea was more grip, but water does not run off fully as a result, sweeping water into drain with feet after a shower it will take around 2 hours to dry, not ideal as means you get wet feet using the loo. My late mother was an amputee and we wanted a dry floor so she would not slip, this did not work, she swapped chairs in bedroom and so wet wheels rolled between wet room and bedroom, and since she only had one foot she did not really benefit from warm floor.

    Outside the shower area sure it would work well, but use a smooth tile, the thermostat was stupid, you have to have one, but it was not water proof enough to fit inside the wet room, so it senses temperature of the hall not wet room, so all it does is stop the floor getting too hot, in the end the sensor failed, but it's that weak never bothered to do anything as it never gets anywhere near max floor temperature, and old sensor stuck in pocket.
     
  6. DIYnot Local

    DIYnot Local

    Joined:
    3 Sep 2019
    Country:
    United Kingdom

    If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.

    Select the supplier or trade you require, enter your location to begin your search.


    Are you a trade or supplier? You can create your listing free at DIYnot Local

     
  7. Sponsored Links
Loading...

Share This Page