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Radiators V Underfloor Heating Upstairs

  • 09-09-2015 8:38pm
    #1
    thebackbar
    Registered Users, Registered Users 2 Posts: 468 ✭✭


    Hello,

    Im building a near passive house, with a air to water heat system for heating. I was going to put underfloor heating upstairs. But I having second thoughts, would it be better to use aluminum rads which would give a more instance heat when its needed ? Im afraid underfloor heating would be too difficult to manage.

    Does anyone regret installing underfloor heating upstairs ?


Comments

  • #2
    BryanF
    Moderators, Home & Garden Moderators Posts: 10,146 Mod ✭✭✭✭BryanF


    What's a near passive house? You need to quantify the heating consumption, by using phpp (passive house software) or get records of its actual energy consumption, or if your stuck at least have your advisor review the BER. This will dictate the cost of the underfloor heating. air to water works best with a low constant heat delivery method like underfloor.


  • #3
    Denisoftus
    Registered Users, Registered Users 2 Posts: 757 ✭✭✭Denisoftus


    +1. We have exactly the same dilemma right know, we had underfloor heating on the ground floor before (gas) and it was very hard to manage, it was either too warm or too cold until you find a balance. I was told with a heat pump (our case now) its a different story and because on the first floor it won't be 30cm of concrete it will be more manageable and will react on changing temperature faster.


  • #4
    ht9zni1gs28crp
    Closed Accounts Posts: 1,011 ✭✭✭ht9zni1gs28crp


    near passive.....whats that then?

    The fact that you are calling in near passive actually backs up the guesswork and your question involving heating. The concept of space v fabric heating is clearly lost here.

    It its as near to passive as you think why are you having heating upstairs at all?


  • #5
    thebackbar
    Registered Users, Registered Users 2 Posts: 468 ✭✭thebackbar


    miller_63 wrote: »
    near passive.....whats that then?

    The fact that you are calling in near passive actually backs up the guesswork and your question involving heating. The concept of space v fabric heating is clearly lost here.

    It its as near to passive as you think why are you having heating upstairs at all?

    That's the dilemma really, the initial phpp that was done on the house calculated the heat demand as working out at 25kwh/m2/yr (6,300kwh/yr just heating).

    I don't like taking the risk of having no heating upstairs.


  • #6
    ht9zni1gs28crp
    Closed Accounts Posts: 1,011 ✭✭✭ht9zni1gs28crp


    thebackbar wrote: »
    I don't like taking the risk of having no heating upstairs.

    That's the difference between certified and 'near'. Putting faith in a system rather than hearsay.

    Edit. Putting practical hat on....why do you think the underfloor heating upstairs will be too hard to manage? If the build spec and detailing is 'near passive' then the control of that underfloor will be way easier as opposed to radiators. Your heating the air which then the MHRVC is in turn extracting it right out and not inputting it back to the same effort that was initially required.

    Have you visited or experienced the 'feel' of a passive build, the traditional 'feel' of warmth is a lot different. This may allay your fears


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  • #7
    galwaytt
    Registered Users, Registered Users 2 Posts: 12,822 ✭✭✭✭galwaytt


    ..if it's a near-passive house, why does it need any heating upstairs ??

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  • #8
    ht9zni1gs28crp
    Closed Accounts Posts: 1,011 ✭✭✭ht9zni1gs28crp


    galwaytt wrote: »
    ..if it's a near-passive house, why does it need any heating upstairs ??

    This is a good question and needs to be answered also.


  • #9
    Curious Geroge
    Registered Users, Registered Users 2 Posts: 1,017 ✭✭✭Curious Geroge


    Denisoftus wrote: »
    its a different story and because on the first floor it won't be 30cm of concrete it will be more manageable and will react on changing temperature faster.

    What depth of concrete will it be ? and was your previous build 30cm screed on the 1st floor?


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