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UFH Zones and HRV - practical?

  • 11-06-2013 9:46pm
    #1
    rampantbunny
    Registered Users, Registered Users 2 Posts: 907 ✭✭✭


    Hi all.

    I'm at tender stage for a new build. Have Geothermal heat pump, MHRV, and UFH specced in what should be an A2 rated house.

    The advice I'm being given by an installer (for the complete system) is that zones for UFH are a waste, due to the HRV system balancing out the heat over a period.
    To give the installer his due, he did indicate that there is more to it but I've yet to have a full conversation on the subject.

    Any advice?
    Any questions I should ask when I do have that chat?


Comments

  • #2
    fclauson
    Registered Users, Registered Users 2 Posts: 1,691 ✭✭✭fclauson


    I have no zones and it works ok for me


  • #3
    rampantbunny
    Registered Users, Registered Users 2 Posts: 907 ✭✭✭rampantbunny


    fclauson wrote: »
    I have no zones and it works ok for me

    Do you live in a bungalow or two-storey fclauson?

    I'd expect a two storey to have a zone between upper and lower floor, but could be wrong.


  • #4
    Tommyboy08
    Registered Users, Registered Users 2 Posts: 107 ✭✭Tommyboy08


    rampantbunny wrote: »
    Do you live in a bungalow or two-storey fclauson?

    I'd expect a two storey to have a zone between upper and lower floor, but could be wrong.

    No zones anywhere, make sure the ufh loops are of equal length and 100mm apart and let your heat pump do the rest with weather comp, cheapest most comfortable and most efficient,
    I just hope you have a good installer and quality heat pump,
    Which unit have you decided to opt for?


  • #5
    rampantbunny
    Registered Users, Registered Users 2 Posts: 907 ✭✭✭rampantbunny


    Tommyboy08 wrote: »
    No zones anywhere, make sure the ufh loops are of equal length and 100mm apart and let your heat pump do the rest with weather comp, cheapest most comfortable and most efficient,
    I just hope you have a good installer and quality heat pump,
    Which unit have you decided to opt for?

    Thanks Tommyboy.
    Nothing chosen yet but Heliotherm is in the mix. Not sure if vertical bore or horizontal just yet. Ground is a little rocky.


  • #6
    rampantbunny
    Registered Users, Registered Users 2 Posts: 907 ✭✭✭rampantbunny


    Tommyboy08 wrote: »
    No zones anywhere, make sure the ufh loops are of equal length and 100mm apart and let your heat pump do the rest with weather comp, cheapest most comfortable and most efficient,
    I just hope you have a good installer and quality heat pump,
    Which unit have you decided to opt for?

    Dragging this up again, now that I've had time to think on it a little.
    Wondering how it would be cheaper to heat 'more' rather than heat only those zones that I need?
    Or is the cheaper in this the fact that I don't shell out for extra thermostats and the like?

    And although I understand somewhat that HRV will eventually balance a zoned system, I'm wondering how this works. If you consider that in those rooms which I might zone separately for extra heat, if there is only an output from the HRV (not an intake) - how does the heat get taken from this room and get balanced out by HRV?
    Wouldn't there have to be an input to the HRV in this same room for this to happen.


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