Advertisement
Help Keep Boards Alive. Support us by going ad free today. See here: https://subscriptions.boards.ie/.
https://www.boards.ie/group/1878-subscribers-forum

Private Group for paid up members of Boards.ie. Join the club.
Hi all, please see this major site announcement: https://www.boards.ie/discussion/2058427594/boards-ie-2026

Can you retrofit a Heat Recovery Ventilation (HRV) system

2»

Comments

  • #32
    Shefwedfan
    Closed Accounts Posts: 15,752 ✭✭✭✭Shefwedfan


    GaryCocs wrote: »
    How much were they looking for.

    Anyone any recommendations for a blower test?

    Thinking a uv/escaping heat one would be good too.

    3-4K UKIP plus vat depending on model, 3000 sq ft house


  • #33
    randombar
    Registered Users, Registered Users 2 Posts: 3,510 ✭✭✭randombar


    Shefwedfan wrote: »
    3-4K UKIP plus vat depending on model, 3000 sq ft house

    Ouch!!


  • #34
    Shefwedfan
    Closed Accounts Posts: 15,752 ✭✭✭✭Shefwedfan


    GaryCocs wrote: »
    Ouch!!

    6k for install budget price so far....how much do these save?


  • #35
    randombar
    Registered Users, Registered Users 2 Posts: 3,510 ✭✭✭randombar


    4,500 first one back, no air tightness test or improvements done as part of that though


  • #36
    Blowheads
    Registered Users, Registered Users 2 Posts: 437 ✭✭Blowheads


    Shefwedfan wrote: »
    6k for install budget price so far....how much do these save?

    You'd know the good times are back


  • Advertisement
  • #37
    Shefwedfan
    Closed Accounts Posts: 15,752 ✭✭✭✭Shefwedfan


    Im struggling with this. It is something I think is perfect for the house but the prices I am getting are crazy.

    What sort of savings would you expect? would it be even a 30% reduction in heating fuel or more? I know it depends on the air tightness but just a high level number.,

    At the moment based on the budget numbers I am getting it is just a terrible business case to bring to the board :-) e.g. wife


  • #38
    Blowheads
    Registered Users, Registered Users 2 Posts: 437 ✭✭Blowheads


    Shefwedfan wrote: »
    Im struggling with this. It is something I think is perfect for the house but the prices I am getting are crazy.

    What sort of savings would you expect? would it be even a 30% reduction in heating fuel or more? I know it depends on the air tightness but just a high level number.,

    At the moment based on the budget numbers I am getting it is just a terrible business case to bring to the board :-) e.g. wife

    This ain't a heating solution. This is used to bring in fresh clean air that's pre warmed by the exchanger. It's almost mandatory in an air tight house since there is no outside fresh air getting in to replace the stale, used and moist air inside.

    I don't think you can think of this as a saving, though I'm sure someone from some company will sell you on that... We put it in to reduce condensation etc and have opening windows and vents in cold temperatures. It does that very well. Pm if you want more info


  • #39
    Darando
    Registered Users, Registered Users 2 Posts: 747 ✭✭✭Darando


    Do any of the MHRV ducts come in small rectangular sections rather than the larger round ducts - I have a few stud walls going from bottom to top of house which could work as a route to the kitchen meaning space is tight. Don't have option really for other routes apart from boxing sections (which look poor unless in wardrobe/cupboards I think)


  • #40
    0lddog
    Registered Users, Registered Users 2 Posts: 3,235 ✭✭✭0lddog


    Shefwedfan wrote: »
    Im struggling with this. It is something I think is perfect for the house but the prices I am getting are crazy. ........
    At the moment based on the budget numbers I am getting it is just a terrible business case to bring to the board :-) e.g. wife


    Think of it as something that could make it nicer to live in the house - a bit like having the house decorated for the first time in decades ....;)


  • #41
    Shefwedfan
    Closed Accounts Posts: 15,752 ✭✭✭✭Shefwedfan


    Blowheads wrote: »
    This ain't a heating solution. This is used to bring in fresh clean air that's pre warmed by the exchanger. It's almost mandatory in an air tight house since there is no outside fresh air getting in to replace the stale, used and moist air inside.

    I don't think you can think of this as a saving, though I'm sure someone from some company will sell you on that... We put it in to reduce condensation etc and have opening windows and vents in cold temperatures. It does that very well. Pm if you want more info


    So my current setup is....heating goes on in morning....house nice and toasty....miss Shefwed gets up and opens all the windows in house.


    House is like ice box. Heating goes on an heats house back up. Today I arrive home to stove going full blast while all windows are open.



    What I mean by heat gaining is that because this is warming the air while pumping back in it "should" reduce the heating requirements because I am not opening the windows to ventilate the house


  • Advertisement
  • #42
    0lddog
    Registered Users, Registered Users 2 Posts: 3,235 ✭✭✭0lddog


    Even if it could reduce your heating requirement, do you think that you will be able to reprogram The Controller ?

    To do what you want you may need to swap your Controller for a different model

    Would it be worth it ?

    :D


  • #43
    josip
    Registered Users, Registered Users 2, Paid Member Posts: 15,602 ✭✭✭✭josip


    Retrofitted a 3 bed semi in 2010 for €4,000 installed (a basic ProAir unit).
    Never had a problem with it.
    Connecting the hob extractor to it is a no-no I thought ? You don't want any build up of grease in the ducts where it will be impossible to clean.
    We were gutting the house at the time so there was little overhead installing.
    House became a B something after it all. Not airtight but I siliconed everything that looked like a hole so it holds heat well.


  • #44
    Blowheads
    Registered Users, Registered Users 2 Posts: 437 ✭✭Blowheads


    Shefwedfan wrote: »
    So my current setup is....heating goes on in morning....house nice and toasty....miss Shefwed gets up and opens all the windows in house.


    House is like ice box. Heating goes on an heats house back up. Today I arrive home to stove going full blast while all windows are open.



    What I mean by heat gaining is that because this is warming the air while pumping back in it "should" reduce the heating requirements because I am not opening the windows to ventilate the house

    Controller needs regular reprogramming alright but it will definitely cut your bills if she's opening all the windows all the time..


  • #45
    listermint
    Registered Users, Registered Users 2, Paid Member Posts: 34,893 ✭✭✭✭listermint


    Shefwedfan wrote: »
    So my current setup is....heating goes on in morning....house nice and toasty....miss Shefwed gets up and opens all the windows in house.


    House is like ice box. Heating goes on an heats house back up. Today I arrive home to stove going full blast while all windows are open.



    What I mean by heat gaining is that because this is warming the air while pumping back in it "should" reduce the heating requirements because I am not opening the windows to ventilate the house

    Have you blocked up all the vents? because these sounds like an incredibly poorly thought out means of heating and ventliation in the house.


  • #46
    Shefwedfan
    Closed Accounts Posts: 15,752 ✭✭✭✭Shefwedfan


    listermint wrote: »
    Have you blocked up all the vents? because these sounds like an incredibly poorly thought out means of heating and ventliation in the house.


    The house has no vents!! I done a retrofit a few years back.....so one bit at a time.....


  • #47
    josip
    Registered Users, Registered Users 2, Paid Member Posts: 15,602 ✭✭✭✭josip


    Blowheads wrote: »
    Controller needs regular reprogramming alright but it will definitely cut your bills if she's opening all the windows all the time..


    Only if she stops opening the windows.

    There's no guarantee they'll listen to the logic and will still decide the house could do with 'ventilating'.

    Speaking from experience.


  • #48
    randombar
    Registered Users, Registered Users 2 Posts: 3,510 ✭✭✭randombar


    Anyone else get quotes back?


  • #49
    Shefwedfan
    Closed Accounts Posts: 15,752 ✭✭✭✭Shefwedfan


    0lddog wrote: »
    Think of it as something that could make it nicer to live in the house - a bit like having the house decorated for the first time in decades ....;)

    I will do it, just not now....I went solar pv instead as better business case

    I want to do a bit more on insulation before heat recovery


  • #50
    s7ryf3925pivug
    Closed Accounts Posts: 3,999 ✭✭✭s7ryf3925pivug


    Would positive input ventilation be preferable to HRV for older buildings that are likely to have significant air leakage?

    Are there PIV systems with good HEPA filters? (PM2.5 levels go up to over 50 pretty much immediately when a window is open thanks to solid fuel burning in the area during the winter.)


  • #51
    Shefwedfan
    Closed Accounts Posts: 15,752 ✭✭✭✭Shefwedfan


    Tatiana Rough Shot-putter wrote: »
    Would positive input ventilation be preferable to HRV for older buildings that are likely to have significant air leakage?

    Are there PIV systems with good HEPA filters? (PM2.5 levels go up to over 50 pretty much immediately when a window is open thanks to solid fuel burning in the area during the winter.)


    Interesting as I seen these and just thought they where mini HRV


    Could be interesting solution to stop condensation in my house


    https://smartheat.ie/drimaster/


  • Advertisement
  • #52
    s7ryf3925pivug
    Closed Accounts Posts: 3,999 ✭✭✭s7ryf3925pivug


    Shefwedfan wrote: »
    Interesting as I seen these and just thought they where mini HRV


    Could be interesting solution to stop condensation in my house


    https://smartheat.ie/drimaster/
    Yeah I found an old one in my attic, which is what prompted me to look up the topic.

    It is missing a plug and a tube. The vent for it in the hall was taped up. Will put a plug on it and see if it works. It's generally well-reviewed. My main concern would be it just sucking smoke into the house as the filters look basic enough.


  • #53
    MicktheMan
    Registered Users, Registered Users 2 Posts: 2,986 ✭✭✭MicktheMan


    Tatiana Rough Shot-putter wrote: »
    Would positive input ventilation be preferable to HRV for older buildings that are likely to have significant air leakage?

    I would not use or recommend the use of PIV for the simple fact that you will be introducing the real risk of interstitial condensation in your building structure (i.e. forcing moisture laden warm air out through a cold structure). MEV is far superior in this regard (i.e. no risk).


  • #54
    randombar
    Registered Users, Registered Users 2 Posts: 3,510 ✭✭✭randombar


    Got a quote back and it's a confusing one because I dont know the systems, it has three options for machine and ducting and I've no idea which one to go for:

    Domus HRX2-D
    vs
    Vent Axia Sentinel Kinetic Plus B
    vs
    DucoBox Energy 400


    https://www.dropbox.com/s/l71mmwgg91x4xgw/Screenshot%202020-01-21%2010.32.44.png?dl=0

    vs

    https://www.dropbox.com/s/doxdskaw86cq50y/Screenshot%202020-01-21%2010.33.02.png?dl=0


  • #55
    Shefwedfan
    Closed Accounts Posts: 15,752 ✭✭✭✭Shefwedfan


    0lddog wrote: »
    Think of it as something that could make it nicer to live in the house - a bit like having the house decorated for the first time in decades ....;)

    I was struggling too much, went solar PV instead


  • #56
    listermint
    Registered Users, Registered Users 2, Paid Member Posts: 34,893 ✭✭✭✭listermint


    GaryCocs wrote: »
    Got a quote back and it's a confusing one because I dont know the systems, it has three options for machine and ducting and I've no idea which one to go for:

    Domus HRX2-D
    vs
    Vent Axia Sentinel Kinetic Plus B
    vs
    DucoBox Energy 400


    https://www.dropbox.com/s/l71mmwgg91x4xgw/Screenshot%202020-01-21%2010.32.44.png?dl=0

    vs

    https://www.dropbox.com/s/doxdskaw86cq50y/Screenshot%202020-01-21%2010.33.02.png?dl=0

    Did you make your mind up. Presently considering this as next phase of making the house pleasant to live in. Have ewi new windows doors . Attic insulation half done.


  • #57
    randombar
    Registered Users, Registered Users 2 Posts: 3,510 ✭✭✭randombar


    listermint wrote: »
    Did you make your mind up. Presently considering this as next phase of making the house pleasant to live in. Have ewi new windows doors . Attic insulation half done.

    Have paid a deposit to get the drawings and going to do it myself. Talked to a few more that have done it. Bit of a dose to install but saved a few K. All have said it’s made a great improvement to their homes.


  • #58
    CodeJACK
    Registered Users, Registered Users 2 Posts: 82 ✭✭CodeJACK


    GaryCocs wrote: »
    Have paid a deposit to get the drawings and going to do it myself. Talked to a few more that have done it. Bit of a dose to install but saved a few K. All have said it’s made a great improvement to their homes.




    Who did you use to design and commission the MVHR? Thanks


Advertisement
Advertisement