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energy efficient homes

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My 4132 sf house is so energy efficent that our radiant floor with DHW heating system with a LP munchkin boiler is double the size required. This has caused it to short cycle and conflicts with the DHW indirect(domestic hot water)causing it to fault out. This has been a problem for two + years since installation and I have had all the top experts out to resolve the problem. These top piping experts and manufacturer reps have had me tear the system apart three times. I think that the energy efficient equipment is not designed for a super energy efficient thermal package(Ecobuilt)like mine and thus it does not operate properly. My Ecobuilt homes use 1/2 to 1/10 th the energy of regular house built to code. Anyone out there who can build or design a heating system with radiant for a 4,000 sf house with a heat gain/ loss that needs 29,000 BTUH?

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  • Dennis MAQ Crook
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    energy efficient homes

    My 4132 sf house is so energy efficent that our radiant floor with DHW heating system with a LP munchkin boiler is double the size required. This has caused it to short cycle and conflicts with the DHW indirect(domestic hot water)causing it to fault out. This has been a problem for two + years since installation and I have had all the top experts out to resolve the problem. These top piping experts and manufacturer reps have had me tear the system apart three times. I think that the energy efficient equipment is not designed for a super energy efficient thermal package(Ecobuilt)like mine and thus it does not operate properly. My Ecobuilt homes use 1/2 to 1/10 th the energy of regular house built to code. Anyone out there who can build or design a heating system with radiant for a 4,000 sf house with a heat gain/ loss that needs 29,000 BTUH?
  • Dennis MAQ Crook
    Options
    energy efficient homes

    My 4132 sf house is so energy efficent that our radiant floor with DHW heating system with a LP munchkin boiler is double the size required. This has caused it to short cycle and conflicts with the DHW indirect(domestic hot water)causing it to fault out. This has been a problem for two + years since installation and I have had all the top experts out to resolve the problem. These top piping experts and manufacturer reps have had me tear the system apart three times. I think that the energy efficient equipment is not designed for a super energy efficient thermal package(Ecobuilt)like mine and thus it does not operate properly. My Ecobuilt homes use 1/2 to 1/10 th the energy of regular house built to code. Anyone out there who can build or design a heating system with radiant for a 4,000 sf house with a heat gain/ loss that needs 29,000 BTUH?

    If you want more information about energy efficient homes I recommend you visit www.energyefficienthomearticles.com. This website is a free portal of information about energy efficient homes.
  • jp_2
    jp_2 Member Posts: 1,935
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    not magic

    for one, I would post this up top, lot more responses.

    you house is magic is it? a heat load is a heat load, no magic.

    not sure why heating would interfere with DHW, 2 totally different loads.

    did they suggest buffering?

    I would consider a on-demand water heater for heating source or a combi core by bradford white? or HTP's idea of the combi core.
  • John Cockerill
    John Cockerill Member Posts: 94
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    too much


    Separate DHW from heating.

    www.Exqheat.com
  • Constantin
    Constantin Member Posts: 3,796
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    Hmm...

    ... all depends on the context. 7BTU/ft^2 is pretty impressive for a cold climate... the home I renovated (132 years-old) now makes it to 12BTU/ft^2 in Boston, which is not the coldest climate. Could I have done better? Sure, but I would have had to chuck the historic windows, make the walls thicker, etc. In other words, build a new house.

    Now, my boiler is oversized also, due to the heating contractor talking me into a bigger unit than was needed (and me not knowing better). If a M or T50 Munchkin was installed in your home, then the boiler in my home is about as oversized as your Munchkin. Yet, I have no complaints, the system runs fine, etc. So, there is more to this than meets the eye, IMO.

    How about posting a system diagram (i.e. near boiler piping, controls, valves, etc.) and some pictures to help us visualize how your system is supposed to work. Along with that data, please also provide what specific units were installed, etc.
  • Gerry May
    Gerry May Member Posts: 22
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    Not enough info... The boiler should modulate based on heat requirement of DHW and infloor. How's this controlled? How's it piped? Is there pump purging after the heat cycle is finished? ( You can purge it into the DHW or vice versa )
  • Weezbo
    Weezbo Member Posts: 6,232
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    sounds intriguing...

    i have a friend who has basement walls three wythes wide of insulated CIF i would like to see the wall detail, foundation to roof crown of your building.

    it might help too if you ran a jpeg of the current piping diagram , here, on another post.

    Maybe a jpeg of the window and door schedules and the ventilation system could come in useful.

    now that i think about it , the secondary heating and cooling would work for me also.

    does the control system incorporate radiant cooling?

    if so , are you also controlling the humidity and does the system have a HEPA unit tied into the ventilation system for indoor air quality?

    well, sounds interesting ...
  • Ditto on the buffer...

    Try this: http://www.ergomax.com/E-Info.htm

    I'd LOVE to hear from anyone that has had any problems with these.
  • Correction...

    Apparently Ergomax has reliability issues.

    try this instead:

    Date: November 05, 2007 07:01 PM
    Author: Jed
    Subject: Why not



    Give Pierre-Yves Cloutier a call? He can show you how the Turbomax works residentially. He told me these tanks have been in use in Canada for 40 years, and are just now needing to be replaced. I have spec'd a few of these tanks commercially, and the results are astounding. I am doing one now. I also am considering adding these tanks to inventory for residental application. I need to talk with Pierre more about that. He can show numbers that make sense. Cal him at 1-819-826-5613.

    Jed



    an excerpt from this thread:

    http://forums.invision.net/Thread.cfm?CFApp=2&&Message_ID=360912&_#Message360912
This discussion has been closed.