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Green Building Bible, Fourth Edition
Green Building Bible, fourth edition (both books)
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General: Dual heat source central heating

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  1.  
    • CommentAuthorThinfourth
    • CommentTimeOct 28th 2007
     
    Considering a new build house and thinking a few things over. firstly central heating

    We are going to have underfloorheating and a big feck off wood burning stove. For sake of connivence we want to have a easily controlled option also for heating instead of having to build a fire every time.

    So questions are

    1 how to have two heat sources in one central heating system is this easy enough

    2 How to even out the output of the log burner as it will be left damped down during the day and then when we get home it will be stoked right up and this will then produce way more heat then is needed so is there a way to even out this heat output and store it.

    3 If the system temp gets too high is it easy enough to dump the excess heat to maybe a radiator range sat in the wood store
    • CommentAuthortony
    • CommentTimeOct 28th 2007
     
    Why ever do you want to pay for feed maintain and run a heating system?? Let alone two!!

    It is perfectly possible and desirable to design out the need for a formal heating system (where will it be built?)

    Spend on insulation, passive solar design and air sealing and use thermal mass and solar gain and you wont have to pay heating bills ever again.
    •  
      CommentAuthorfostertom
    • CommentTimeOct 28th 2007
     
    Starting a new house - this is your opportunity to design it so it doesn't need a heating system at all - woodburner as occasional backup maybe. The knowledge is just emerging - here's the background (lots of reading for you!):
    http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=685&page=1

    Summary of the key writings on the subject, from http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=770&page=1#Item_20:

    http://www.primedesign.us/self_heating_houses/pahs_article_1.html - all you need to know, really, about John Hait's PAHS, the purist no-machinery concept
    http://www.primedesign.us/self_heating_houses/self_heating_houses_files/frame.htm esp frame 18 of this Powerpoint by Engineer Joe Anderson
    http://www.EinsteinCode.info to buy the ebook

    http://www.greenershelter.org/index.php?pg=3 - all you need to know about Don Stephens' AGS, which judiciously uses machinery to make it work better, in more situations
    http://www.greenershelter.org/TokyoPaper.pdf - ditto
    http://www.greenershelter.org/index.php?pg=2 - comparison between PAHS and AGS

    What do you think?
    • CommentAuthorThinfourth
    • CommentTimeOct 28th 2007
     
    Well i am not going to go down the road of a full eco house due to expense and wanting a house designed to my taste. The house will be north of aberdeen so not the warmest place in the world so i see additional heating being needed occasionally.

    I will read through the stuff But still my questions remain

    As two heating systems The log burner will be the main heat source for heating and hot water but i want a back-up for cold days and when we haven't got time for getting the log burner going.
    •  
      CommentAuthorfostertom
    • CommentTimeOct 28th 2007 edited
     
    Posted By: ThinfourthI will read through the stuff
    Note that it's not what it seems at first glance - the thinking derives from underground houses, but the point is that it's now viable for conventional-looking above-ground houses - particularly allowing (even requiring, in order to work) much more glazing than current Bldg Regs normally allow. If in doubt, I'll explain. The approach was developed in NW USA mountainous areas, so your climate no problem!
    • CommentAuthorJohan
    • CommentTimeOct 29th 2007
     
    Posted By: ThinfourthConsidering a new build house and thinking a few things over. firstly central heating

    We are going to have underfloorheating and a big feck off wood burning stove. For sake of connivence we want to have a easily controlled option also for heating instead of having to build a fire every time.

    So questions are

    1 how to have two heat sources in one central heating system is this easy enough

    2 How to even out the output of the log burner as it will be left damped down during the day and then when we get home it will be stoked right up and this will then produce way more heat then is needed so is there a way to even out this heat output and store it.

    3 If the system temp gets too high is it easy enough to dump the excess heat to maybe a radiator range sat in the wood store
    Yes, it's possible. You need an accumolator tank. This has been discussed several times before. Please do a search on the forum! :smile:

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