Cob: Re: masonary heater

Wed Jan 9 02:11:20 PST 2002

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I've been looking at some stuff on the mha website, (www.mha-net.org) =
that talks about masonary heaters in Belarus constructed using =
clay/earth.
    Has anybody any info/experience of building masonary style heaters =
using cob or similar techniques?
   =20
    A number of people have done heated cob benches which I've always =
seen as a poor persons's masonry heater.  They use a rocket stove type =
design to do the initial combustion and then run the combustion gases =
through (typically) six inch stove pipe embedded in the bench after =
which it goes up and ultimately exits the building.
   =20
    My understanding is that they suffer from a few problems.  For one =
thing they can draw very poorly because of all that horizontal flu.  =
Also, I understand that six inch round stove pipe isn't the most =
conducive shape to transfer the heat to the cob.
   =20
    Now that we're "post Y2K", I want to design a heated cob bench using =
a little blower to facilitate the combustion within a cast refractory =
"rocket elbow".  Then I would plan on smaller diameter pipe traveling a =
greater distance to fully transfer the heat into the cob.
   =20
    Rob

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<BLOCKQUOTE=20
style=3D"BORDER-LEFT: #000000 solid 2px; MARGIN-LEFT: 5px; PADDING-LEFT: =
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    <DIV><FONT size=3D3>I've been looking at some stuff on the mha =
website, (<A=20
    href=3D"http://www.mha-net.org">www.mha-net.org</A>) that talks =
about masonary=20
    heaters in Belarus constructed using clay/earth.</FONT></DIV>
    <DIV><FONT size=3D3>Has anybody any info/experience of building =
masonary style=20
    heaters using cob or similar techniques?</FONT></DIV>
    <DIV><FONT size=3D3></FONT>&nbsp;</DIV>
    <DIV><FONT size=3D3>A number of people have done heated cob benches =
which I've=20
    always seen as a poor persons's masonry heater.&nbsp; They use a =
rocket=20
    stove type design to do the initial combustion and then run the =
combustion=20
    gases through (typically) six inch stove pipe embedded in the bench =
after=20
    which it goes up and ultimately exits the building.</FONT></DIV>
    <DIV><FONT size=3D3></FONT>&nbsp;</DIV>
    <DIV><FONT size=3D3>My understanding is that they suffer from a few=20
    problems.&nbsp; For one thing they can draw very poorly because of =
all that=20
    horizontal flu.&nbsp; Also, I understand that six inch round stove =
pipe=20
    isn't the most conducive shape to transfer the heat to the =
cob.</FONT></DIV>
    <DIV><FONT size=3D3></FONT>&nbsp;</DIV>
    <DIV><FONT size=3D3>Now that we're &quot;post Y2K&quot;, I want to =
design a=20
    heated cob bench using a little blower to facilitate the combustion =
within a=20
    cast refractory &quot;rocket elbow&quot;.&nbsp; Then I would plan on =
smaller=20
    diameter pipe traveling a greater distance to fully transfer the =
heat into=20
    the cob.</FONT></DIV>
    <DIV><FONT size=3D3></FONT>&nbsp;</DIV>
    <DIV><FONT face=3D"" =
size=3D3>Rob</FONT></DIV></BLOCKQUOTE></BODY></HTML>

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