Cob: RE: Re: masonary heater

Mon Jan 14 05:27:08 PST 2002

This is a multi-part message in MIME format.

------_=_NextPart_001_01C19CFF.2A8D5DFB
Content-Type: text/plain;
	charset="iso-8859-1"
Content-Transfer-Encoding: quoted-printable

I just finished my "cob" masonry heater. Actually I'm not sure what I
should call it, but that sounds as good as anything.=20
basically I took a mexican ceramic "patio" heater, stuck six inch stove
pipe in the top and ran it out my school bus / bedroom.=20
=20
The first thing I noticed is that yup, it takes longer to heat now. Only
have fired it up once so far. It has about 6 to 8 inches of cob around
the ceramic=20
pot, I'll take some photos at some point. It draws really nice. the flue
/ 6 inch pipe takes a 90 turn at the top of the heater, goes a bit
vertical for about=20
4 feet, then another 90 degree turn, about a two more feet, out the bus
window, another 90 degree turn to the right, (to the bus outside mirror)
the 90=20
degrees up for two 6 inche stove pipe sections.=20
=20
the cob stops a the top of the stove and the rest is just stove pipe.=20
=20
It's been a bit warm the last few days and will give her another test
when the next cold spell hits middle GA.=20
=20
maybe I can coordinate the photos and the cold spell together !
=20
L&L
Pat=20
www.gypsyfarm.com
=20

-----Original Message-----
From: Robert Bolman [mailto:robtb at efn.org]
Sent: Wednesday, January 09, 2002 5:11 AM
To: Roger Entwistle; coblist at deatech.com
Subject: Cob: Re: masonary heater

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

------_=_NextPart_001_01C19CFF.2A8D5DFB
Content-Type: text/html;
	charset="iso-8859-1"
Content-Transfer-Encoding: quoted-printable

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META HTTP-EQUIV=3D"Content-Type" CONTENT=3D"text/html; =
charset=3Diso-8859-1">

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<META content=3D"MSHTML 5.00.2919.6307" name=3DGENERATOR>
<STYLE></STYLE>
</HEAD>
<BODY bgColor=3D#ffffff>
<DIV><FONT color=3D#0000ff face=3DArial size=3D2><SPAN =
class=3D657352713-14012002>I just=20
finished my "cob" masonry heater. Actually I'm not sure what I should =
call it,=20
but that sounds as good as anything. </SPAN></FONT></DIV>
<DIV><FONT color=3D#0000ff face=3DArial size=3D2><SPAN=20
class=3D657352713-14012002>basically I took a mexican ceramic "patio" =
heater,=20
stuck six inch stove pipe in the top and ran it out my school bus / =
bedroom.=20
</SPAN></FONT></DIV>
<DIV><FONT color=3D#0000ff face=3DArial size=3D2><SPAN=20
class=3D657352713-14012002></SPAN></FONT>&nbsp;</DIV>
<DIV><FONT color=3D#0000ff face=3DArial size=3D2><SPAN =
class=3D657352713-14012002>The=20
first thing I noticed is that yup, it takes longer to heat now. Only =
have fired=20
it up once so far. It has about 6 to 8 inches of cob around the ceramic=20
</SPAN></FONT></DIV>
<DIV><FONT color=3D#0000ff face=3DArial size=3D2><SPAN =
class=3D657352713-14012002>pot,=20
I'll take some photos at some point. It draws really nice. the flue / 6 =
inch=20
pipe takes a 90 turn at the top of the heater, goes a bit vertical for =
about=20
</SPAN></FONT></DIV>
<DIV><FONT color=3D#0000ff face=3DArial size=3D2><SPAN =
class=3D657352713-14012002>4=20
feet, then another 90 degree turn, about a two more feet, out the bus =
window,=20
another 90 degree turn to the right, (to the bus outside mirror) the 90=20
</SPAN></FONT></DIV>
<DIV><FONT color=3D#0000ff face=3DArial size=3D2><SPAN=20
class=3D657352713-14012002>degrees up for two 6 inche stove pipe =
sections.=20
</SPAN></FONT></DIV>
<DIV><FONT color=3D#0000ff face=3DArial size=3D2><SPAN=20
class=3D657352713-14012002></SPAN></FONT>&nbsp;</DIV>
<DIV><FONT color=3D#0000ff face=3DArial size=3D2><SPAN =
class=3D657352713-14012002>the=20
cob stops a the top of the stove and the rest is just stove pipe.=20
</SPAN></FONT></DIV>
<DIV><FONT color=3D#0000ff face=3DArial size=3D2><SPAN=20
class=3D657352713-14012002></SPAN></FONT>&nbsp;</DIV>
<DIV><FONT color=3D#0000ff face=3DArial size=3D2><SPAN =
class=3D657352713-14012002>It's=20
been a bit warm the last few days and will give her another test when =
the next=20
cold spell hits middle GA. </SPAN></FONT></DIV>
<DIV><FONT color=3D#0000ff face=3DArial size=3D2><SPAN=20
class=3D657352713-14012002></SPAN></FONT>&nbsp;</DIV>
<DIV><FONT color=3D#0000ff face=3DArial size=3D2><SPAN =
class=3D657352713-14012002>maybe=20
I can coordinate the photos and the cold spell together =
!</SPAN></FONT></DIV>
<DIV><FONT color=3D#0000ff face=3DArial size=3D2><SPAN=20
class=3D657352713-14012002></SPAN></FONT>&nbsp;</DIV>
<DIV><FONT color=3D#0000ff face=3DArial size=3D2><SPAN=20
class=3D657352713-14012002>L&amp;L</SPAN></FONT></DIV>
<DIV><FONT color=3D#0000ff face=3DArial size=3D2><SPAN =
class=3D657352713-14012002>Pat=20
</SPAN></FONT></DIV>
<DIV><FONT color=3D#0000ff face=3DArial size=3D2><SPAN =
class=3D657352713-14012002><A=20
href=3D"http://www.gypsyfarm.com">www.gypsyfarm.com</A></SPAN></FONT></DI=
V>
<DIV><FONT color=3D#0000ff face=3DArial size=3D2><SPAN=20
class=3D657352713-14012002></SPAN></FONT>&nbsp;</DIV>
<BLOCKQUOTE style=3D"MARGIN-RIGHT: 0px">
  <DIV align=3Dleft class=3DOutlookMessageHeader dir=3Dltr><FONT =
face=3DTahoma=20
  size=3D2>-----Original Message-----<BR><B>From:</B> Robert Bolman=20
  [mailto:robtb at efn.org]<BR><B>Sent:</B> Wednesday, January 09, 2002 =
5:11=20
  AM<BR><B>To:</B> Roger Entwistle; =
coblist at deatech.com<BR><B>Subject:</B> Cob:=20
  Re: masonary heater<BR><BR></DIV></FONT>
  <BLOCKQUOTE=20
  style=3D"BORDER-LEFT: #000000 2px solid; MARGIN-LEFT: 5px; =
PADDING-LEFT: 5px">
    <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 "post Y2K", I want to design a =
heated cob=20
    bench using a little blower to facilitate the combustion within a =
cast=20
    refractory "rocket elbow".&nbsp; Then I would plan on smaller =
diameter pipe=20
    traveling a greater distance to fully transfer the heat into the=20
    cob.</FONT></DIV>
    <DIV><FONT size=3D3></FONT>&nbsp;</DIV>
    <DIV><FONT face=3D""=20
size=3D3>Rob</FONT></DIV></BLOCKQUOTE></BLOCKQUOTE></BODY></HTML>

------_=_NextPart_001_01C19CFF.2A8D5DFB--