Pamela Regentin on wed 11 oct 06
I just got myself a 16cf gas updraft kiln. It is in my barn that is new construction. We have concrete floors and will put cement board over the wood walls. The roofing is metal with wood 2x4s. The roof is at a slanted angle and the average space between the top of the kiln and the metal roof is 4.5 feet.
I intend to have a hood made with a double wall capped chimney going through the roofing above the kiln to contain and funnel the heat above the kiln. I'd appreciate any input on how this hood should be made. What type of material is necessary? Would galvenized work or would there be too much heat for it? Does it have to be black iron? Can it be soldered? Can the shape be a simple box (less expensive to make) or should it be angled to the chimney? Is the hood even that necessary?
Thanks!
Pam
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Marcia Selsor on wed 11 oct 06
Mel gave some great advice a year or more ago about using fiber
sleeves for insulating chimnies. If you go through the archives ,
maybe you'll see some good info. I would recommend stainless over
galvanized and zinc fumes burn off the galvanized when it gets hot.
Maybe you could find something at a recycling place. Look around.
Also the secondary air drawing into the hood should help cool the
primary air from the flu.It will still be really hot. Triple wall or
a fiber sleeve as Mel suggests is the ticket.
Marcia Selsor
http://marciaselsor.com
On Oct 11, 2006, at 12:57 PM, Pamela Regentin wrote:
> I just got myself a 16cf gas updraft kiln. It is in my barn that
> is new construction. We have concrete floors and will put cement
> board over the wood walls. The roofing is metal with wood 2x4s.
> The roof is at a slanted angle and the average space between the
> top of the kiln and the metal roof is 4.5 feet.
>
> I intend to have a hood made with a double wall capped chimney
> going through the roofing above the kiln to contain and funnel the
> heat above the kiln. I'd appreciate any input on how this hood
> should be made. What type of material is necessary? Would
> galvenized work or would there be too much heat for it? Does it
> have to be black iron? Can it be soldered? Can the shape be a
> simple box (less expensive to make) or should it be angled to the
> chimney? Is the hood even that necessary?
>
> Thanks!
> Pam
>
>
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> ______________________________________________________________________
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Marcia Selsor
http://marciaselsor.com
Michael Wendt on wed 11 oct 06
Pam,
if you have a pop rivet tool,
you can make a very nice vent
hood from galvanized metal.
Mine have been in service since
1976 and are still in great shape.
Make sure to have the vent pipe
be at least 12" inside diameter.
Adding a radiation barrier at any
hot spots is a good idea.
I just got the latest Harbor Freight
catalog and they now have non-
contact thermometers for $9.99!
at that price, you can afford to have
one and check surface temperatures
throughout you kiln room
Tom Wirt has said it often and very
correctly... keep the temperature as low
as you can in a wooden building unless
you want it to burn down.
you can see pictures of my kiln on
my web site:
http://www.wendtpottery.com
Regards,
Michael Wendt
Wendt Pottery
2729 Clearwater Ave
Lewiston, Idaho 83501
USA
wendtpot@lewiston.com
www.wendtpottery.com
Pam wrote:
I just got myself a 16cf gas updraft kiln. It is in my
barn that is new construction. We have concrete floors
and will put cement board over the wood walls. The
roofing is metal with wood 2x4s. The roof is at a
slanted angle and the average space between the top of
the kiln and the metal roof is 4.5 feet.
I intend to have a hood made with a double wall
capped chimney going through the roofing above the
kiln to contain and funnel the heat above the kiln.
I'd appreciate any input on how this hood should be
made. What type of material is necessary? Would
galvanized work or would there be too much heat for
it? Does it have to be black iron? Can it be soldered?
Can the shape be a simple box (less expensive to make)
or should it be angled to the chimney? Is the hood
even that necessary?
Thanks!
Pam
William & Susan Schran User on thu 12 oct 06
On 10/11/06 1:57 PM, "Pamela Regentin" wrote:
> I intend to have a hood made with a double wall capped chimney going through
> the roofing above the kiln to contain and funnel the heat above the kiln. I'd
> appreciate any input on how this hood should be made. What type of material
> is necessary? Would galvenized work or would there be too much heat for it?
Here's the link to Geil Kilns site with image of their venting system:
http://www.kilns.com/venting.htm
We have their 24 cu. Ft. kiln using their vent system that is made of
galvanized steel.
I think that you may want to consider stainless steel for your hood, or a
fiber board lined galvanized system as your kiln is an updraft.
--
William "Bill" Schran
wschran@cox.net
wschran@nvcc.edu
http://www.creativecreekartisans.com
steve graber on thu 12 oct 06
at a local junk yard for my 1st kiln i refurbished (old dickensen, about as big as a coke machine) i found a stainless steel steam table basin. i flipped it over, added four corner metal strips to support it, and cut a hole in the middle for the exit flew. they also sold old AC ducting stuff & i used some for the exit flew.
check your local junk yard for ready made stuff that'll be useful.
see ya
steve
William & Susan Schran User wrote:
On 10/11/06 1:57 PM, "Pamela Regentin" wrote:
> I intend to have a hood made with a double wall capped chimney going through
> the roofing above the kiln to contain and funnel the heat above the kiln. I'd
> appreciate any input on how this hood should be made. What type of material
> is necessary? Would galvenized work or would there be too much heat for it?
Here's the link to Geil Kilns site with image of their venting system:
http://www.kilns.com/venting.htm
We have their 24 cu. Ft. kiln using their vent system that is made of
galvanized steel.
I think that you may want to consider stainless steel for your hood, or a
fiber board lined galvanized system as your kiln is an updraft.
--
William "Bill" Schran
wschran@cox.net
wschran@nvcc.edu
http://www.creativecreekartisans.com
______________________________________________________________________________
Send postings to clayart@lsv.ceramics.org
You may look at the archives for the list or change your subscription
settings from http://www.ceramics.org/clayart/
Moderator of the list is Mel Jacobson who may be reached at melpots@pclink.com.
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Janine LaMaie on fri 13 oct 06
Pamela:
I recently built a studio and installed a gas kiln with hood and had to do
it to the City's codes. And I learned a little anyway. You've gotten
plenty of good advice here so far, but if I can be of any assistance,
please feel free to contact me.
I posted photo of kiln with hood at: http://www.flickr.com/people/jlamaie/
You may need to paste the link into your browser. I will post more photos
of completed studio later this year.
Good luck, happy firing, and cheers!
Janine
Tacoma, WA
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