Timothy Joko-Veltman on wed 8 nov 06
On 11/8/06, Robert Marquardt wrote:
> I'm currently involved in a small electric kiln installation.
> The question came up if there was a need to provide ventilation for an electric kiln if no hazardous glazes were used....such as ones containing lead, uranium, etc.
>
> the kilns would be in an 18,000 square foot warehouse.
>
> I'm open to all pros/cons/suggestions/admonishments and especially certain situations to avoid.
Don't take my word alone, but ventilation is a good idea. At about
900-1000 C, sulphur disassociates, leaving the body and glazes (and
most will have a little bit), and though it may not be the deadliest
of substances, I wouldn't want it hanging around.
Arnold Howard on wed 8 nov 06
From: "Robert Marquardt"
> The question came up if there was a need to provide
> ventilation for an electric kiln if no hazardous glazes
> were used....such as ones containing lead, uranium, etc.
------------
You might consider the other advantages of the downdraft
vent besides removing fumes.
A downdraft vent also pulls fresh oxygen into the kiln,
which helps burn carbon out of the clay. Heat distribution
is a little more even too. People have reported that the
Kiln Sitter tube lasts longer.
One other advantage of the downdraft vent is that you can
leave the lid closed throughout the firing. Without the
vent, you will need to remember to close the lid from the
vented position.
Sincerely,
Arnold Howard
Paragon Industries, L.P., Mesquite, Texas USA
ahoward@paragonweb.com / www.paragonweb.com
Catherine on wed 8 nov 06
Hi,=0D
=0D
Given that my kilns are outdoors, is venting of any important use or
necessity to me? =0D
Does it make for better glazes? I'd thought it more a safety factor. =0D
But maybe it's more than that?=0D
=0D
Thanks for all the good info,=0D
=0D
Catherine in Yuma, and still half asleep from watching too many election
returns.=0D
Imagine! Yuma has an initiative to make English the official languag=
e!=0D
=0D
-------Original Message-------=0D
=0D
From: Arnold Howard> The question came up if there was a need to provide=0D
> ventilation for an electric kiln if no hazardous glazes=0D
> were used....such as ones containing lead, uranium, etc.=0D
------------=0D
=0D
You might consider the other advantages of the downdraft=0D
vent besides removing fumes.=0D
=0D
A downdraft vent also pulls fresh oxygen into the kiln,=0D
which helps burn carbon out of the clay. Heat distribution=0D
is a little more even too. People have reported that the=0D
Kiln Sitter tube lasts longer.=0D
=0D
Arnold Howard
David Berg on wed 8 nov 06
Venting may help prolong the life of the elements.
David
On Nov 8, 2006, at 12:02 PM, Catherine wrote:
> Hi,
>
> Given that my kilns are outdoors, is venting of any important use or
> necessity to me?
> Does it make for better glazes? I'd thought it more a safety factor.
> But maybe it's more than that?
>
> Thanks for all the good info,
>
> Catherine in Yuma, and still half asleep from watching too many
> election
> returns.
> Imagine! Yuma has an initiative to make English the official
> language!
>
> -------Original Message-------
>
> From: Arnold Howard> The question came up if there was a need to
> provide
>> ventilation for an electric kiln if no hazardous glazes
>> were used....such as ones containing lead, uranium, etc.
> ------------
>
> You might consider the other advantages of the downdraft
> vent besides removing fumes.
>
> A downdraft vent also pulls fresh oxygen into the kiln,
> which helps burn carbon out of the clay. Heat distribution
> is a little more even too. People have reported that the
> Kiln Sitter tube lasts longer.
>
> Arnold Howard
>
> ______________________________________________________________________
> ________
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>
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> melpots@pclink.com.
David Berg
dberg2@comcast.net
http://bergstoneware.com/
Ron Roy on wed 8 nov 06
Hi Robert,
Yes - do it - it will pay for itself in saved elements - along with all the
other benefits.
RR
>I'm currently involved in a small electric kiln installation.
>The question came up if there was a need to provide ventilation for an
>electric kiln if no hazardous glazes were used....such as ones containing
>lead, uranium, etc.
>
>the kilns would be in an 18,000 square foot warehouse.
>
>I'm open to all pros/cons/suggestions/admonishments and especially certain
>situations to avoid.
>
>thanks
Ron Roy
RR#4
15084 Little Lake Road
Brighton, Ontario
Canada
K0K 1H0
Robert Marquardt on wed 8 nov 06
I'm currently involved in a small electric kiln installation.
The question came up if there was a need to provide ventilation for an electric kiln if no hazardous glazes were used....such as ones containing lead, uranium, etc.
the kilns would be in an 18,000 square foot warehouse.
I'm open to all pros/cons/suggestions/admonishments and especially certain situations to avoid.
thanks
William & Susan Schran User on thu 9 nov 06
On 11/8/06 9:54 AM, "Arnold Howard" wrote:
> A downdraft vent also pulls fresh oxygen into the kiln,
> which helps burn carbon out of the clay. Heat distribution
> is a little more even too. People have reported that the
> Kiln Sitter tube lasts longer.
Amen Arnold!
AND, removing the sulphur fumes from the kiln, there will be less corrosion
of the brick and the metal skin.
DO IT! Get a vent, a direct vent, on the kiln!
--
William "Bill" Schran
wschran@cox.net
wschran@nvcc.edu
http://www.creativecreekartisans.com
William & Susan Schran User on thu 9 nov 06
On 11/8/06 12:02 PM, "Catherine" wrote:
> Given that my kilns are outdoors, is venting of any important use or
> necessity to me?
>
> Does it make for better glazes? I'd thought it more a safety factor.
>
> But maybe it's more than that?
How outdoors is outdoors?
Is it in an enclosed shed? Under a cover?
I think having a direct vent installed, even on an outdoor kiln is
beneficial in helping to maintain a cleaner oxidizing atmosphere in the kiln
and helping, with a downdraft system, to achieve more even firing temps top
to bottom.
Clays will release sulphur dioxide, and even though having the kiln outdoors
will assist in blowing the fumes away, the sulphur will still eat up the
interior of the kiln. The vent will assist in removing those fumes before
they can damaging the kiln interior.
--
William "Bill" Schran
wschran@cox.net
wschran@nvcc.edu
http://www.creativecreekartisans.com
Catherine on fri 10 nov 06
Since it rarely ever rains in Yuma, my kilns set out in the open a safe
distance from the rear of the house. There's a grill cover over each jus=
t
in case, but more to keep the endlessly blowing sand-dust off them. When
they were on a covered patio at our previous home, so much sand-dust blew
into the controls that the controls had to be disassembled and cleaned.=0D
=0D
I'll give some thought to a vent. Have to price them out and see if the
cost offsets the additional life of the kiln.=0D
=0D
Thanks to all who helped with all this information. ClayArt is great!=0D
=0D
Catherine in Yuma=0D
where it's a balmy 83=BA but may drop to an icy 57=BA tonight.=0D
=0D
-------Original Message-----.=0D
>On 11/8/06 12:02 PM, "Catherine" wrote:=0D
=0D
> Given that my kilns are outdoors, is venting of any important use or=0D
> necessity to me?=0D
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=0D
William "Bill" Schran wrote:=0D
=0D
How outdoors is outdoors?=0D
=0D
Is it in an enclosed shed? Under a cover?=0D
=0D
I think having a direct vent installed, even on an outdoor kiln is=0D
beneficial in helping to maintain a cleaner oxidizing atmosphere in the k=
iln=0D
and helping, with a downdraft system, to achieve more even firing temps t=
op=0D
to bottom.=0D
Clays will release sulphur dioxide, and even though having the kiln outdo=
ors=0D
will assist in blowing the fumes away, the sulphur will still eat up the=0D
interior of the kiln. The vent will assist in removing those fumes before=
=0D
they can damaging the kiln interior. =0D
--=0D
William "Bill" Schran
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