Llewellyn Kouba on tue 19 oct 99
Dear Readers,
Last winter I bought a used Amaco electric kiln (Hf-105 model)and am
finally getting it installed. I think the maentanance man here wants to
vent the exhaust directly TO my 45 cu. ft gas kiln and I don't think this
is the way to go. I would feel safer if the electric went directly out the
(brick) wall. The 45 cu ft. gas kiln has a full hood asembly which floats
over the kiln and there is a one foot open space between the chimney and
the ceiling exhaust which is moving the air out. I have always had some
question as to weather the gas kiln is all that efficient and I just don't
think it is the most efficient way to vent the electric by putting the
exhaust hose from the electric to the gas kiln just because it might be the
easiest and shortest route instead of removing brick wall or windows. Any
input?
chris@euclids.com on wed 20 oct 99
> Last winter I bought a used Amaco electric kiln (Hf-105 model)and am
> finally getting it installed. I think the maentanance man here wants to
> vent the exhaust directly TO my 45 cu. ft gas kiln and I don't think this
> is the way to go. I would feel safer if the electric went directly out
the
> (brick) wall. Any
> input?
Hi,
The downdraft vents work well for this type of kiln. Since this is quite a
large rectangular kiln, a 'kiln-mount' or 'suspended' style would be best.
They are easy to install, plug into any standard household outlet (120
volts) &
are relatively inexpensive (for what they do).
Most 'pottery supply' places have them.
For some info & pictures see http://www.euclids.com/Orton.htm
chris
chris@euclids.com
www.euclids.com
800-296-5456
Cameron on wed 20 oct 99
I thought I'd put in my two cents worth here. Llewellyn is right
.. do not mix exhausts. Each kiln must be separately exhausted.
The hood arrangement on the gas kiln is a very common way of
collecting exhaust, but is, in my opinion a very poor system as it
robs you of any control at all over the very important exhausting
function. Although the elements of heat transfer, particularly as
they apply to flues and exhausts are well known, they are not
commonly known to designers of kilns. The large kiln engineering
firms have it well in hand, but most other kilns are designed
without the benefit of that knowledge.
A proper flue design establishes a direct connection with small,
engineered openings, finally leading to a sheet metal stack. If
you look at your furnace at home, or a space heater in a
commercial building, you will not see a hood, just a metal stack.
The principals involved are, for the most part, the same. Just
because the temperature inside the kiln is higher does not mean
that you must avoid a correct design.
In order to make the best of a bad situation, always be sure that
each kiln is exhausted separately.
Cameron
--
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Ceramic Services, Inc 1060 Park Ave. Bensalem, PA 19020
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