You lose half an inch of the top of the kiln, so the actual usable height is 6.5".
It is cast ceramic fiber refractory, similar to board refractory material, but cast into a mold shaped as we need for the kiln body.
No, because of the design of the heating element and the use of cast refratory, we use less energy. Most of the energy spent on brick kilns is heating up the very dense bricks. It takes quite awhile to get a brick kiln up to temperature. The bricks contain a lot of mass and it takes a lot of energy to heat up that mass.
A test run on the kiln ran a 7 hour 30 minute "cycle" - 1 hour 40 minute heat up and garage, then a 5 hour 50 minute annealing cycle with a boro striking cycle built in.
The heating elements were actually energized for 3.1 hours (there's a built in hour meter on the kiln). The kiln element is .975 kW. At my house, I pay $0.166 kWh. So, .975 x 3.1 x 0.166 = $ 0.502 to run the kiln. Fifty cents!
__________________
Ed Peterson
Sales Manager
Aura Visual Concepts, Inc.
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: LE2009
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