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Old 02-12-2018, 10:27 AM
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Franklin Sankar Franklin Sankar is offline
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Door configuration for top of electric furnace

Which is better the flat door on top or the hood and a front door on the hood.
Franklin
Ps sorry about the sideways pic. It happens with iPad.
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Old 02-12-2018, 12:03 PM
Rick Kellner Rick Kellner is offline
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Among many other factors, I imagine the 'answer' (for starters) is largely going to depend on whether or not the furnace is gas fired, or a wire melter. Then the size of the furnace would be the next thing I'd be considering.

I'm at a loss in thinking of many compelling reasons to have the crown and vertical door, if it is for smaller sized electric furnace. That might be more conducive to having enough space for efficient combustion in a gas furnace.

Maybe it's a philosophical question.
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Old 02-12-2018, 01:57 PM
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Franklin Sankar Franklin Sankar is offline
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Lol Rick. Yes it is electric. It works with the flat door on top except when you open the door I think lots of heat escapes . I was trying to trap some heat hence the attempt to make a hood over the port. Did not try it so cant give more info on what it will do. I expect the extra air space will increase the heat up time . Canít guess much more. It may be complete foolishness.
Franklin
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Old 02-12-2018, 02:19 PM
Eben Horton Eben Horton is offline
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If electric, go with the toilet seat door.
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Old 02-12-2018, 02:34 PM
Rick Kellner Rick Kellner is offline
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And the extra air space will add to operating expenses. Unless it's a furnace design (like a Denver) with elements up in the crown, that air space is also going to be far away from the bottom elements, and probably challenging to efficiently heat. The top elements are another can of worms altogether, and it seems like unnecessary complexity for perhaps no real gain.

What about thinking about a baffle in the lid, to trap heat in the firing chamber? Then you have the added benefit of minimizing element exposure to glass fumes while melting. Then when you flip open the door, the only primary mode of heat loss is going to be from the top opening of the crucible being exposed.
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Old 02-13-2018, 05:56 AM
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Franklin Sankar Franklin Sankar is offline
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Love the name Eben. Thanks Rick . I will work with the toilet seat and hope I donít end up with crap. Sorry could not resist that.
Franklin
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