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Old 10-18-2004, 12:43 PM
David Paterson
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One issue in designing furnaces for minimum heat loss is the following issue:

If you replace 6" of Kastoloite 30 with 3" of IFB which has one half the heat loss, is this a break even situation?

Logic would say that since the Kastolite furnace is much larger on the outside, the larger radiating area would loose more heat. But how much more?

The issue becomes important when you look at using an expensive product like the microporous insulation in place of several inches of 6 lb fiber, which is very cheap.

Does anybody have either theoretical or practical knowledge on this issue? If you spend a lot of money on high tech materials, are you just saving space, or is there substantial real savings on energy consumption?
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