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Old 09-14-11, 07:36 PM   #4
Ryland
Master EcoRenovator
 
Join Date: Mar 2009
Location: Western Wisconsin.
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If you really really need to do this, use a short stack of car radiators, but even then, I and everyone else has to ask why you are bothering with heating air if you want to heat water? air holds so little heat that it makes a really lousy transfer fluid.
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