Wow, lottsa comments 8) A few comments. I was planning on needing two pumps so thats not an issue. Also having the core mounted above the fan is a major part of the plan. If the bong half is off or dry, the closed wb loop will still work as the bong acts like a big shroud. Also the core acts as the extra medium other people use in their bongs to increase surface area for the water. I've seen anything from ping pong balls to scotch brite pads used, all to cause more evaporation. I figure with the added surface of the core plus the bit of heat there, thats where most of the evaporating will take place. As I understand it, that where the real cooling takes place, a the water evaporates, not as the drops hit cool moving air. Humidity shouldn't be a real problem for now, as its winter here and gas furnace really dries the air out. It's about time to setup my humidifier anyway. My biggest concern would be buildup on the core. I was thinking of using distilled water and the additives that would go in my humidifier--bactrostat and buildup preventer. Well this started as just a theory, but I think I'm really gonna haveta try it now. I've got tons of plexi, a new table saw, lottsa clamps and glues, so I might as well. The toughest part looks to be getting a good seal around the core and it still being removeable.
peace.
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