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26-07-2012, 11:51 PM #1
using a condensing coil as a solar heater for hot tub
so i thought about laying out a conderser coil, building a frame with a glass opening and painting everything black. then using a submergible water pump to circulate water through it to heat the hot tub. i calculated i have about 400 feet of copper in this coil.
my biggest concern is the brazing material and how it will leach into the water.
any inputs? will it be a toxic bath or are the levels so low that it will not matter?
thanks
Art