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Plumbing / Re: hot tub heating

« on: September 18, 2010, 03:28:41 AM »

i have no hot tub..and i am only guessing but i would say you would just need to cut into your hot tub return line (before the heater)use a heat exchanger and a mixing valve...set teh mixing valve to your desired temp and thats it..so the cost would be ( i agree ) around 600 to 1000..you would need an exchanger...the  mixing valve and the pex from the supply and return of your OWB to the tub and what ever fitting you need to do the hook up