Inquiry (采购产品): nEED hELP Hi : I hope you can help me -I have an old heat exchanger of yours P/N 5-685-06-041-003. Heres the questions. I just bought an outdoor wood boiler and would like to use this for an exchanger. (Indoor boiler is 155,000 BTU) How much surface area is pressent for this heat exchhange? ALternatively, could this be used to exchange heat for a spa - or would the chemicals in the spa destroy it? Mike **** Hidden Message ***** Mike niz 13835 USA Company: powers of cny E-mail: yukonheart@gmail.com **** Hidden Message ***** yukonheart@gmail.com