[Cob] cob/earth oven also heating hot tub intake?

[Raduazo at aol.com]

In a message dated 12/31/2004 2:05:19 PM Eastern Standard Time, 
karl at omelay.com writes:
i don't think copper is the best solution 
    It seems to me that the old wood stove water heaters just used galvanized 
iron and depended on convection to prevent the pipes in contact with the 
flames from exploding. Have you checked out water heaters for wood stoves?
Ed