I have a wood stove in the shop that I can experiment with, to get thing figured out, before I tear into my 'in house' stove. What I'm intersested in: Is there a certain type of copper that is easier to work with (bending it into the coil, that I figure will be some 6 to 8" dia, then some 2 feet tall) I'm conserned about the tubing 'kinking'. I'm thinking this will thermosyphion into a 30 gallon tank that will be just the other side of the wall the stove is up against (some 4-5 feet 'coil to storage tank') I'd like to get any input you care to offer, as far as dia. of tubing/size of storage tank/etc. I use the stove for an hour or 2 in the morning and for 3 or 4 in the evenings. It is a homemade stove, I can cut down the oxy intake some, but it is by no means a 'smokin' stack/ air tight type. Thanks for your time and knowledge.