Ok like I promised here are a few pics of my latest project. We now heat our water with our woodstove. The stainless tank beside the stove was free from a neighbor. It was part of a salt water treatment system in someone's home and certified to use in a pressurized system. The tank is now being used as a storage/buffer tank that circulates heated water via thermal siphon. Once it reaches temperature a small pump kicks on and circulates that water into a second storage/buffer tank hiding inside a closet located directly behind the stainless tank. The controller is set to cooling with a sensor on the stainless tank. Once the stainless tank reaches a preset temp the circulator turns on and runs until a preset lower temperature is reached. Its actually very quiet and you don't even hear it running.
These tanks feed a third tank in the system. When running there is about 112 gal of hot water available. Anyhow, there is actually much more to the system with proper safety measures installed. I don't recommend doing this because if you don't know what your doing it can be very dangerous.
Early numbers are very encouraging. Up to this point we have been averaging 70-75 KWH/day. We tend to use a good bit of hot water because we also use it to cycle thru our floors if the suns not shining (our house is passive solar) Anyhow, we now average 19-21 KWH/day. We should see a massive difference in our electric bill.
Sorry for the crappy cell phone pics
This photo is before I plumbed the discharge for the P/T valve for this tank. Still gives a good idea of whats going on
I dedicate the rest of the thread to finishing the cabin. Honest