Hi, So I have everything set up for my in slab heat. Tubing, manifold, circulator pump expansion tank, etc.. The only thing I am still working on is the heating source. So what I plan to do is this. I have an indoor wood burning stove that I have installed a 1" Stainless steel hot water loop inside the fire box. Beside my stove, I have a 55 gallon drum I plan to have sitting on some blocks to make it a little higher than the loop. From the bottom of the tank the "cold" line will go into the bottom of the loop, from there the top side of the loop will angle back over and come back into to tank at the top of the tank, but still remain under the water level. This will hopefully heat up the entire tank once the stove has been running, via thermosiphon/natural convection. Now, inside of the 55 gallon tank. I have 2 Radiators submerged that will work as a heat exchanger. Once the tank is hot enough, the pump will kick on and pump the closed loop fluid thru the two submerged radiators, pulling the heat from the "hot water storage tank" through my floor and returning back to the radiators. I am confident this will work although I am sure I will have some tweaking to do once everything us up and running. I welcome any comments or advice on this setup! Has anyone attempted anything like this before? If this works I plan to replace the 55 gallon steel drum with a Stainless steel one In the future so rusting out won't be a problem. So if this all works the idea is that I will only be running a small circulator pump to heat my entire 3,000 sq ft home!