The main thing I have been thinking about lately is, "How am I going to heat my digetser?" I have been looking into all sorts of different things from having a wood burner nearby heating water and circulating it around the digester to using my hot water heater with T's in the cold and hot side making a loop to heat the digester. I would make a radiant floor part and also wraps around the side of the tank. I have been watching the woes from others that post on here, and on the facebook page about heating them.
My conclusions at this point are:
If the digester is outside, the Jean Pain method would work best in cold climates such as here in Pa.
If it's located in a basement, as I am looking at doing, using the hot water heater to heat coils around the digester inside the insulation. A small pump would pull hot water from the tank and circulate it back to the cold side of the tank. As I am already going to be making more gas than I am using even in the current cold conditions, I shouldn't have any problem with adding the usage to heat the tank.
What are your thoughts on this?