Build A Compost Water Heater For Hot Water Abundance
Step 3: Lay the Hydronic Loop
Coil 1/2″ plastic pipe at the bottom of the mound and hold it down temporarily with cinder blocks. Run the end of the pipe outside of the ring of hay bales, to be connected to your water source.
Step 4: Chips and Sawdust!
Chip wood into the pile, intermittently stopping to throw shovelfuls of sawdust in. The high carbon content of both materials create a lot of heat when decomposing.
Step 5: Continue Laying Water Pipe + Building Up the Mound
Once you get started, this project should take 1-2 days of labor. Keep looping in water pipe and building up the hay perimeter as you add woodchips and sawdust. Throw in some manure – any animal will work – if you have any.