Alan,
Thanks for sharing this project with us. As you solve problems and move to the next phase it becomes a continuing story that may enable someone else to install a similar heat source for their home or business. It is interesting to see each step that you take.
You mentioned a concern about fire insurance. I have dealt with that by installing my remote controlled pellet burner outside in an insulated shed with non flammable siding and a metal roof. I pump hot water through insulated piping underground to a coil that sits in my interior air handler which is also connected to a heat pump. If the pellet stove fails the heat pump takes over. Different installation but similar concern about insurance.
