HI. I have a unique situation. I have a structure, treehouse/cabin
that is about 150 sq. feet. I am looking for a small propane heater
that is vented. I have seen very small units, similar to what would be
in a hunting blind. The one i saw was vented via 3'' stove pipe.
Does anyone know of a source to get such a heater?


If your situation was really unique, there'd be no canned solution.
SInce it's not. www.zodi.com has a propane/forced-air heater
that's designed for tents and RVs/