here's a good page on catalytic propane heater dangers:
http://www.psc.ca/safety_info/safety...93/sa93_01.htm

wrote in message
oups.com...
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?