I use a little catalytic heater in the van. Catalytic heaters -- when
properly operating -- don't generate carbon monoxide though they do
consume oxygen and create carbon dioxide. "Crack your window," is the
advice given if you plan to run one of these things for long. But humans
and other critters also burn O2 and make CO2. I wonder how a little
1600/2800 btu heater compares with a human in terms of O2 intake, CO2
output?

--
Mike "Rocket J Squirrel" Elliott
71 Type 2: the Wonderbus
84 Westfalia: Mellow Yellow ("The Electrical Banana")
74 Utility Trailer. Ladybug Trailer, Inc., San Juan Capistrano
KG6RCR