FYI...Just tried an experiment today. 33 degrees out so I closed the roof vent plugged in a new CO & explosive gas detector I got at "Maynards", taped over the flow through vents and turnred on the "Little Buddy" heater on HIGH. I left the trailer all closed up and monitored the detector through the window and waited for either the alarm to go off or the heater to shut down with the "low O2" shut off feature. It took almost an hour before the low oxy sensor shut the heater down. When I checked the CO detector's CO level history readout, it recorded 29 PPM(parts per million), well below the low level exposure limit of 50 PPM. Interesting
Next experiment will be same, but with flow throughs open and roof vent open about 1 inch. I want to see what the CO level history records with things set up like that.
I too have great cold weather camping gear, I'm just curious about what the heater will do to the air when I do run it