Kev that heater does produce co2 just be careful any unit that burns any fuel will indeed off gas if you read under specifications all the way at the bottom the last line says (use only in vented locations) I would hate to hear that you woke up dead because of an undersized Forest River furnace not being able to keep your camper warm. If it were me and you had to use something like that type of unit I would have at least 2 co2 detectors one in the room where the unit is and one in the bedroom on the wall next to where my head lays on the pillow. Confided space plus propane burning unit = trouble.
Just my 2 cents
Professional Plus Services Inc.
Heating AC and Ventilation
06 3500 Laramie Dodge Mega Cab 4x4 5.9CTD Short Bed Dually
13 Sandpiper 365SAQ Fifth Wheel
05 Chevrolet Tahoe
93 F-250 XLT 4x4 Diesel Banks Sidewinder (gone but not forgotten)
79 Jeep CJ-7
77 F-250 Crew Cab Short Bed 4x4