Please, if you have not tried turning yours on yet, check the integrity of the coil first and do not stand with your face in the path of the airflow!
We figured out how to turn ours on, and it blew firey sparks in both our faces! VERY startling, and could have been very ugly!! Turns out the coil was trashed and we have searched and searched to find a replacement with no luck. Anyone know where to find one? I think it is a Coleman Mach 2 or 3 unit.
And yes, from what we understand, it is to knock the chill out of the air, not to heat your whole camper. That is the furnace's job.