

This is all BC DAVE's idea, from threads he posted on here. I saw his, emailed him about it a little, and was sold.
Its a Dickinson Newport P9000 direct draft propane heater. It has a stainless double walled vent pipe and exhaust cap. Fresh air is pulled from outside through the outer pipe into the combustion chamber while exhaust gas leaves the trailer through the inner pipe. Air from inside the trailer is not used for combustion so a fresh air vent is not needed. Exhaust gases from isolated combustion are taken out via the chimney pope, so no moisture is created.
The cat's meow from all I've seen and heard of. And much safer than Mr Heater's, Buddys, and all those propane heaters like the one I was using. No more worrying about falling asleep and not waking up, ever. And YES, my carbon monoxide detector will still remain inside, functioning, in the extremely remote chance something goes wrong. The heater is also equipped with a fan to maximize heat output, reduce soot, and cool the air intake chimney. It only draws 0.2 amps on 12 volts. Nothing.
I screwed a backing board onto the wall for support and mounting, and because that's what BC DAVE did!
I mounted the heater to level it, check for location convenience/access, and for measurement purposes.
Vent pipe attached for measuring/fit
Vent pipe bent into shape to exit side of trailer and mark the dreaded 3-inch hole location.
Side view of vent pipe
Oh my God. This was the hardest part! Drilling a 3-inch hole through a perfectly good wall of the trailer.
Right through the wall and outside skin! Now I'm committed.
Outside vent cap screwed on.
In she goes, pipe secured inside and out, and bent to shape and fit tightly. DONE!

BC DAVE says his will roast him out in the BC cold, and he keeps a window open. I'll find out how it works this fall, but I have no doubts I'll love it.
Thanks DAVE!