Im worried about the bellybag because its literally the only reason everything doesnt freeze! Even with it factory sealed and skirting, we have to keep the thermostats cranked up in the cold around here to keep the pipes from freezing.
The sewer line to the main bath is already under the skirting, and the pipe is insulated the entire length and it does freeze on occasion. Everything is under the trailer and insulated, the skirting although not insulated, is sealed up pretty well.
Up here, tearing into a bellybag is a HUGE deal. unless the crawlspace under the trailer is heated well, you end up with nothing but freezing problems, especially if you dont seal it up 120% when your done doing whatever you were doing in there. At -40c, the slightest breeze making its way under the trailer will freeze anything! Not to mention, if the bag is left open, a guy would have to keep it fairly warm down there to keep the inside floors from being extremely cold (which they already are)
But, either way, nothing is going to happen till summer, we have another 2 months of -30c to -40c weather ahead of us, this is no time to be swapping a furnace unless its dead!!
Out of curiosity, the Pellet boiler idea still looks like a viable option as the heating fuel costs would be drastically reduced. Im curious what kind of noise level i would be looking at by using an air handler and outdoor boiler, instead of a furnace, if any? (i would assume being a fairly basic setup it would be quieter than blowing through a typical gas/oil heat exchanger...?)