Just got back from 3 days in Jasper.
It was around freezing at night. The furnace
was about at its limit. It probably took an hour at night to get the trailer up to room temperature. Having said that, it immediately warmed the floor area for our feet which was great and it took the chill off the air quite fast. The furnace was able to cycle on and off. I wouldn't be camping at much colder than that so the furnace size was right.
It is definitely not silent but at night while we were sleeping the noise drifted into the background of my brain and did not prevent me from sleeping. My son slept on the couch with his head right over the furnace and he hasn't complained/ said anything at all.
We used the reflectix material to cover 3 out of 4 of the windows
which gave us more than the usual amount of insulation. It also made it darker which was great for sleeping.
The current draw is about 1.7 A which is only slightly more that the incandescent interior lights
that pull 1.5 A.
Would I recommend the furnace? I would.