These are some mighty cold knowing answers to cold weather living in a TC in the above, especially the use of block foam insulation as an extra blanket strapped around and under the the base. The Swedish TC looks like it's built for the circumstances in which they find themselves. i'm certainly no expert like the folks above who have responded, but I can add what I wish we had done, or had along on some of our 'cold' TC outings. Early on, and count this as a cautionary tale, the coldest we've ever camped in was 05 deg. F. Without any winterization and we found out the hard way that the first thing to freeze up was the black tank outflow. Without the outflow, sooner or later you are stuck. Without heated tanks decide whether you are going to go:
1. Wet
2. half-wet or half-dry, take your pick
3. dry.
Without heated tanks our response has been to drain the entire water system, drink and cook with bottled water and flush the toilet with straight 100% RV antifreeze (good down to minus 40F). We have done this and it works well.....for a short while. After about a week of measuring out a tiny amount of RV antifreeze, we with our tiny tanks were done.
The only woe here is there is an expiration date certain on how many antifreeze flushes you can do without a blackwater dump of some kind. And as above, what to do if your outflow freezes.
Another thing is to take many extra bottles of propane along to plug into the system as the winter progresses.
The bottom line, as i see it is: how high is your cold pain threshold? My ancestory are a lot of Finns, and I have a high pain threshold to cold, but the cushy American lifestyle; getting older and small range of comfort level has done me in. I don't care how well insulated your camper is, if you run out of fuel for heat the temperature drops regardless. jefe
'01.5 Dodge 2500 4x4, CTD, Qcab, SB, NV5600, 241HD, 4.10's, Dana 70/TruTrac; Dana 80/ TruTrac, Spintec hub conversion, H.D. susp, 315/75R16's on 7.5" and 10" wide steel wheels, Vulcan big line, Warn M15K winch '98 Lance Lite 165s, 8' 6" X-cab, 200w Solar