Insulated 5th wheel

Colo Native wrote:
Mine has R52 floor, roof and front cap

Yea right! Or do you mean R5.2?
R52 would indicate your walls are about 14 inches thich.

You should be able to verify the make and model by the VIN number and then go from there. For instance, our VIN will tell you we have a 2011 Heartland Bighorn, model 3055RL. Research shows this model is a full timing version, then further research finds the construction and R factors which can give you good information.

Craig A wrote:
I just purchased a 2015 Avalanche and the brochure discusses quite a bit about the insulation used. Check out this Avalanche

Brochure expresses best use for extended trips and family vacations.

I just purchased a 2015 Avalanche and the brochure discusses quite a bit about the insulation used. Check out this Avalanche

If you find a Newmar don't let it go is one of the top class fiver.

You could look for a used Carriage unit. They are all weather, and built like a tank. They built their own frame, and kept Lippert out of it. Many of them came with the Big Foot leveling system. best trailer I've ever owned.

Mine has R52 floor, roof and front cap

I seriously doubt if there is a way you can find out about a units insulation values from the vin #.
Likewise, be sceptical about mfgrs claims of insulation values as these are commonly only accurate in areas without ductwork, tanks, slide floors or roofs, inside frame, to sum it up, a gimmick.
Even dual pane windows are suspect when ( always? ) their frames are the very heat conductive aluminum. Houses have not used aluminum framed windows since the early 60s or '50s So, Be prepared for condensation or use a dehumidifier to minimize wall panel damage or degradation of insulation values from damp insulation due to aluminum window frames.
Many towable makes have sealed heated bellies and tanks suitable for freezing temps into the teens F. I consider these 3 season rigs, that can make it through some chilly spells, but not through prolonged cold or below 0 F ( -20 C ) for more than a few hours.
There are a few exceptions.
For true cold weather units proofed against freezing, that also are reasonable to heat (or cool in hot weather) the list is shorter.
Explore Excel, Arctic Fox, King of the Road, Teton Homes, Double Tree, Newmar, a few others.
They will not be easy to find or cheap, but the build quality, comfort and cost to heat or cool will make up for your time and cost.

My Sanibel has a R38 rating.

Montana, Cardinal, Cedar Creek are only three popular choices with decent insulation, sealed under bellies. Any of them can be comfortable down to the 20s with no problems IF you take precautions with water hoses.