Hi Vettster
I assume by your name you have a 66 vette. Cool vehicle.
Anyway, we have a 3250 BC. While ours is not drafty, it does not retain heat like a house would.
Here a few things I have noticed on ours-not sure if yours is the same but something to look at.
Single pane windows do very little to stop heat transfer. You can actually feel cool air a couple inches away from these large windows.
The floor always feel cool. Even though they are "sealed" and have bubble inslulation above the corrugated panel, that is far from very efficent. When I dropped my underbelly, I found the rack from one of the slides had pulled the duct for the rear register off of the register so the heat that would have come out of the rear register was going into the underbelly. That inturn left a "hole" for cold air to come staight into the trailer.
I have read that there is no insulation in the slides. I have only been in one slide on my trailer and yup-no insulation. I do not know if this is a fact on all the trailers.
The inslution on my back wall did not begin until about a foot above the floor. I do not know if this is by design or just a fluke on my trailer.
My bedroom stays warm but it does not have some of the same issues as the main living area. eg- bedroom is over the basement which means the floor is protected a little better than the main living area. There are also no large windows in the bedroom.
One other thing I have done is staightened out all the duct work underneath for better airflow from the heater.
All these things are pretty typical for any trailer.
Some of these guys that full time or camp up north will have better ideas on what to do. I just put on fuzzy slippers.
