Originally Posted by Jim Bennett
Bigfoot has about the only true 4 season FG trailer out there. Their holding tanks are inside, and the shell is a double layer of fiberglass with insulation in between. A really good unit, but much heavier than others of the same size.
I think all the 21 and 25 foot models were of this construction.
A standard Oliver
Legacy Elite II 23.5 foot has all of its plumbing, valves, holding tanks and water lines as well as the furnace
and water heater contained between the two hullls. Nothing is exposed to the elements. Ambient heat from the furnace
and water heater is sufficient to easily keep everything between hulls at above freezing temps. There is insulation on the inside of both of the hulls. The windows
are all double pane. These units pass all the criteria for 4 season use.
Even our former 17 foot Oliver
, with not nearly the insulation of the newer units, did not freeze up and kept us comfortable in temps down to the lower 20's on a blustery, snowy, freezing night on the Colorado/Kansas border with nothing more than the heat strips in the A/C for warmth.