Other than maybe the noise, I can't understand why not just use the furnace. I traded my Timber Ridge 240RKS in last year, and find I miss it for camping in the colder winter. It was reasonably well insulated, and the furnace, although loud seemed fairly efficient as we only went through a couple tanks or so a year mostly dry camping, 45-60 nights a year. We used the rig down several times in below zero temps. I understand the electric heater when in a campground with hookups, but not sure of the why the gas given the downsides of ventless heaters.
It's definitely time to start sorting out the heating though. On this weekends trip for us, the nights were well below freezing and we got a little snow as well. Another month or so and it will be time to head south for any camping we might do.
