On the inside of the RV, does the furnace look like a square grill like shown in Persistent's post #5 link? if so, all you'll see from the outside is a small metal plate with one or two circular exhaust vents. Maybe has "HOT" stamped into it. Nothing really to access from the outside.
__________________
2012 Aspen Trail 2710BH | 470 watts of solar on the roof | 2x6V GC batteries | 1500 watt PSW inverter | Micro Air on A/C | so far strictly boondocking
|