SOME trailers are sold as having "heated holding tanks" but the heat must come from the furnace. If THIS is the way yours is built, then using an electric would NOT provide heat to your enclosed belly as your furnace would. If your belly is NOT enclosed, it's a moot point and use any type of heat you like. Just remember that the SAFEST way to heat your RV is using the furnace. Electric is NEARLY as safe but still presents a fire hazard if something gets too close to the heater. Just use common sense and be careful with pets and children.
Good luck / Skip
