I'm still looking into what I might use on the counter as a heater that won't bake me out and might be a tad safer than my 40 some year old gravity furnace. It still works ok and check out ok but.... let us just say while I don't mind dying peacefully in my sleep I'm not in a rush to do so. Wife would never forgive me if it caused the dog harm either so if I don't want to be buried in a shoe box in a land fill....
I would think even a 3,000 btu heater would be more than adequate. I would guess a candle could as it can in a car add about 10* F to the ambient temperature. Although there is probably more air space in a 13 ft. camper so not exactly sure. If it is 40* F outside and 50* F inside that should be sufficient for my needs.
Dog does complicate things in that I wouldn't want anything down on the floor where the dog could knock into it. Not a lot of floor space and it would be too easy for an accident so it has to sit on the counter or in the sink and not overheat the overhead cabinets. I imagine even a small propane
lantern on really low should be good for a night even in pretty cool weather.
I saw a small maybe 5# propane
tank at recent rally
, I could see something like that with an infrared attached might be stable enough for setting on the floor and leaving on all night. Should provide several nights of heat. One of those can heat an ice shanty so camper should be no problem.
Frankly the furnace in the old Scamp
is like the fridge
. It is there, it should work but not really going to use it because it just isn't practical or an especially great solution for most use cases.