What about a small space heater, runs on 12v and gas. Think you can hire them from local hss shops or similar. We have just bought a small portable fan heater for going away next weekend.
I have just found what is needed in a Propex or Truma air heater but at £550-£600 I doubt we will be getting one!
Normally we would get EHU but there were none left at the last site and we thought we would risk it, it was too cold unfortunately so we came home early.
Space heaters are not usually room sealed I.e. the combustion gases are vented into the room, this would not be good in a small areal, thanks anyway.
We use a small Calor type heater,with a catalytic element. Great when it's really cold. Got it from flogas. It's a superser model,and from flogas,it came with full bottle cheaper than anywhere else without one.
WE have just had a week away in north Devon, the nights were very cold but we were snug and warm using heated mattress toppers from Argos, they were made by slumber land and worked extremely well.
John
have you tried caravan breakers?for a used one.my old conway came with a built in gas heater,it sits in the floor.by the way you can get 12v heated blankets.not sure how much power they use. some here
We have a 12v "electric Blanket". It is supposed to be used from a cigar lighter type socket when the engine is running, to keep you warm when stuck in cold weather. We certainly would not use it just from a battery.
I believe the Dandy also had the heater in the floor. Perhaps the Dandy Owners Club would be a source of information.
The one thing that would make me wary of with fitting a through floor heater into an FC, would be the amount of cross chassis members. I think there would be a limited amount of floor space where such a heater could be installed.
We have a member on our forum that has a floor heater for sale,does not require any electric and is sealed so safe to leave on,needs a hole in the floor about 11 inches by 15 inches,if you are interested look in my profile click home page,it came out of a dandy but only because he wants a propex.
------------- they said it couldnt be done so i left it and went camping
a bad days camping is better than a good day at work