Thanks for the input guy's.
Here is more
info from Mud.
It is a good idea to use a filter if hooking it up to a bigger bottle.
I use to use a Coleman one in my last tent trailer I had when the kid's were much younger.
I would only turn it on in the cool mornings to heat it up in there to shave and to get dressed.
It was not the safe type that you can let run all night.
We always had warm sleeping bags and longjohns for cooler nights, but getting out of the bed in the mornings could be quite cool sometimes.