Propane Gas,I presume is what is in used normally for fuel forcooking and heating in caravans,both safe if used properly andremember these people are well used to changing and using these gas cylinders and the gas therein,the appliances,hobs, ovens etc.Will have safety devices and flame failure devices fitted as normal.It is not illegal to use for this purpose in any caravan on the public highway,think of Hot dog vans at fairgrounds etc.
Dr John Stolworthy D.Sc ● 3581d