Which gas

Which gas best suits you will depend on how many appliances you have, their gas requirements and the temperature. Propane gas is better at supplying a larger number of appliances at the same time due to its greater off-take rate (see right), and it can be used in sub-zero temperatures, whereas butane begins to produce less gas below about 4C.

Now that the price of the two gases is very similar there’s little advantage to buying butane, though you do get marginally more energy from a butane cylinder than a propane one of the same volume and if you are a warm-weather caravanner butane will be fine.