Re: Butane Vs. Propane
standard calor gas is butane, the orange cylinders are propane camping gaz is also butane, but much more expensive than normal calor. You can buy a connector from a caravan shop, which allows you to connect a proper calor gas regulator to the top of a camping gas bottle.
The only reason for changing to propane (which works at a slightly different pressure and MAY need a different regulator) is if you are boating in cold weather, as propane has a lower freeze point.
Some of the gasflow regulators will cope with both propane and butane
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