Not sure what the law is regarding using gas bottles for your hob. In France, my g/f's folks use a 20kg Calor bottle under the hob because there's no mains gas there. I *think* the jetting is different to mains gas.
As RobRX-7 mentioned, I also think you have to store butane (blue bottle) indoors and propane (orange bottle) outdoors. Different boiling points and hence more suited to being in or out.
As RobRX-7 mentioned, I also think you have to store butane (blue bottle) indoors and propane (orange bottle) outdoors. Different boiling points and hence more suited to being in or out.