BUTANE 
For residential properties, you can store up to 30kg of butane (2 x 15kg gas bottles) indoors, for use in portable gas heaters for example. 
7kg Butane Gas Bottle
Ideal for small indoor portable heaters.
Clip-on 21mm regulator.
15kg Butane Gas Bottle
Ideal for indoor portable heaters.
Clip-on 21mm regulator.
Calor Gas is the UK's leading LPG supplier. They offer a range of off grid energy options for heating, cooking and other needs, to homes and businesses.  We stock Calor's bottled butane and propane which comes in cylinders and have a special gas regulator.
It’s important that empty and unwanted gas bottles are returned to us so they can be recycled and reused.
If you smell gas, or if there is an emergency, Immediately shut off all valves on bottles and call the Calor Emergency Line on 03457 444 999 for further instructions