Propane
Propane, as an LPG, is most suitable for exterior storage and use.
Its ability to operate in low temperatures makes it the most suitable LPG for many applications.
Propane is widely used as a fuel source for domestic and commercial heating, hot water, and cooking. It also has a wide range of uses in industry and agriculture.
Propane has a lower boiling point than butane so it will continue to convert from a liquid to gas even in very cold conditions, down to -45ºC. When stored as a liquid in a tank, it exerts greater pressure than Butane at the same temperature.