Originally Posted by Polwart
13kg propane cylinder should cost about £24 including a £10 deposit for the cylinder. (i.e. net cost £14)
As codders said don't try to use butane instead at this time of year - it is useless below about 5 deg C as it starts to freeze around 0 C. Propane will continue working down to at least -30 deg C.
As for Carbon Monoxide poisoning - its less of an issue with the heater you were originally planning to use than the space heaters. As the heater you were planning to use is catalytic it doesn't produce CO (unless it is faulty).
Actually a catalytic heater DOES produce CO - not as much as a an open flame but more than enough to kill you!!! It doesn't produce CO when there is sufficient oxygen but if there isn't look out!!!
The danger with the catalytic type is they lull you into a false sense of security - a space heater will chuck out so many fumes you will open a window or a door before much harm is done.
There have been loads of instances of people dying in tents etc from catalytic heaters and lanterns etc.
Luckily I am allergic to the fumes these gas things give off so I am gagging for air long before anyone else!!!