fokion wrote:An other winter question. Should I do something with my gas bottle? It will be used mainly for heeting the van at the weekends. Its located in the boot. Should I cover it with some sort of blanket?
As beejay indicates,
NO
Heat from the environment needs to get
into the 'gas' bottle to help vapourize the gas from the liquid phase. Covering the gas bottles actually reduces this vapourization; not a good idea!
With propane gas you'll probably never notice it, but with butane at cold temperatures, you certainly will.
Here's a photo of a propane cylinder (French Twiny)

in which the evaporating propane (for the water heater and blown air heating) has cooled the liquid propane and the cylinder, to such an extent that frost (i.e < 0°C) has formed on the outside of the cylinder, to the level where the liquid propane is.