Primus Winter Gas 450 g

Gas that works down to -22 ° C
Everybody who has used a gas cartridge stove in cold conditions knows this: the lower the temperature, the poorer the performance of the stove. In cold conditions the cartridge pressure decreases under use making the stove run with less power or not at all. Even though the cartridge might have fuel left in it! Why? Liquefied gas doesn’t evaporate properly the colder it gets.

How does it work?
The main innovation behind Primus Winter Gas ™ cold weather performance is the Vapour Mesh™ a highly absorbent paper inside the cartridge that will keep the pressure higher making the stove run better. The VaporMesh increases the surface on which the liquid fuel can evaporate into gas state. The increased surface makes the change from Liquid to gas faster and the speed of this process is what determines the pressure inside the cartridge. Compared to conventional cartridges this makes it work in conditions when it was previously hard to use gas fuels.

In comparison
When comparing two totally new, full cartridges (one of Power Gas and one Winter gas) the difference is not very notable since the pressure is high in both but as the fuel inside the cartridge is consumed the difference becomes more and more evident. With “normal” cartridges in cold conditions the canister pressure decreases under use, making the stove run with less power or not at all. This is obvious when using a cartridge that is not full. After using a cartridge for 60 minutes of cooking, a Winter Gas cartridge is approximately 9 % more powerful than one without VaporMesh. After 120 minutes of use it delivers about 15 % more power.