or stove in -20 -> -10 Celsius... At last i was trying PT-1 in -12 ... Starting was dificult - works with less then half power... If adds extra heat losts for mug - effectiveness is poor. What constructions - and what fuel - are the best to work in these temperatures? What are the practical ways to reduce the effect of low temperatures on the pressure in the tank? Is a large tank and efficient pump with a pressure gauge is the only solution problem?