With the tank filled (approx. 0.75 liters), the 2480 will run continuously for 4 to 6 hours on a low simmer or 2 to 3 hours at full roar.
Often referred to as the "Civil Defense" or "Total Defense" stove, the 2480 is a brute-force piece of engineering that has become a cult favorite among preppers, vintage camping enthusiasts, and off-grid survivalists. The Primus 2480 was manufactured during the height of the Cold War (primarily the 1950s and 60s). Unlike the standard Primus 71 or 96 models designed for hikers, the 2480 was specifically commissioned or heavily marketed for Swedish Civil Defense (Totalförsvaret) stockpiles. primus 2480
The design brief was simple: It must never fail. It must run on any volatile liquid. And it must heat a shelter or cook a meal in sub-zero temperatures without moving parts. With the tank filled (approx