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The Jetboil Joule cooking system is a liquid-feed canister, high-volume cooking system.

Liquid feed canister systems take advantage of the canister in an inverted configuration to deliver liquid fuel to the burner, in contrast to upright canister systems, which deliver fuel as vaporized gas to the burner.

The primary advantage of a liquid feed canister system is that it offers better cold weather performance, since the vapor pressure in the canister isn't changing while the stove is operating.

In upright canister systems, as the vapor pressure in the canister decreases, the canister temperature decreases, and the rate of fuel delivery to the burner decreases.

Thus, upright canister systems don't work so well in the cold, or for boiling large volumes of water at cooler ambient temperatures.

The Jetboil Joule attempts to solve this problem not only by inverting the canister, but also by preheating the liquid fuel before it hits the burner, which allows it to maintain power in cold temperatures.

In addition to the inverted canister configuration and the preheated liquid fuel delivery tube, the Jetboil Joule pot has an integrated heat exchanger, which allows for more efficient heating of the pot, and greater fuel efficiency.

The other unique feature of the Jetboil Joule is that it's an integrated system that consists only of two parts - the stove base and the pot - which connect to each other to make one solid unit during operation.

There are no separate parts such as windscreens, fuel pumps, or external heat exchangers, and the entire stove unit - with an attached fuel canister, nests neatly into the pot for space efficient storage.


  • Overview
  • Features & Specifications
    • Table 1. System Specifications (Comparison of Jetboil Joule & MSR Reactor 2.5L System)
  • Using the Stove
  • Baseline Fuel Efficiency
    • Table 2. Baseline Comparison of the Jetboil Joule and MSR Reactor: Boil Time & Fuel Efficiency
  • Observations
  • Preliminary Assessment

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