Stoves, fuel and cooking at altitude

The points below about camping stoves are ordered by how much difference they make, not by how often they get repeated.

Gas is easy until it is cold

Canister stoves are light, simple and instantly controllable, and are the right answer for most three-season use. As temperature falls, the gas mixture loses vapour pressure and output drops, with the butane component failing first.

Inverted-canister stoves with a preheat tube run liquid feed and largely solve this, at some complexity. The mix inside the canister decides the cold limit, since propane and isobutane keep vaporising at temperatures where plain butane has given up, and that composition is printed on the canister for anybody who thinks to look at it.

Liquid fuel works cold and needs attention

Pressurised liquid fuel stoves perform reliably in deep cold and at altitude and burn fuel available almost anywhere. They require priming, occasional cleaning and a spare parts kit, and they are heavier.

For expedition use in winter they remain the standard for good reason. Fuel quality is the recurring problem rather than the design, because locally bought petrol and paraffin carry impurities that block a jet, which is why these stoves ship with cleaning needles and why filtering fuel through cloth is routine on long trips.

Altitude changes the cooking, not just the boiling

Water boils at progressively lower temperatures as altitude increases, so food cooks more slowly even at a rolling boil. Rehydrating dried food takes noticeably longer high up, and pasta and rice can be genuinely tedious.

Planning meals that need soaking rather than boiling addresses this better than more fuel does. Wind does more damage to fuel consumption than altitude, since an unshielded burner loses most of its heat sideways, and a windshield or a sheltered pitch saves more gas than the difference between any two stoves on the market.

Fuel estimation

Fuel use is dominated by how much water you boil, which is dominated by melting snow if that is the water source. Melting snow uses several times the fuel of heating the same volume of liquid water.

Over a season, winter trips that assume summer fuel consumption run out, and that is the most common serious planning error. Pot choice matters at a similar scale, because a lid cuts boil time dramatically and a heat-exchanger base traps heat that would otherwise stream past the sides, so the same canister does noticeably more work.

Safety is not optional

Cooking inside a tent risks carbon monoxide, which is odourless and has killed people in enclosed porches. Ventilation is essential, and stability matters — a spilled pan of boiling water in a tent is a serious burn.

Canisters should be kept warm rather than heated, and never insulated directly over a flame. Refuelling is the other flashpoint, since a liquid fuel stove has to be cold before its bottle is opened and a priming flame flares far higher than people expect, which is why both jobs belong outside, away from the tent and away from the fuel.

The exception is usually weather, which overrides most planning.

You cannot take the fuel with you

No airline carries gas canisters or liquid fuel in hold or cabin baggage, so any trip involving a flight means buying fuel at the far end and building the itinerary around where that is actually possible. Canister fittings are not universal either: the threaded valve familiar across Europe and North America is not stocked everywhere, and in some regions the pierceable cartridge remains standard, which makes the stove rather than the fuel the wrong thing to have brought. A liquid fuel stove running on petrol or paraffin sidesteps that entirely in places where canisters are simply not sold, which is much of the world away from established trekking routes.

In practice, part-used canisters cannot be flown home and are awkward to dispose of responsibly, so the practical habit is to buy the smallest size that covers the trip and hand what is left to somebody just arriving.

Everything above, in order of what to do first

1. Gas is easy until it is cold. Canister stoves are light, simple and instantly controllable, and are the right answer for most three-season use.
2. Liquid fuel works cold and needs attention. Pressurised liquid fuel stoves perform reliably in deep cold and at altitude and burn fuel available almost anywhere.
3. Altitude changes the cooking, not just the boiling. Water boils at progressively lower temperatures as altitude increases, so food cooks more slowly even at a rolling boil.
4. Fuel estimation. Fuel use is dominated by how much water you boil, which is dominated by melting snow if that is the water source.
5. Safety is not optional. Cooking inside a tent risks carbon monoxide, which is odourless and has killed people in enclosed porches.
6. You cannot take the fuel with you. No airline carries gas canisters or liquid fuel in hold or cabin baggage, so any trip involving a flight means buying fuel at the far end and building the itinerary around where that is actually possible.

The takeaway

Match the stove to the temperature, and budget fuel by water boiled rather than by nights out.

The route rewards patience more than equipment.