Hexon Edelrid Multifuel Stove

by Christian

A couple of weeks ago I purchased the Hexon stove from Edelrid. It’s a powerful little stove that can use gas, gasoline or kerosene. It folds up small and weighs about 220g. With the separately available Tradapter the Hexon is easily fitted into the Trangia stove system. This makes the Hexon a very versatile option. While camping with my partner we generally prefer using a gas stove and for real cooking the Trangia is usually our first choice since weight and pack size don’t matter so much. With the Hexon I especially like that we are not dependent on gas only. Sometimes you can’t find the right screw top canisters, so being able to use normal gasoline as well is very convenient.

Of course, this feature makes this little bugger also a viable choice for winter. Using the Hexon with gasoline is not much different then say, firing up a MSR WhisperLite. But the Hexon has a nice little feature called preheating tube. With this tube you can also run the stove in liquid gas mode using your normal gas canisters and hereby lower the operating temperatures into ranges that normally are only possible with gasoline, kerosine, etc.

To describe what happens in these circumstances is a little bit technical but you can read a fair bit about on Roger Caffin’s resources and on Backpacking Light – Selecting a stove for cold weather (BPL membership required).

Basically, though, below 0 C normal gas canisters don’t operate well anymore because the gas inside the canisters is below its boiling point. This means there won’t be enough pressure left inside the canister and although you can feel the gas inside sloshing around, it will not come out.

What you can now do with a stove like the Hexon which has a preheating tube, is, you flip the canister around and feed the stove liquid gas. Now, be sure to this only after priming the preheating tube for a sufficient amount of time. Only then will the liquid gas evaporate in the tube and burn off safely. If the preheating tube is not properly primed before you can experience high balls of flames once you invert the canister (similar to the priming of a white gas stove).

I went out today to test this arrangement to get some data points and see how it would fare. It was not especially cold today, about -3 degrees celsius. Still, this meant it was cold enough that the stove had a hard time to get my 0,5 liter of water to a boil. The flame was to weak and I aborted after about 11 minutes. The water was hot to the touch but I am not convinced it would have come to a boil even I had waited longer.

After this first attempt the canister had cooled down so much, that I couldn’t light anymore for the second attempt. But this is not unusual when you using gas stoves in these temperatures. I then I put a little bit of luke warm water in my pan and settled the canister inside. This warmed up the canister enough that I was easily able to light the Hexon up again. After 30 seconds I inverted the canister and proceeded with my second test run. This time after about 8 minutes the water was boiling.

Data of my tests:

1) Gas canister in upright position
time: after 11 minutes I aborted; water not boiling
fuel: 13g

2) Inverted liquid feed mode
time: 8 minutes
fuel: 19g

3) Gas canister in upright position indoors
time: 7 min 30 seconds
fuel: 11g

Fuel: Primus Power Gas 4 Seasons Mix

I didn’t use a windscreen during my testing outside, so maybe that did affect fuel usage and boil times. For me, though, these test show that for temperatures down to negative single digits this is a viable alternative.

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