Trangia Stove 25-3 UL Review

Overview

The Trangia 25-3 UL is Trangia’s larger stove, designed for 3–4 people, and every set includes two saucepans (1.75 L and 1.5 L), a frying pan, upper and lower windshield sections, a spirit burner, a handle, and a strap.

The “-3” in the model name specifically means that frying pan has a non-stick coating rather than bare aluminum.

The UL construction uses ultralight aluminium that is 50% stronger than ordinary aluminium, resulting in cooksets that are approximately 18% lighter than the regular aluminum 25 series.

This is a system built for people who want to actually cook on the trail — not just pour boiling water into a freeze-dried pouch.

Key Specs

Spec	Value
Weight	895 g (31.6 oz)
Packed Size	22 × 10.5 cm
Capacity	3–4 persons
Burner Type	Spirit (alcohol)
Output	1,000 W
Boil Time (1 L)	~8 min
Saucepans	1.75 L + 1.5 L
Frying Pan	22 cm (non-stick)
Material	Ultralight aluminium
Comparison	See how Trangia Stove 25-3 UL compares to similar gear

Performance

Setup and stability

All the parts pack down into a nested set consisting of a stand, a windshield, two pots, and a frying pan.

The stove and all its accessories pack together like nesting dolls.

Setup is genuinely fast — flip open the lower windshield, drop in the burner, set the upper section with its pot supports, fill the burner roughly half-way, and light it.

When set up, the wide base is very stable and can sit on a variety of surfaces without becoming tippy, and even novice users can rely on the set taking a lot of bumps and jostles while remaining upright.

Boil times and output

Rated at 1,000 W and around 8 minutes to boil 1 liter, the Trangia is not going to impress anyone coming from a modern canister stove. That’s a meaningful gap — many canister setups halve that figure. The 8-minute number is also a best-case scenario: expect it to stretch closer to 10–12 minutes in cool ambient temperatures or at altitude. If you’re feeding three or four people and cooking actual food across two pots, the slower pace becomes the rhythm of camp life rather than a frustration.

A useful trick worth knowing: the stove can cook very slowly if the burner is overfilled — don’t fill it to the top; it burns better when about half full, with the flame coming from the small holes around the edge rather than the large central hole.

Wind resistance

The integrated two-part windshield is where the Trangia system earns genuine respect. Some of the most experienced backpackers swear by these cooksets as they work in horrendous weather conditions, maximize the limited fuel efficiency of the Trangia stove, run silently, and avoid the mess and hassle of setting up and putting away liquid fuel stoves. That said, the windshield is not invincible. With any alcohol stove, the windscreen system must be sorted — these stoves are not pressurized, so the flames are very susceptible to being blown about. Real-world user experience bears this out: one reviewer who brought the 25-3 UL on a three-week trip in Norway reported that on a particularly gusty day, even with the frying pan used as a lid, the 1 L of water for their soup wouldn’t come to a boil until they moved to the lee side of their vehicle.

Cold weather

Alcohol performance is technically reduced in colder weather, and while that’s true of this unit as well, it stands up to cold much better than the Trangia alcohol stove without a windscreen set.

In fact, it stands up to cold better than LPG gas canister stoves. In temperatures well below freezing, a small heating plate under the burner helps improve efficiency.

For truly extreme cold — think multi-day winter camping well below -10°C — switching to Trangia’s optional gas burner insert is the wiser call.

Fuel and cookability

Denatured alcohol (methylated spirits) is attractive for a number of reasons: it doesn’t freeze, it’s widely accessible, and depending on purity, it burns clean. That global availability makes this system genuinely useful for international travel where isobutane canisters can be impossible to source. On the flip side, one of the biggest challenges with Trangia stoves is maximizing heat efficiency — alcohol has one of the lowest fuel weight-to-heat ratios of all fuels, which means every bit of heat efficiency matters. For a week-long group trip, fuel weight adds up fast.

Where the 25-3 UL earns its keep is real cooking. The stove comes with an adjustable simmering ring that, with some practice, allows you to cook or fry things at lower temperatures. That’s not something you can say about most titanium-pot-and-canister setups.

The non-stick frying pan

The “-3” model’s non-stick frying pan is handy for eggs and pancakes in theory, but users note the pan looks non-stick but doesn’t perform like a proper home Teflon pan. It’s functional for camp cooking, but treat it as “easier to clean than bare aluminum” rather than “nothing will stick.”

Extinguishing the burner

One genuinely awkward aspect of the system: to extinguish the flame, you slide the simmer ring closed over the burner. This can feel similar to playing ring toss, and the surfaces of the kit get hot, so gloves are useful when reaching down to nudge the ring onto the flame or pick up the hot simmer ring and try again. It becomes second nature with practice, but new users should expect a learning moment.

Pros & Cons

Pros

• Complete, self-contained system — stove, windshield, two pots, and frying pan all nest into one compact unit

• Incredibly durable and capable of working in all weather conditions

• Wide, stable base — nearly impossible to tip on uneven ground
• Integrated windshield performs well in moderate wind; better cold-weather performance than LPG canister stoves
• Silent operation — the quietest stove system many experienced users have tried
• Fuel (denatured alcohol) is globally available, affordable, and non-toxic if spilled
• Can swap to optional gas burner insert for faster boil or deep-winter use
• UL aluminium is meaningfully lighter and stronger than old-generation Trangia sets

Cons

• At 895 g, it’s heavy for a backpacking stove — this is a group cooking system, not a lightweight thru-hiker setup
• Slow boil times (~8 min/L in ideal conditions) vs. modern canister stoves
• Alcohol carries lower energy density than canister gas; fuel weight grows on longer trips
• Non-stick frying pan underperforms compared to home cookware
• Extinguishing the burner via the simmer ring takes practice and requires care around hot surfaces

• The alcohol flame burns very clear, and it is quite possible to have the stove lit without being immediately aware of it

  — a genuine safety note for new users
• Bulky footprint (22 cm diameter) takes up real pack space

Who Should Buy This

The 25-3 UL is the right call for larger parties of 3–4 people, group leaders, or those sharing weight on multi-person trips. It suits family campers, scout leaders, Duke of Edinburgh groups, and anyone who actually wants to fry an egg or simmer a sauce rather than just rehydrate a pouch. If you do a lot of international travel for your backpacking and camping trips and are in the market for a stove that is compatible with widely available fuel sources, the Trangia system is right up your alley. Solo ultralight thru-hikers focused on base weight should look at the smaller 27 series or a dedicated minimalist alcohol setup — UL backpackers should look elsewhere.

Verdict

The Trangia 25-3 UL is a 70-year-old design that earns its continued existence through genuine reliability, exceptional stability, and a completeness that most modern stove systems can’t match out of the box. The trade-offs are real: 895 g is a lot to carry, the 8-minute boil time will frustrate anyone used to canister speed, and the non-stick pan is only modestly better than bare aluminum. But for a group that wants to cook real food, travel internationally, or simply have one durable system that they’ll use for decades without worrying about O-rings and fuel line maintenance, this remains one of the most sensible purchases in camping gear. 7.5/10.