PRIMUS, a long-established stove manufacturer in Scandinavian Sweden with a history of over 130 years, has a lineup of many gas stoves. However, in reality, stoves do not allow you to distinguish between these differences from stores or catalogs alone, and determine the model that is right for you. This applies to all mountain tools, but it can only be seen when you try using it under various conditions in the field.
So this time, we compared three models developed for mountain climbing and hiking from the Primus gas stoves in the field under various conditions, and examined which ones are most useful, what differences each has, and what uses are suitable for.
Compare the P-157 Integ Stove , P-153 Ultra Burner , and P-116 Femto Stove II . After testing in the field, the specs clearly revealed a personality that was hard to tell, resulting in unexpected results. I hope this will help you choose the best stove for your needs.
table of contents
- This time we compared PRIMUS single burner 3 models for mountain climbing
- Comparison of main specs and test results
- Field tests and comparisons in environments with different conditions
- Burning power test (time until 300ml of water boils in air temperature about 20°C and 300ml of water is boiled)
- Wind resistance test (time until 300ml of water boils in an environment with temperatures of about 0°C, wind speeds of about 3-5m, and altitude of about 2,500m)
- Cold resistance test (time until 300ml of water boils in an environment with temperatures of approximately -3°C, wind speeds of approximately 1-3m, and altitude of approximately 1,100m)
- Combustion efficiency test (comparing consumption based on weight difference before and after use)
- Check the difference in boiling time depending on the size of the cooker used (lower area size)
- Weight, storage size and usability comparison
- Conclusion and Summary: If you want to choose a bottle that you can use safely regardless of the conditions throughout the year, use the Integ Stove. Femto Stove II only available for snowless season and solos
This time we compared PRIMUS single burner 3 models for mountain climbing
The P-157 Integ Stove is a high-performance single burner that uses a newly designed valve equipped with a regulator mechanism. The mortar-shaped burner head creates an inwardly tilted flame, and efficiently transmits the heat energy of the flame to the cooker, providing high wind resistance and stable combustion in any environment.
P-153 Ultra Burner delivers overwhelming power of 3600kcal/h . This model is highly stable, highly powered, compact, and lightweight, making it a great choice for cooking from hiking to mountain climbing.
The lightest single burner in Primus' gas stove lineup is the P-116 Femto Stove II . This compact stove combines practicality and wind resistance that you wouldn't imagine from its small body, and is a balanced portability and practicality.
Comparison of main specs and test results
Before we provide details about the test results, for those who want to get a rough idea of the conclusion, we have compiled a comparison table of catalog specifications and test results below.
Regarding evaluation items, six indicators were set as follows and rated with 5 stars. This evaluation will not be based on published specifications, but will be its own evaluation after testing in the field.
- Combustion power: fast boiling speed at room temperature without wind
- Wind resistance: Fast boiling speed in windy conditions
- Combustion efficiency: Measures the amount of gas consumed to boil a certain amount of water at room temperature and airless.
- Low temperature resistance: Fast boiling speed in low temperature environments
- Portability: Compare weight and compactness
- Usability: Easy to cook and use, with a variety of complex uses, including the versatility of gut and the ability to adjust the heat.
| P-157 Integrated Stove | P-153 Ultra Burner | P-116 Femto Stove II | |
|---|---|---|---|
| type | Direct connection type | ||
| Output (kcal/h) | 3.3kW / 2,840kcal/h (when using IP-250T) | 4.2kW/3,600kcal/h (when using T-type gas) | 2.5kW / 2,100kcal/h (when using T gas) |
| Gas consumption (g/h) | 220g/h | 245g/h | 170g/h |
| Burning time | Approximately 62 minutes | Approximately 55 minutes | Approximately 80 minutes |
| Weight (g) | 100g | 116g | 64g |
| Gotoku size (Φ mm) | 148mm | Large 148mm/Small 90mm | Large 120mm / Small 80mm |
| Storage size | 7.3 x 10.1 x 4.7cm | 7.5 x 8.8 x 3.0 cm | 5.4 x 7.4 x 2.7cm |
| Ignition device | can be | can be | can be |
| 300ml boiling thyme (actual measurement) | 75 seconds | 106 seconds | 132 seconds |
| Reference price (tax included) | ￥9,900 | ￥8,800 | ￥8,800 |
| Outdoor Gearzine Review | |||
| Burning power | ★★★★★ | ★★★★☆ | ★★★☆☆ |
| Wind resistant | ★★★★★ | ★★☆☆☆ | ★★★★☆ |
| Combustion efficiency | ★★★★☆ | ★★★★☆ | ★★★★★ |
| Low temperature resistance | ★★★★★ | ★★★☆☆ | ★★★☆☆ |
| Portability | ★★★☆☆ | ★★★★☆ | ★★★★★ |
| Easy to use | ★★★★☆ | ★★★★★ | ★★★★☆ |
Each one's favorite points and what I was interested in
| item | P-157 Integrated Stove | P-153 Ultra Burner | P-116 Femto Stove II |
|---|---|---|---|
| Favorite points |
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| What I was interested in |
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Field tests and comparisons in environments with different conditions
In comparing the three gas stoves, in addition to field testing, we also tested combustion efficiency.
In the field test, we conducted three tests with different environments and compared the following items.
- 1st time: Burning power test (time until 300ml of water boils in air temperature about 20°C and no wind)
- Second time: Wind resistance test (time until 300ml of water boils in an environment with temperatures of about 0°C, wind speeds of about 3-5m, and altitude of about 2,500m)
- 3rd time: Cold resistance test (time until 300ml of water boils in an environment with temperatures of about -3°C, wind speeds of about 1-3m, and altitude of about 1,100m)
The test was conducted after the burner was ignited, and the cooker was placed to the maximum heat, and the time it took for 300ml of water to fully boil. The reason for using 300ml is that when it is intended for use in mountainous areas, I think it is water necessary for one meal, such as alpha rice, freeze-dried soup, and other water that can be eaten by rehydration.
To prevent the gas cartridges from being continuously used, we used multiple cartridges and ignited them after a while to prevent them from being affected by air heating. We also hope that you will understand that the measurements were taken in order in a realistic natural environment, so the conditions are not exactly the same, and we will use them as a reference.
Burning power test (time until 300ml of water boils in air temperature about 20°C and 300ml of water is boiled)
| item | P-157 Integrated Stove | P-153 Ultra Burner | P-116 Femto Stove II |
|---|---|---|---|
| time | 75 seconds | 106 seconds | 132 seconds |
When tested with a temperature of about 20°C and no wind, I thought ultra burner the ultra burner the Integrated Stove the top spot, which held . 300ml of water was boiled in an astonishing 75 seconds (1 minute 15 seconds), and an ultra burner , it was far faster than that.
The integrated stove is designed to consolidate flames by using a mortar-shaped burner head, and it is believed that the consolidated flames were heated without waste when they hit the cooker to cover the low output, increasing the combustion power, and allowed water to boil in a short period of time.
On the other hand, the ultra burner Integ Stove in terms of heat transfer efficiency , and as a result, it took a little time. Integrated Stove the Femto Stove II , is a type that collects flames and is a highly efficient model, but the low output itself also affects the boiling time (although as expected).
Wind resistance test (time until 300ml of water boils in an environment with temperatures of about 0°C, wind speeds of about 3-5m, and altitude of about 2,500m)
| item | P-157 Integrated Stove | P-153 Ultra Burner | P-116 Femto Stove II |
|---|---|---|---|
| time | 84 seconds | 248 seconds | 193 seconds |
The second test was conducted at a temperature of about 0°C, wind speeds of about 3-5m, and an altitude of about 2,500m. The wind was constantly blowing, and I did the test with a slightly concerned condition to use the stove. The wind was strong, so it's perfect for checking wind resistance.
the integrus stove that boiled completely in 84 seconds . The difference from the first test was less than 10 seconds. It can be seen that even in poor environments, it conveys stable output to the cooker. Not only does it increase the burner head, it not only has to increase the burning power, but it also covers the area where the flame is emitted, protecting the area where the flame is emitted from the wind, minimizing the effects of wind.
This structure Femto Stove II , and as proof, it was able to boil water faster than an ultra burner. Ultra burners with bare burner heads are directly affected by wind, which significantly reduces the efficiency of combustion, taking more than twice as long as they were in windless state.
Even in poor wind resistance, not only can the water be boiled, but it also shortens the ignition time, which has a major impact on fuel economy. It's not a concern for a short period of time, such as a day trip or one night, but for long mountain hiking, you may have to increase the amount of gas you will bring, so this is a point to keep in mind just like combustion efficiency.
Cold resistance test (time until 300ml of water boils in an environment with temperatures of approximately -3°C, wind speeds of approximately 1-3m, and altitude of approximately 1,100m)
| item | P-157 Integrated Stove | P-153 Ultra Burner | P-116 Femto Stove II |
|---|---|---|---|
| time | 89 seconds | 129 seconds | 179 seconds |
The third test was conducted in a low temperature environment with a temperature of approximately -3°C, wind speeds of approximately 1-3m, and altitude of approximately 1,100m.
What is common to all stoves is that the lower the temperature, the more time it takes to boil water. the Integ Stove is one of the best . It can be heated in 89 seconds, and the difference from the first test is only 15 seconds.
Tested on snow, temperature -3°C
In low temperature environments, the gas inside the cartridge is less likely to vaporize, so the output will not drop. the Integrated Stove, which provide high performance even at low temperatures, are equipped with a regulator mechanism, and the springs that are properly adjusted to the pressure of the gas ejected when the valve is opened to move the diaphragm (rubber partition) inside the valve at the optimal position, allowing the internal O-ring to adjust the gas flow rate in real time, maintaining a constant output.
Image Quote: PRIMUS
This regulator mechanism is the factor that makes the big difference between the Ultra Burner and the Femto Stove II It is not clear from the appearance whether it is equipped with a regulator, but when you actually use it, the difference in performance is clear. If you are planning to use it in harsh environments, it is best to choose a model with a regulator mechanism.
Combustion efficiency test (comparing consumption based on weight difference before and after use)
The combustion efficiency (fuel economy) tested how much combustion is consumed to bring 300ml of water to a complete boil. We measure the weight of the gas cartridge before and after use and compare the differences.
| item | P-157 Integrated Stove | P-153 Ultra Burner | P-116 Femto Stove II |
|---|---|---|---|
| Weight difference | 6g | 7g | 5g |
The Femto Stove II the best fuel economy , and although it takes time to boil water due to the low output, it has good fuel efficiency and low gas consumption.
Although it's a close difference, the ultra burner had the worst fuel efficiency. High output is also an advantage, but good fuel efficiency can affect the fuel used for long-term use. Fuel efficiency is best when used on long-term traverses or long trails, so whether to prioritize combustion power or fuel efficiency will likely depend on the mountain climb you plan to do.
Check the difference in boiling time depending on the size of the cooker used (lower area size)
Measure the time it takes for 300 ml of water to boil using a cooker (kitchen) with a diameter of approximately 9.5cm, 12.5cm, and 14.5cm.
Using three cookers with different diameters (kinakan), the time until 300ml of water reaches full boiling
We have compared the combustion power, and we have also checked how the time it takes to boil depending on the cooker used.
Generally, it is expected that the larger the diameter of the cooker will expand the area where the flame hits, and the time it takes to boil will be shorter, but the Integrated Stove and Femto Stove II , have an effect? And what will the result of the ultra burner Using cookers of different sizes, we measured the time it took for 300ml of water to boil and compared them. Please consider this as a reference only as the cooker material and thickness are not the same.
| item | P-157 Integrated Stove | P-153 Ultra Burner | P-116 Femto Stove II |
|---|---|---|---|
| Diameter 9.5cm | 85 seconds | 117 seconds | 150 seconds |
| Diameter 12.5cm | 84 seconds | 106 seconds | 132 seconds |
| Diameter 14.5cm | 77 seconds | 85 seconds | 100 seconds |
All stoves have grown cookers and reduced time. Among them, the ultra burner has a marked figure. In the test with the largest cooker, I was able to boil it completely in 85 seconds.
The Integ stove was not affected by the size of the cooker . Although the time was shortened in the 14.5cm Cooker test, the error was within 10 seconds, resulting in excellent results. Despite the significant differences between the other two stoves, the the integral stove was not affected was that the flame accumulation due to the burner head's grinding shape can deliver high performance regardless of the size of the cooker.
When we checked the flames of the Integrated Stove and Femto Stove II we found that the burner head was designed to be firmly cone-shaped for the Integrated the Femto Stove II is not strictly cone-shaped, but rather a single-point flame, so we could visually confirm that there was some waste when the flame hits the cooker.
This difference is less likely to be influenced by the size of the cooker, and is probably the reason why it can be heated steadily.
Ultra burners can be expected to improve performance by using a larger cooker, but if you are using them solo, you will have to choose a compact cooker, so combining them with a cooker will likely cause trouble.
Weight, storage size and usability comparison
The Integrated Stove is the second-largest weight, but the burner head is large, so it is by no means compact and has the largest storage size. This large burner head also has a wider gutter, so it's fine for a cooker with a bottom area that is larger than normal, but small mugs can only be folded and placed on barely any place. This has the disadvantage of being slippery and difficult to use.
The lightest is the Femto Stove II , weighing 64g and 36g lighter than the Integrated Stove The size fits in the palm of your hand, allowing you to insert all the tools you need for cooking into the cooker. From a portability perspective, the Femto Stove II the best. When climbing mountains during the snowy season (staying in a tent), I want to have the gas cartridge and lighter fit in a 650ml cooker and the stove itself are large, so femto is the only option for this.
Finally, the ultra burner is slightly heavier of the three, but in terms of storage size, it is thinner and smaller than the Integ stove, so its storage capacity is not as bad as Integ The stove is also non-slip and stable with 4 bottles, and can be used in a wide range of ways, from small cups to large pots. Furthermore, it can be used in a wide range of heat, from low to high, and the heat spreads well, making it easy to cook in a variety of ways, from hot pots to cooking in a frying pan, making it better than the other two.
Conclusion and Summary: If you want to choose a bottle that you can use safely regardless of the conditions throughout the year, use the Integ Stove. Femto Stove II only available for snowless season and solos
I will summarize my own conclusions as a result of the comparison verification.
If you want to choose one bottle that can be used all year round, including snowy mountains, you can choose Integ Stove
The Integrated Stove offers excellent performance in terms of combustion, wind resistance and cold resistance, making it the perfect gas stove for a variety of activities throughout the year, such as harsh winters and strong winds. In a test at the Hirashibeyama I went to a previous test, I was able to easily boil water even in strong winds that were too strong to stand up, and it's a real thing.
The integrated stove with a regulator keeps the output constant regardless of the environment, making it less likely that a "drop-down phenomenon" caused by continuous use is also less likely to occur, minimizing the deterioration in performance (the drop-down phenomenon is that the gas cartridge itself gets cooled due to air heating when it is used continuously, making it difficult for the fuel inside the cartridge to be vaporized, resulting in a decrease in heat). If you are planning to use it in mountain hiking during the harsh winter or in harsh environments, the Integrated Stove is a stove that we can confidently recommend.
Related Articles
Femto Stove II only available for snowless season and solos
Femto Stove II the best balance between portability and performance .
When hiking mountain climbing where you carry all your food and clothing, it is a must to reduce your equipment weight. Not only is it lightweight, but it's also important to note how compact it is. The Integrated Stove is an excellent stove that delivers high performance even in harsh environments, and although it weighs only 100g, it is not heavy, but the larger burner head is not compact in comparison. Femto Stove II has a slightly inferior combustion power, it also has wind resistance and is excellent in terms of balance between portability and performance.
Femto Stove II is recommended for UL-oriented hikers that use water-removing meals in the mountains as a basis for cooking or for fast packing
the Ultra Burner was not very useful in this test , but because it has a quirky, high power that can accommodate large pots, it can be used for a wide range of heat controls from thori to high heat, and the flame that spreads horizontally heats the cooker evenly, making it extremely easy to cook and bake and stir-fry.
Femto Stove II , can efficiently heat the cooker, but temperature differences occur on the bottom of the cooker making it unsuitable to cook or stir-fry. When I used a former femto stove and baked the wiener, the frying pan was not evenly heated and it burned. Cook on the summit you reach and enjoy a luxurious mountain meal. Ultra burner is recommended for those who want to enjoy this kind of thing.
Eating food in the great outdoors is one of the fun things about it. After walking, at the end of the day, you can quickly and simply cook it in the hot water, or enjoy a luxurious meal with ingredients you've worked hard to carry and enjoy a gorgeous meal, or enjoy a delicious mountain meal with the best gas stove that suits your needs!
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Yosuke.C
From spring to autumn, I chase after char deep in the mountains and go fishing in the mountain stream. We walked the mountains in search of spectacular views that cannot be seen from the ground. Camping to be healed by the bonfire. Snowboarding is a floating mountain with a mountain of silver.
A freelance writer who enjoys outdoor activities all year round. I share my own experiences and tools that I've been using.