About Us

Prüfengel offers authentic consumer tests in which real users share their experiences with products. Our tests are based on practical applications in everyday life and reflect the opinions of consumers. As we focus on consumer tests, we do not carry out material, long-term or laboratory tests. Our aim is to provide honest feedback to help you make a purchasing decision. For a detailed insight into our comprehensive evaluation process, which forms the basis of all our product reviews, please click here.

Stilform
Sauna Heater

The Stilform sauna heater fulfils all the essential test criteria and impresses with its robust, stable construction and very good workmanship. The visual design of the heater is neutral and appealing, while the controller supplied is functional but less modern in comparison. However, a digital version can be selected for a more aesthetic control. The packaging of the stove shows sustainability aspects. There is no unnecessary packaging waste, although the plastic film could be replaced with more environmentally friendly alternatives. In terms of heat output, the oven delivers a reliable temperature that corresponds to the manufacturer’s specifications and the temperature control is extremely precise. All cable connections and plugs are in perfect condition and free from damage and there was no excessive heat build-up during the test. The user interface of the controller is intuitive to use and responds immediately to inputs, which optimises the user experience. In addition, various sauna stones were tested and found to be fully compatible with the heater under all conditions. As only high-quality materials were used, the heater shows potential for longevity, even if no specific sustainability certificates are available. Overall, the testing institute confirms the high quality and user-friendliness of the Stilform sauna heater in all tested aspects.

  • Different variants available
  • Easy to connect
  • Very accurate temperature sensor

  • Digital controller with an old-fashioned look

The first impression

Packaging and contents

Here we take a closer look at packaging. Sustainability is becoming an increasingly important factor. In addition, adequate protection of the product must of course also be guaranteed. Are the contents of the packaging complete and does the manufacturer make it as easy as possible for me to use the product straight away?

Here we take a closer look at packaging. Sustainability is becoming an increasingly important factor. In addition, adequate protection of the product must of course also be guaranteed. Are the contents of the packaging complete and does the manufacturer make it as easy as possible for me to use the product straight away?

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Product protection

Carton is sturdy, product sufficiently protected

100

Points

Sustainability Packaging

Unnecessary packaging waste has been avoided and the plastic film protects the product components. It would be desirable to switch to an environmentally friendly alternative in the future

80

Points

Package contents & scope

Complete

100

Points

Instructions for use

Written in German, easy to understand

100

Points

TOTAL

95

Points

Weighting: 20%
*Themaximum score is 100 points

The Stilform sauna heater impressed us in our test with its sturdy and environmentally friendly packaging. The cardboard box is robust and protects the product sufficiently from damage. Only the plastic film used to secure the product components could be replaced by a more environmentally friendly alternative in the future. The contents of the package are complete and contain all the parts required for safe installation and commissioning of the sauna heater. The supplied instructions for use are in German, well-structured and clearly formulated so that the user can easily follow the necessary steps. Overall, the Stilform sauna heater received a good rating in all categories in our tests.

Comprehensive set

The first time in your hand

Product processing and appearance

Before we start the practical test, we take a close look at the workmanship of the products. How high quality are the materials used? Are the look and feel satisfactory?

Before we start the practical test, we take a close look at the workmanship of the products. How high quality are the materials used? Are the look and feel satisfactory?

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Visual appearance

Attractive, neutral design of the stove. The controller does not look very appealing or modern. However, you can select a visually more attractive variant (digital) here

80

Points

Processing

Very good workmanship

100

Points

Stability

Stands very stable

100

Points

Sustainability of the product

No details, but use of high-quality materials

70

Points

TOTAL

88

Points

Weighting: 20%
*Themaximum score is 100 points

Stands securely and stably

The Stilform sauna heater impresses with its attractive, neutral design and blends in well with various sauna styles. However, the controller supplied is less modern; a more visually appealing digital version is available as an alternative. In terms of workmanship, the heater impresses with its very good quality, featuring high-quality materials and precise workmanship. The sauna heater has an extremely stable design and remains stable even during intensive use. There is no explicit information on the sustainability of the product, but the use of durable, high-quality materials speaks in favour of a resource-saving design. The Stilform sauna heater therefore receives a high rating overall in the areas of design, workmanship and stability.

This is what our practical test showed

Does the manufacturer keep its advertising promises?

Our practical test has the highest relevance and therefore weighting. Here, the product has to undergo a wide range of criteria and tests. We check the functions and product promises of the test article.

Our practical test has the highest relevance and therefore weighting. Here, the product has to undergo a wide range of criteria and tests. We check the functions and product promises of the test article.

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Heat output

The measured temperature corresponds to the manufacturer’s specifications

100

Points

Temperature control

The temperature control works extremely precisely

100

Points

Cable connections and plugs

All cables and connections are in perfect condition without any visible damage or functional impairment. There was no excessive heat generation and all connections worked perfectly during the functional test

100

Points

User interface of the controller

The controller’s user interface is extremely intuitive and provides an immediate and direct response to all inputs, without any delays. This ensures a seamless user experience

100

Points

Compatibility with various sauna stones

All sauna stones tested show complete and unrestricted compatibility under the test conditions. There are no physical changes or loss of performance

100

Points

TOTAL

100

Points

Weighting: 45%
*Themaximum score is 100 points

In our tests, the Stilform sauna heater fulfils the manufacturer’s specified heat output and reaches the specified temperature exactly. The temperature control works precisely and reacts quickly to changes, ensuring a constant supply of heat. All cable connections and plugs are in immaculate condition; no visible damage or functional defects were found and there was no excessive heat build-up. All connections worked reliably in the functional test. The controller’s user interface is highly intuitive and provides a direct response to every input, ensuring a smooth user experience. Compatibility with various sauna stones is also a given; all stones tested showed complete compatibility and no physical changes or performance degradation.

Suitable for all stones
Test plan

You can find a detailed insight into the evaluation criteria of the practical part of the test and the distribution of points here. If you are also interested in the evaluation of our other test criteria, please read our document on the evaluation process.

Price/performance ratio

and ratings from consumers

Finally, we analyse how the product compares to the competition. Can it keep up with the competition in terms of price and quality? Would we generally recommend buying it? We also look at the consumer reviews and check whether the critical and positive reviews are actually justified.

Finally, we analyse how the product compares to the competition. Can it keep up with the competition in terms of price and quality? Would we generally recommend buying it? We also look at the consumer reviews and check whether the critical and positive reviews are actually justified.

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Price / performance ratio

Very good performance in the lower price segment

90

Points

Rating cut

At the time of testing, the product had not been listed on Amazon for long enough. Therefore, no other reviews are available, so this point is neglected in the evaluation.

TOTAL

90

Points

Weighting: 15%
*Themaximum score is 100 points

Prices of up to €500 are charged on the Internet for equivalent products. Very affordable products are available from as little as € 169 . The Stilform sauna heater (6 kW, Digital Contoller) is therefore currently in the lower price segment with a price of €269. For the quality and performance received, the price-performance ratio is very good.

Overall result

1. packaging & contents

20%

95

Points

2. product processing & appearance

20%

88

Points

3. in the practical test

45%

100

Points

4. price/performance & consumer reviews

15%

90

Points

TOTAL

95

Points

*Themaximum score is 100 points

Sauna Heater
of the brand
Stilform
achieved
95
Points in our test and therefore passed. The test was carried out in the test period
11/24
and is stored in our database under the licence number
240923004
. Further information on our test procedure can be found at www.pruefengel.de/testverfahren.

The practical tests are based on careful observations and do not include long-term or laboratory tests. The test judgements reflect the personal impressions and opinions of the testers who try out the products in everyday use. We would like to emphasise that these evaluations do not claim to be exhaustive and may reflect both subjective and objective impressions. The evaluations are made to the best of our knowledge and belief, without any liability being assumed for the accuracy or completeness of the test results. It is important to note that our tests are not based on legal requirements, medical effects or specific ingredients of the products. We rely on the advertising claims and information provided by the manufacturers, but use of the information is always at your own risk. Our efforts are aimed at ensuring a serious and thorough testing procedure, which has been developed in a long and professional process in close co-operation with our testers.

The practical tests are based on careful observation and do not include long-term or laboratory tests. The test ratings reflect the opinion of our experts and are based on careful analysis. We would like to emphasize that these evaluations do not claim to be exhaustive and reflect both subjective and objective impressions. The assessments are made to the best of our knowledge and belief, without any liability being assumed for the accuracy or completeness of the test results. It is important to note that our tests are not based on legal requirements, medical effects or specific ingredients of the products. We rely on the advertising claims and information provided by the manufacturers, but use of the information is always at your own risk. Our efforts are aimed at ensuring a reputable and thorough testing process, which has been developed in a long and professional process in close cooperation with our experts.

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Evaluation process

You can find a detailed insight into our evaluation process, which forms the basis for our product ratings, here:

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Our product evaluations are carried out exclusively through direct, on-site tests. This ensures a detailed and specific examination of the product properties. You can find more information about the test procedure here.

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