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.

ROSENFELD
Aerator

The aerator from Rosenfeld made a very good impression in the test. The product makes it easy to save water, which not only saves resources but is also easy on the wallet.
The flow rate of the tap is reduced from the usual 10-12 litres per minute to 5-6 litres per minute. Of course, this usual flow rate always depends individually on the pressure of the pipes and other circumstances.
There is no loss of comfort as the water is enriched with air, which makes it easier to use.
It is installed by screwing in the thread on a standard tap and, thanks to its design, blends in unobtrusively with the tap.
The aerator also has a filter feature, which prevents dirt from the pipe from reaching the user’s hands.
Furthermore, there are no unpolished edges or manufacturing defects on the product.

Advantages

✅No loss of comfort during use
✅helps against calcification
✅Water-saving
✅Family-run German company

Disadvantages

❌Unfortunately no telephone customer hotline

The first impression

The packaging and labelling

ℹ️ Here we take a closer look at packaging. Sustainability is becoming an increasingly important factor. Of course, adequate protection of the product must also be ensured.

CriterionRemarkScore achieved*
Product protectionCarton is sturdy, product sufficiently protected100 points
Sustainability PackagingArticle was packed compactly – but plastic packaging was used75 points
Product labellingLabelling available100 points
MiscellaneousHigh-quality packaging, also suitable as a gift100 points
Total94 points
Weighting: 10%
*The maximum score is 100 points
Verpackung der Strahlregler
Packaging of the aerators

The aerator from Rosenfeld arrived for our test in the typical shipping box, so it was easy to open by removing the adhesive strip and was delivered undamaged.
There were two aerators in the box and a QR code was printed on the packaging, which referred to Rosenfeld’s Amazon shop. On this Amazon page, it was possible to follow the installation of the product.
Unfortunately, plastic was used in the packaging of the aerators, but the product protection is complete in this case and the parcel even withstood the rough handling of the postal workers, so that the aerators were in perfect condition. For this reason, the packaging is not completely recyclable.
The first impression is very good, as neither the product nor the packaging used was damaged.

After unpacking

Package contents and instructions

ℹ️ Most people’s first impression after unpacking is immediately memorable. Are the contents of the pack complete and does the manufacturer make it as easy as possible for me to use the product straight away?

CriterionRemarkScore achieved*
Package contents & scopeSet of 2 aerators including seals100 points
Instructions for useInstallation is explained clearly on the Amazon page using pictograms – an enclosed installation guide would have been nice90 points
Contact informationCan be found on the box and in the operating instructions – unfortunately no customer hotline given90 points
Total93 points
Weighting: 10%
*The maximum score is 100 points

After unpacking, there were six items on the kitchen table: the aerators, the brass rings for installation and the rubber seals.
Particularly noteworthy is the instruction manual, which clearly explains the installation of the aerators to the customer using pictograms. The installation and use of the aerator is straightforward.
Unfortunately, we were unable to find a telephone number on the packaging or in the instructions for use.
All in all, however, this is a very good way to dispatch a product.

The first time in your hand

Product processing and appearance

ℹ️ Before we start the practical test, we take a close look at the product processing. How high quality are the materials used? Is the look and feel satisfactory?

CriterionRemarkScore achieved*
Visual appearanceVery good visual appearance100 points
ProcessingVery good workmanship, no edges or defects100 points
StabilityProduct appears very stable100 points
Sustainability of the productNo information on sustainability – however, we assume a long service life due to the materials used72 points
Total93 points
Weighting: 20%
*The maximum score is 100 points
Einzelteile des Strahlregler von Rosenfeld im Einsatz
Individual parts of the aerator from Rosenfeld in use

The aerator from Rosenfeld makes a very good visual impression in the test. In addition to its simple design, it has no manufacturing faults. The aerator is made of high-quality V2A stainless steel and can therefore be installed on any tap that has the standard silver colour.
The product impresses with its good weight and sturdy workmanship. The customer is supplied with two high-quality aerators, which can serve the customer well.
Unfortunately, there is no information about sustainability on the Amazon product page or on the packaging. Due to the high-quality materials used, we assume a long service life.

This is what our practical test showed

Does the manufacturer keep its advertising promises?

ℹ️ Our practical test is the most relevant and therefore the most important. Here, the product has to undergo a wide range of criteria and tests. We check the functions and product promises of the test article.

CriterionRemarkScore achieved*
InstallationEasy installation, even by a layperson – thanks to easy-to-understand pictograms on the Amazon page100 points
Optics/ DesignSimple design and attractive appearance – fits into any bathroom100 points
Water-savingPromise of 5-6 litres per minute is kept – pleasant sparkling water effect100 points
Total100 points
Weighting: 40%
*The maximum score is 100 points

We really enjoyed using the aerator from Rosenfeld during the test. Installation is child’s play and can be carried out by any layman.
As the aerators are a solid colour, the customer can use the aerator in almost any tapthat has an M24 thread. This thread is particularly widespread in Germany and therefore offers customers the option of modernising all standard taps to save water.
We have also investigated the manufacturer’s claims of a water flow of 5-6 litres per minute.
Due to the high pressure and without the aerator, our tap currently has a water flow rate of around 19-20 litres per minute (around 3 seconds until 1 litre has flowed through).
After installing the aerator, we noticed that our tap reached one litre of water after 10.3 seconds, which brings us to an extrapolation of around 5.8 litres per minute. As a user, you don’t really notice this difference, as a lot of air is also added to the water jet, which creates a pleasant feeling.

Price/performance ratio

and ratings from consumers

ℹ️ Finally, we look at 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 analyse consumer reviews and check whether the critical and positive reviews are actually justified.

CriterionRemarkScore achieved*
Price / performance ratioGood price-performance ratio85 points
Rating cut4.3 out of 5.0 stars on Amazon65 points
Total75 points
Weighting: 20%
*The maximum score is 100 points

On the Amazon platform, consumers have given the product an average rating of 4.3 stars. One criticism is that the aerator only saves a small amount of water (1.5 litres instead of the previous 1.7 litres). Many customers like the fact that the dimensions fit standard taps and the materials used are of very high quality. We were also able to confirm these points in our practical test, but we find the water-saving effect more than impressive, as our tap now saves around 60 % water instead of 20 litres and we also have to point out in the review that how much water you save with a faucet aerator also has a lot to do with the pressure of the water pipe used.

Prices of up to €21.99 are charged on the Internet for equivalent products. Very inexpensive products are available for as little as € 3.99. With a price of € 11.99, the aerator from Rosenfeld is therefore in the middle price segment in our test. The price ratio is good for the quality and scope of services you get.

Overall result

WeightingScore achieved*
1. packaging & labelling10%94 points
2. package contents & instructions10%93 points
3. product processing & appearance20%93 points
4. in the practical test40%100 points
5. price/performance & consumer reviews20%75 points
Total92 points
*The maximum score is 100 points
Aerator
of the brand
ROSENFELD
achieved
92
Points in our test and therefore passed. The test was carried out in the test period
01/23
and is stored in our database under the licence number
221215003
. 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.

show more +

Download

Evaluation process

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

Similar Tests & Comparisons

  • Penerl Football – Shin guards for children

    Penerl Football – Shin guards for children

    11/24
  • Drive-on ramps for cars

    Drive-on ramps for cars

    11/24
  • Ehrenkind all-year sleeping bag with feet

    Ehrenkind all-year sleeping bag with feet

    11/24
  • Pleasure Planet Pocket Pussy

    Pleasure Planet Pocket Pussy

    11/24
  • Levoit – Air purifier Core 400s

    Levoit – Air purifier Core 400s

    11/24
  • KAIMANA Kids snorkelling set Kids SeaExplorer

    KAIMANA Kids snorkelling set Kids SeaExplorer

    11/24
  • KAIMANA snorkelling set AquaVision Elite

    KAIMANA snorkelling set AquaVision Elite

    11/24
  • Toilet paper from GOODS+GADGETS

    Toilet paper from GOODS+GADGETS

    11/24

How Prüfengel rates products


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.

Further practical tests

  • Duster set in test 2023

    Duster set in test 2023

    04/23
  • SkinVe® safety razor

    SkinVe® safety razor

    05/24
  • Pavox – Calf stretcher set

    Pavox – Calf stretcher set

    07/24
  • Pedal trainer from TRETMANN in the test 2023

    Pedal trainer from TRETMANN in the test 2023

    01/23
  • Coemo Ergo K slatted frame

    Coemo Ergo K slatted frame

    02/24
  • King Kong State Sprühlack

    King Kong State Sprühlack

    01/24
  • Drinking bottle in the test 2023

    Drinking bottle in the test 2023

    07/23
  • Dimono® Teapot

    Dimono® Teapot

    12/23

Categories

Discover our tests & comparisons in the various categories.
Car & Motorcycle
Clothing
Garden
Baby & Child
DIY store
Home & Living
Sport & Leisure
Household
Outdoor
Pets
Bathroom
Technology
Car & Motorcycle
Clothing
Garden
Baby & Child
DIY store
Home & Living
Sport & Leisure
Household
Outdoor
Pets
Bathroom
Technology