Stiftung Warentest: The 3 best air purifiers including a corona follow-up test

Air purifier at Stiftung Warentest

In 2020, Stiftung Warentest took a close look at air purifiers from the brands Beurer, De Longhi, Soehnle, Rowenta, Dyson, Honeywell and Philips (Source). The three best air purifiers in the test field were then tested again specifically for their effectiveness against corona viruses in 2021 (Source). I would like to briefly present these results to you here.

The top 3 from the air purifier test 2020

It is necessary to state in advance that the following criteria are included in the main grade of the evaluator air cleaner included:

  • air Treatment
  • Handling
  • environmental properties
  • Safety
  • Data protection of the app

The air purification effect is the most important property with 60% of the overall rating, but unfortunately none of the devices achieved a "good" rating here. The reason for this is, for example, with the test winner "Philips AC2889 / 10“That it only filters formaldehyde sufficiently well. In contrast, it filters pollen and cigarette smoke well.

The Philips AC2889 / 10 scores best in the Stiftung Warentest test and also cuts a good figure in the Corona air filter test (Photo: Philips).

The Philips AC2889 / 10 scores best in the Stiftung Warentest test and also cuts a good figure in the Corona air filter test (Photo: Philips).

Test scenario in the corona post-test

In order to test how the air purifiers are suitable for filtering corona viruses from the room air, the following tests were carried out:

  • A test room with a volume of 40 cubic meters was enriched with aerosol particles.
  • Then the air purifier was turned on and allowed to run for 20 minutes.
  • The percentage of the original aerosols that was filtered out was now measured.
  • In order to simulate aging of the filter, the smoke from 100 cigarettes was then blown into the room.
  • Then aerosols came into the room again and it was filtered again at the highest level for 20 minutes.
  • How much was then filtered out of the air is the second percentage value in the information of the corona test.

Basically you can recommend the top 3, but it is important to know their weaknesses. For this reason I would like to briefly introduce all three - starting with the test winner.

1st place: Philips AC2889 / 10 - grade 2,4

The Philips AC2889 / 10 does best in the test because it filters smoke and pollen well and its filter ages more slowly than that of its competitors.

By the way, on the Amazon product page of the air purifier, people repeatedly write when asked that an air purifier from Newentor is much cheaper and better. This is a commercial and can safely be ignored.

Technical details about the Philips:

  • Price: about 290 Euro
  • Replacement filter set approx. 80 euros
  • Room size: up to approx. 79 square meters
  • Aerosol filtering in the corona test: 95% / 90% (the best in the test!)
160,00 EUR
Philips AC2889 / 10 air purifier 2000 series (room size up to 79 sqm, app control, ...
  • Filters pollen, dust, bacteria and ultra-fine particles up to a size of 0μm and even removes odors ...
  • Ideal for allergy sufferers: Removes up to 99% of the allergens that are often in the air. Specially developed ...
  • App for controlling the air purifier with comprehensive information about the air quality outside and inside and useful ...

2nd place: Soehnle Airfresh Clean Connect 500 - grade 2,5

The Soehnle Airfresh Clean Connect 500 is good for pollen and the best filter in the test for formaldehyde. Only with cigarette smoke did it break in after about 100 cigarettes and only moderately filter the smoke.

Technical details about the Soehnle:

  • Price: about 190 Euro
  • Replacement filter set approx. 40 euros
  • Room size: up to approx. 78 square meters
  • Aerosol filtering in the corona test: 90% / 46%
130,99 EUR
Soehnle 68098 Airfresh Clean Connect 500 with Bluetooth Air purifier with app connection, Air Purifier ...
  • App connection - A connection with the Soehnle Connect app provides useful information on air quality ...
  • Strong combination filter - the four-stage cleaning system (pre-filter, fine particle filter, activated carbon filter & UV-C light) removes up to ...
  • Air quality - the air purifier for dust shows the fine dust pollution, a luminous LED ring shows the current level ...

3rd place: Rowenta PU6080 Intense Pure Air Connect - grade 2,6

The Rowenta PU6080 Intense Pure Air Connect is good at filtering pollen and smoke. In terms of smoke reduction, it actually has the best effect in the entire test field. However, the situation is different with formaldehyde, because the filter performance is only weak here.

Technical details about the Rowenta:

  • Price: about 320 Euro
  • Replacement filter set approx. 50 euros
  • Room size: up to approx. 79 square meters
  • Aerosol filtering in the corona test: 95% / 80%
180,00 EUR
Rowenta PU6080 Intense Pure Air Connect air purifier | controllable via app | Auto mode | ...
  • Controllable via the Pure Air app: constant display of indoor and outdoor air quality, as well as control of ...
  • Smart Control: Air quality is detected and the cleaning performance is automatically adjusted, including Auto-Day and ...
  • Filters up to 99,9% of airborne particles the size of viruses

Air purifiers and corona - a residual risk remains

The testers from Stiftung Warentest make it clear right from the start that an air purifier cannot protect against corona infection. If two people sit across from each other less than 1,5 meters apart in the room, there is no air purifier that can help here.

The most sensible use is therefore that you want to get the room halfway free of the aerosols after a visit and thus reduce the risk of infection. However, it must be noted here that cross ventilation (opening two opposite windows in the room completely for 5 minutes) is significantly more effective than an air purifier.

From my point of view, air purifiers are therefore only useful in relation to Corona in windowless, not too large rooms.

On the other hand, they are very suitable for kitchen smells, smoke or pollen. We use ours Lifubide X600 (A top device by the way!) for example in the bedroom in summer and otherwise in the kitchen, as we don't have an extractor hood.

Thanks to its neutral color and timeless design, the air purifier fits into almost any home or office.

Thanks to its neutral color and timeless design, the Lifubide X600 air purifier fits into almost any home or office (Photo: Sir Apfelot).

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