Airdog Air Purifiers have been installed In Schools across Germany

A total of 869 devices will be set up before Christmas

Image (© District Office Aichach-Friedberg): Rainer Hurler (Head of the Municipal Building Department), District Administrator Dr. Klaus Metzger, Michael Metzger (LTEG GmbH) and Stefan Reinholz (Head of Building Management) with one of the mobile air cleaning devices that are currently being installed at the district schools.

In order to protect the health of the pupils and teachers in view of the ongoing infection rate and to enable the school to run as smoothly as possible, the district council decided shortly before the summer holidays to equip the district schools with mobile air filter devices.

After a short delivery delay due to corona-related disruptions in international shipping, the almost 900 devices ordered have now arrived and are currently being set up by employees of LTEG GmbH from Rain am Lech in classrooms, specialist rooms and teachers’ rooms at a total of eleven school locations. Schools that already have mechanical ventilation systems are excluded.
The following schools will be equipped with mobile air filters:
  • Friedberg High School
  • Deutschherren Gymnasium Aichach
  • Realschule Aichach
  • Konradin Realschule Friedberg
  • Edith Stein School Aichach
  • Realschule Mering
  • Aichach vocational school
  • Friedberg vocational school
  • Affing secondary school
  • Vincent Palotti School Friedberg
  • Business School Pöttmes

The mobile air filter devices with plasma technology of the type TPA® X8 Greenline eliminate and filter pollutants from the ambient air using a so-called cold plasma field. Its degree of filtration of 99.986% has been confirmed by a German medical laboratory, particularly with regard to the SARS-CoV-19 virus. Further advantages: The air purifiers that are procured do not emit any ozone or other pollutants and the devices are very quiet even in continuous operation (several operating levels are below the required 40 dB (A) sound pressure level) so that they do not disrupt school operations.

The classrooms are each equipped with two to four air purifiers, depending on their size. This ensures that the entire room air in a classroom flows through the air purifier 5 to 6 times per hour in order to ensure maximum protection against infection.
“In addition to infection protection, which of course has the highest priority, it was important to us – in view of the considerable investment that the district is making here – to also take future aspects such as follow-up costs and sustainability into account,” explains District Administrator Dr. Klaus Metzger.
In contrast to many alternative technologies with HEPA and UV-C, where follow-up costs arise from replacement filters or lamps and high power consumption, the pre- and main filter units of the devices purchased by the district do not have to be costly changed and disposed of, but can – afterwards Reaching the capacity limit – cleaned and then reused without any loss of quality. “This not only saves the district a lot of money, but also protects our environment,” says Rainer Hurler, department head of municipal construction in the district. The district will also save on electricity bills. Since the energy consumption of the purchased plasma devices is significantly lower than that of devices with HEPA and UV-C technology, there are also lower follow-up costs here.
Another advantage of the purchased devices is the long-lasting high filter efficiency. In the case of many devices with HEPA filters, this decreases quickly and significantly over time. Last but not least, Stiftung Warentest also referred to this fact in January of this year. In the case of the air purifiers that were procured, the efficiency of the same test method hardly decreases measurably, which means that the protective effect in schools remains high.
For the district, however, a high-quality re-use concept for the air purifiers was also the focus of its procurement. In addition to being used in the event of any further influenza waves, the air purifiers can also “only” be used to improve the quality of the indoor air. Because the purchased devices also reliably filter fine dust, pollen, other allergens as well as formaldehyde and fungal spores from the ambient air. The mobile air purifiers will therefore continue to be used in schools long after the end of the current corona pandemic.
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