Air purification devices and CO2 traffic lights - some districts like Erding rely on these technical air fresheners.
The district and the city of Freising do not.
Room fans are in use in Nandlstadt
As early as January, sensors were installed in ten classrooms at the primary and secondary school in Nandlstadt, which measure the CO2 concentration and issue a warning if a critical value is reached.
The other classrooms are equipped with a so-called "air conditioning system" and are therefore automatically adequately ventilated.
Local chief Gerhard Betz considers the devices to be "a good story - also for the time after Corona".
And the headmistress Elke Gold is also grateful for the purchase.
Moosburg: Measuring devices - but no cleaners
There are different conditions at Moosburg's educational institutions - depending on which material expense manager is responsible. At the Karl-Ritter-von-Frisch-Gymnasium, for example, it is the district that is why the school received a rejection. "We have been informed that no air purification devices have been approved," reports school principal Claudia Theumer. "The district has said that our classrooms can be sufficiently ventilated through the large windows."
Admittedly, Theumer admits that this is not a problem in summer.
“But in winter this leads to enormous heat loss.
If we ventilate there regularly, it is very cold in the rooms. ”She is aware that the purchase of air purifiers is a cost factor.
“But in winter it would have been helpful to extend the ventilation interval.
The children were frozen in class, and we could only ask them to wear warm clothes. ”At least there was no increase in the number of illnesses, reports the headmistress.
When it is time to ventilate, this is reported by CO2 measuring devices in the classrooms: “As soon as it beeps, the windows are opened and the alarm is switched off.” This happens about every 15 minutes - depending on the size of the room and class size.
Things look better in middle school
On the other side of Albinstrasse, in the Georg-Hummel-Mittelschule, the material expenses officer has shown themselves to be more generous: “The city of Moosburg offered us to cover all the costs for air purification devices,” says Rector Karin Schmidt. Because the middle school recently received a new ventilation system as part of a renovation, additional devices were ultimately only required in three rooms.
The school was also actively offered CO2 traffic lights.
“We now have five, but they were installed for test purposes.” The traffic lights would be a not inconsiderable visual distraction for the students.
"The fact that we have had good experiences with them is mainly due to the fact that they are intermittently ventilated every 20 minutes anyway - and because of the good air quality, there is no signal at all," says Schmidt.
Schmidt praises the cooperation with the city in the highest tones: “We are supported absolutely well, both financially and with uncomplicated, quick measures.” The fact that there were waiting times for the delivery of devices in autumn is due to the high demand.
The device was too loud in Kranzberg
Approved by the local council and decided on: That was the state of affairs of the air filter systems for the primary school in Kranzberg.
And then the headmistress Heike Hartmann looked at three different models - and listened to them.
And at least for these three statements, I came to the clear conclusion: too loud, too annoying.
"These devices are absolutely sensible if they can be easily integrated into everyday teaching," says Hartmann.
"But you must not interfere with teaching."
At the school in Kranzberg one is in the fortunate position that every classroom has windows and one can ventilate well.
"If that weren't the case, you would of course have to think about whether you have to accept the volume." But especially in Kranzberg you don't have to rely on air filters.
Nonetheless, Heike Hartmann wants to take a look at the quietest device on the market together with the parents' council and representatives of the community.
Only then will it be decided whether Kranzberg will buy some or not.
Until then, the teachers feel very well supported by the CO2 traffic lights.
“They don't make any noise.
There is someone in every classroom who does their job reliably. ”Thanks to the traffic lights, it is also guaranteed that you don't ventilate“ about ”five minutes, but open the window until the fresh air content is sufficient and the traffic light comes on again Green changes.
Allershausen: Help through the traffic lights
These traffic lights are also available at the elementary and middle school in Allershausen.
And Rector Georg Riedel is also very satisfied with it: "Even if we don't have many classes in the house at the moment," adds the headmaster.
Nevertheless: The teachers are happy to have the equipment and feel well supported in ventilation - “an important component in the safety concept in schools”.
Eching: Huge windows provide fresh air
As one of the newest schools in the district, the Echinger Imma-Mack-Realschule is in the enviable position of not needing CO2 traffic lights or air filters.
“We have incredibly large windows and therefore such good ventilation that we don't need any air filters,” reports headmistress Gertraud Weber.
CO2 traffic lights have already been tested (Weber: “In the pandemic phase, when all the students were still in class”), but it turned out that their use or the results were “insignificant”.
Here, too, the reason: the good ventilation.
Neufahrn: Use in the chemical rooms
One does not seem to have problems with open windows in the Neufahrner elementary school on Fürholzer Weg, where the secretariat learned that air purifiers are not provided.
However, there is a CO2 traffic light in every classroom.
In Corona times, CO2 measuring devices are also part of the basic equipment of the rooms at the Oskar-Maria-Graf-Gymnasium Neufahrn.
As OMG head Juliane Stubenrauch-Böhme says, the district office has promised two air purification devices.
These are to be used in two chemical rooms that are rather difficult to ventilate.
City of Freising rejects air purifiers
Air purifying filters and CO2 measuring devices are currently not used in schools sponsored by the City of Freising. The reason: “Cleaning and filtering devices do not mean any fresh air supply, so they generally only make sense for rooms that actually cannot be ventilated. This does not apply anywhere in the classrooms of the municipal facilities ”, as city press spokeswoman Christl Steinhart emphasizes. The city administration is constantly in close contact with the school management. Because of the good ventilation options, however, no school has expressed interest in filter systems.
After all, health experts have given cleaning devices the appearance of "sham safety" in relation to actually consistent ventilation, argues Steinhart.
According to the current “general hygiene plan” for schools, ventilation has top priority in order to reduce the virus load.
A school, reports the town hall spokeswoman, has received CO2 measuring devices at its own request.
After a thorough test phase, however, they would have "not been found to be really helpful in the current situation".
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