People spend most of their lives indoor, especially during the cold winter months. The COVID 19 pandemic increases the focus on minimising the risk of infection, also indoors, via indoor air quality. EMW filtertechnik offers manufacturers and users of mobile room air conditioning units and HVAC systems suitable HEPA filters of the HEPA filter classes H13 and H14. In addition to standard solutions, we can also offer newly developed filter solutions to ensure that your existing ventilation concept complies with the current needs.
The current corona pandemic requires a rethinking of the current practice for assessing indoor air quality. To reduce the probability of infection, high air exchange rates must be achieved. Ventilation increases the propor on of fresh air, but high air exchange rates are necessar to effectively reduce the infection risk. In cold periods, this approach affects the energy balance and the climatic feel‐good atmosphere of an interior. In addition, a potentially existing virus concentration can rise again after closing the windows.
Air purifier can ensure a permanent reduction of the risk of infection.
According to a study by the German Armed Forces University in Munich[1], room air conditioning
filters can minimise the risk of infection from COVID‐19 more efficiently than continuous ventilation.
Away from hospitals etc., however, room air conditioning filters with a separation function in the
HEPA area have rarely been required for rooms in the past. In case of doubt, common filter solutions
are not efficient enough to counter the risk of COVID‐19 infection. The corona pandemic makes it
clear that indoor air quality should be cleaned with air conditioning filter systems of the
HEPA filter classes.
According to a study by the Goethe University in Frankfurt a.M.[2], mobile air purifiers with
HEPA air filters can help to reduce the virus concentration by 90 percent within half an hour. If there
is a super‐spreader in the room, mobile air purifiers reduce the risk of infection, according to the scientists at the Goethe University. To this end, the following
requirements must be met by mobile room air conditioning systems:
[1]: Kähler, C. et al (2020): Können mobile Raumluftreiniger eine indirekte SARS-CoV-2 Infektionsgefahr durch Aerosole wirksam reduzieren?
[2]: Curtius, J. et al (2020): Testing mobile air purifiers in a school classroom: Reducing the airborne transmission risk for SARS-CoV-2.
On average, a child breathes in and out about 20 times per minute. Calculated over a school week, this translates into about 23,400 breaths. This is how often primary school children run the risk of becoming infected with coronaviruses. A risk that can be significantly reduced, for example, with mobile air purifiers and the HEPA air filters installed in them.
When EMW® came across the campaign of the Einrich primary school to equip all classrooms with the mobile "Air-Purifier", they immediately decided to take part in this project! “It is a matter close to our hearts to support such a great campaign. Children should be allowed to learn in a risk-free environment ", says Kerstin Schwab, authorized signatory of EMW®," After all, we are investing in our future ". Therefore, EMW® did not think twice and donated an amount which equals the protection of 5 primary school children. This corresponds to approx. 117,000 virus-free breaths per week.
As a training company in the technical and commercial sector, EMW filtertechnik is really pleased to be able to support young talent outside our own company.
EMW offers a range of HEPA air filters to minimise the risk of infection by viruses such as SARS‐CoV‐ 2. SARS‐CoV‐2 is also transmitted via particles which can be assigned to the size of a few hundreds of nanometers. Depending on the required air exchange rate, HEPA filters against covid-19 must be designed in such a way that the physical filtration effects for particle separation can also be effective at higher volume flows. In addition, the filter solutions for air purifiers must also be designed with regard to efficient energy consumption and low noise pollution. EMW offers you a range of HEPA filters for your existing filter system of mobile air purifiers and HVAC systems. We can also provide you with tailor‐made HEPA filter solutions which are optimally tailored to the specific requirements of air purifiers and HVAC systems.
