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All publications for the rubric Air

18.05.2022
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Air

Breaking the ongoing pandemic wave with an air purifier and being prepared for the next

Is the Covid pandemic over?

The Minister of Health warns that the pandemic is far from over. The World Health Organization (WHO) still classifies it as a global pandemic and has currently even increased its assessment of the threat potential. At the beginning of the pandemic and even last year, the WHO stated that SARS-CoV-19…

Make the vortices glow: Using tracer particles, a light projection, and high-speed cameras, airflow and particle dispersion are measured indoors at the Hermann Rietschel Institute.

Fig. 1: Comparison of the risk factor xr from the simplified risk model for various everyday situations. The durations of stay vary here – a full work or school day is assumed, while a visit to the cinema or restaurant is correspondingly shorter. The reference value is xr = 1 for a half-hour stay in a supermarket with a mask. The value of xr is independent of the respective virus variant.

Fig. 2: How many additional people can an infected person infect on average in a specific situation? This is indicated by the

Fig. 3: Predicted infection risk for an employee in a large office with ten healthy individuals and one infectious person, plotted over a full workday. The curves correspond to the different measures (combinations) listed on the right. The term

Fig. 4: Diagram for determining the infection risk when an infected person is present and statistically averaged infectivity. In the example (red arrows), for moderate ventilation and an average effectiveness of worn FFP2 masks during a six-hour stay, the point is located at the borderline between a low and a medium risk of more than one additional person becoming infected. This applies regardless of a specific number of people and for all typical room sizes.

22.03.2022
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Air

Infection risk via aerosols – field test in the lecture halls of TU Berlin – practical recommendations for specialists and building management

Corona measures: It's the dose of CO₂ that matters

Researchers from the Hermann Rietschel Institute of the Technical University (TU) Berlin and other scientists have developed a simplified risk model to provide practical and evidence-based recommendations for building and event management during the COVID-19 pandemic. It is based on a validated infe…

With approximately 40 employees, DKF Kloz GmbH manufactures and coats wire products. Before optimizing the extraction system, there was so much smoke at the four welding machines that the employees could hardly be seen.

Thick air in the hall is a thing of the past. Today: completely smoke-free: Today, the extraction system works so well that the filtered air is recirculated back into the hall during winter. The employees can breathe easily at their workplaces again.

Well-deserved applause: DKF Kloz GmbH from Fellbach demonstrates what small and medium-sized companies can achieve in terms of environmental protection. For this, Managing Director Cengiz Öztok received a certificate from Baden-Württemberg's Minister for the Environment, Thekla Walker, at the so-called EFFICIENCY SUMMIT. Keller Lufttechnik contributed to the success by designing and installing an energy-efficient extraction system that allows clean air to be recirculated into the hall.

The company DKF Kloz GmbH (wire, plastics, and paints) has been established in the market for approximately 50 years. Located in Fellbach, DKF develops, produces, and sells finished products made from wire, plastics, and their combinations.

20.03.2022
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Award

Mid-sized DKF Kloz GmbH investing in pollution control

Employing approximately 40 people, DKF Kloz manufactures and coats wire products. As a finalist for the Gipfelstürmer Award, the company is a recent recipient of a special commendation by the state government of Baden-Württemberg, having emerged as an environmentally responsible industry model. Kell…

14.02.2022
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Air

Eurovent 4/23-2022: Selection of air filter classes according to EN ISO 16890 for general ventilation applications – Fourth edition published

The leading air filter manufacturer Camfil welcomes the fourth edition of the Eurovent 4/23 guideline. The new edition takes into account the 2021 updated global air quality guidelines of the World Health Organization (WHO), which set stricter standards for air quality. The threshold levels at which…

With virus infection tests, e.g., a plaque or TCID50 assay, the Fraunhofer researchers examine whether the air still contains infectious and thus transmissible viruses after inactivation. © Fraunhofer IGB

Numerical simulation of aerosol dispersion in a classroom: An infected person sits in the front right corner of the classroom. The selected cross-section shows the concentration distribution of the virus-laden aerosol. A room air purifier filters the aerosol-laden air and returns it cleaned. © Fraunhofer EMI

Device for the thermal inactivation of aerosol-borne viruses. © Fraunhofer IFAM / Apparatus for the thermal inactivation of aerosol-borne viruses. © Fraunhofer ITWM

Mobile reactor unit for on-site use. © Fraunhofer IMM / Mobile reactor unit for on-site use. © Fraunhofer IMM

31.01.2022
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Air

The AVATOR project investigates and optimizes various filter and air purification techniques

Indoor Air: How to Eliminate Viruses Effectively

How can viruses be effectively eliminated from indoor air? This question is still important. Efficient indoor air purification is essential, especially in schools. Fraunhofer researchers are investigating and optimizing various filter and air purification techniques in the AVATOR project.

In all Germ…

UV-C disinfection modules like AirStream from BÄRO can be integrated into existing systems absolutely easily and with minimal maintenance. (Photo: BÄRO)

AirCom Pro is easy to install indoors and is used similarly to a light fixture. (Photo: OFFICE)

31.01.2022
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Surface

UV-C systems from BÄRO ensure air hygiene at every scale

Due to the COVID-19 pandemic, the topic of indoor air hygiene has come into the public eye. UV-C air disinfection can help reduce the risk of airborne infections. Developed, manufactured, and distributed for over 25 years, BÄRO Clean Air Technologies produces UV-C-based air purification systems for…

21.11.2021
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Air

Increasing threat from fine dust

Fine dust consists of a complex mixture of solid and liquid particles and is classified into different fractions depending on their size.

Distinguished are PM10 and PM2.5 (PM, particulate matter) with a maximum diameter of 10 and 2.5 micrometers (µm), and ultrafine particles with a diameter of less t…

10.09.2021
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Air

CWS now offers a hygiene for air hygiene and infection control: INTERsens® 250R, a combined disinfection and air purification device.

Hygienic indoor air: With UV-C air purification against germs

– Hygiene expert CWS complements its range with the INTERsens® 250R, a solution for air disinfection
– Combined disinfection and air purification device with simple plug & play installation for quick set up
– Air purification device renders viruses, bacteria and fungi in room air harmless

CWS, an integ…

The tank overpressure system TPU 500 protects liquids in silos from product contamination. (Image source: Freudenberg Filtration Technologies)

16.07.2021
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Air

Innovative tank overpressure system TPU 500 from Freudenberg Filtration Technologies prevents contamination of liquid foods during storage and filling

Protect liquid foods with overpressure

Milk or milk-based liquids, cream, raw fruit juices, vegan soy drinks, liquid eggs, sugar-free sodas – minimizing risks when processing such delicate foods requires a high level of hygiene. An entry point for bacteria, yeasts, and mold spores can be silos and tanks where liquid foods are stored temp…

The new RadiPac as a ready-to-install Plug & Play solution in a compact support spider construction for easy wall mounting.

23.06.2021
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Air

Better and quieter thanks to new wheelset geometry and high-performance electronics

New EC radial fans for more power and efficiency

Fans for air conditioning and ventilation technology are continuously being developed further, as the demands of users, especially regarding control options and energy efficiency, are increasing rapidly. Legal requirements, growing environmental awareness, and potential savings in operating costs co…

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