Freudenberg Nonwovens on VDI committee
New guideline stipulates regular changes for vehicles’ interior filters
Weinheim, April 26, 2004 – An automobile’s cabin air filter should be changed after two years at the latest. Highly stressful climatic and operating conditions, such as city driving, will necessitate even shorter intervals between replacements. These stipulations come from a new guideline (No. 6032) of the Association of German Engineers (VDI), which since February 2004 has been issued as a white paper. An honorary VDI committee took less than two years to draw up this guideline, which defines specifications like hygiene and maintenance requirements for the ventilation and air treatment systems in passenger cars. Basically, VDI 6032 demands the installation of cabin air filters in all passenger cars. Freudenberg Nonwovens was the only filter manufacturer to be represented on the guideline committee. The filter specialists provided the body with comprehensive expert input.
Changing of the filter guards
Depending on the car ventilation system involved, there are differences in terms of filter utilisation: in the case of vehicles with air conditioning, the VDI demands the installation of an interior filter – a particle or combi-filter – for cleaning the outside air. For ventilation systems without an air-conditioner, the VDI urgently recommends air filtration. The general principle here is: a ventilation system’s operation must not cause the air quality to worsen. This is why, in addition to the design requirements for the ventilation system, it is necessary to install cabin air filter.
VDI 6032 specifies the minimum particle collection efficiency for cabin air filters. The high filter performance ensures that the air passed into the vehicle’s interior has had a very large proportion of particles removed. In addition, the risk of equipment soiling is significantly reduced. In terms of maintenance for cabin air filters and ventilation systems, VDI 6032 specifies the following points for particular attention: secure and easy installation of the cabin filter by appropriately qualified and trained personnel, plus conveniently effective cleaning of the air inlet channel in the vehicle. Moreover, the date of the last filter change has to be visibly documented. A cabin filter’s design is required to ensure that the filtering function is not impaired by mechanical stresses either during actual installation or during operation. This stipulation is best met by the original parts tested and installed by the vehicle manufacturer concerned.
Under the chairmanship of Prof. Dr. Schata, Head of the Institute for Health Research and Hygiene in Düsseldorf, the guideline was defined by representatives from the automotive industries, shipbuilding, railway and air-conditioning manufacturers. The German Federal Ministry for Education and Research (BMBF) and numerous academic organisations like the Institute for Hygiene and Air Purity at Berlin Technical University. It can be obtained from the Beuth Verlag publishers in Berlin.
About Freudenberg
Freudenberg is a diversified family firm, with its operations handled by Seals and Vibration Control Technology, Nonwovens, Household Products, Chemical Specialities, Building Systems and IT Services Divisions. The Group employs more than 30,000 people in 54 different countries, for a total turnover of around four billion euros.
The group’s nonwovens company Freudenberg Filtration Technologies KG is the world’s biggest producer of nonwovens. The portfolio includes interlinings for textiles, filter applications, hygiene and medical textiles, technical nonwovens and tuft for carpeting. The company is the world’s leading producer and vendor of micronAir interior filters for the automotive industry. It is headquartered in Weinheim an der Bergstrasse, Germany. Freudenberg Nonwovens employs a total of over 5,000 people in twelve countries, and operates 17 production facilities. The Turnover in 2002 was 846 million euros.
You will find further information on the internet under www.freudenberg.de and www.micronair.com. Pictures are available from the press contact.
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