MANN-FILTER Presents New CO2-Reduced Filters

[Counterman]

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announced its new CO₂-reduced filters impregnated with plant-based raw materials, manufactured using renewable energy and packaged in sustainable, recycled material.

Filters with cellulose media have previously been impregnated with fossil-based phenolic resin, which provides stability, rigidity and chemical resistance, according to

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, which said it has partially replaced this crude oil-based treatment with the plant-based raw material lignin, a natural product contained in wood. Lignin is what makes wood stable and can also have the same effect on filter media, the company explained.

This technology is initially being used in selected MANN-FILTER air and oil filters, with more filters will follow. As a result, MANN+HUMMEL said it is reducing the CO₂footprint of the relevant lignin impregnation during production by up to 5 percent compared to regular phenolic resin impregnation. In addition, this reduces the amount of crude oil used for impregnation by around 27 percent.

The calculation of the CO₂ values and the calculation method for determining the crude oil savings have been externally verified and validated by ClimatePartner, a German organization that supports companies in calculating, reducing and offsetting CO₂ emissions and offers climate neutrality labels.

Thanks to the switch to lignin, the MANN-FILTER C 17 237 air filter, for example, saves 3.93 tons of CO₂ and more than 4,500 liters of crude oil annually, based on 2024 sales figures, the company said, with the material being used coming from certified sources. Lignin is produced in large quantities as a waste product in paper and pulp production—several million tons are generated worldwide every year.

In the independent aftermarket, the innovative and more sustainable air filters are now available as MANN-FILTER applications for almost 70 million cars and transporters in Europe, while oil filters are ready to use for almost 17.6 million vehicles, the company said. The improved impregnation will now be incorporated into defined series products, with MANN-FILTER products are gradually being converted to lignin.

“This means that customers do not have to choose between different versions, no additional storage space is needed, and no additional part numbers are required,” explains Dr. Lars Spelter, lead engineer for filtration materials at MANN+HUMMEL. “Everything should be kept as simple as possible for our customers. Externally, the partially plant-impregnated filters differ from the conventional ones. They are slightly brownish due to the characteristic color of the lignin they contain and they have a pleasant, natural odor. The innovative products are easy to recognize by the green leaf pictogram on the packaging. Our lignin impregnation is a successful example of how ambitious CO2 reduction targets in product development can also be implemented in series products.”

The new filters combine sustainability with consistently high performance in the usual original equipment quality and meet the strictest requirements of the automotive industry, MANN+HUMMEL explained.

To further reduce CO₂ emissions during production, MANN+HUMMEL added it will only use electricity from renewable sources or a combination of green electricity and certificates and guarantees of origin from hydro, solar, or wind power plants from 2025. Energy sources for the generation of process heat are also to be CO₂ neutral from 2035 in order to achieve a significant milestone in CO₂-free production.

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