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![FreciousPlus cabin filter: Mann Hummel is waging war on allergens - BYinnovation sustainable development FreciousPlus cabin filter: Mann Hummel is waging war on allergens - BYinnovation sustainable development](http://byinnovation.eu/wp-content/uploads/2015/09/MANN-HUMMEL_filter.jpg)
FreciousPlus cabin filter: Mann Hummel is waging war on allergens - BYinnovation sustainable development
![Stuttgart, Germany. 24th Apr, 2019. An employee of Mann Hummel retrofits filter columns at the Neckartor with filters that can filter both fine dust and nitrogen dioxide. Credit: Sebastian Gollnow/dpa/Alamy Live News Stuttgart, Germany. 24th Apr, 2019. An employee of Mann Hummel retrofits filter columns at the Neckartor with filters that can filter both fine dust and nitrogen dioxide. Credit: Sebastian Gollnow/dpa/Alamy Live News](https://c8.alamy.com/comp/T5D0CJ/stuttgart-germany-24th-apr-2019-an-employee-of-mann-hummel-retrofits-filter-columns-at-the-neckartor-with-filters-that-can-filter-both-fine-dust-and-nitrogen-dioxide-credit-sebastian-gollnowdpaalamy-live-news-T5D0CJ.jpg)
Stuttgart, Germany. 24th Apr, 2019. An employee of Mann Hummel retrofits filter columns at the Neckartor with filters that can filter both fine dust and nitrogen dioxide. Credit: Sebastian Gollnow/dpa/Alamy Live News
![Mann+Hummel: Hidden champion fights fine particles | Business| Economy and finance news from a German perspective | DW | 07.02.2019 Mann+Hummel: Hidden champion fights fine particles | Business| Economy and finance news from a German perspective | DW | 07.02.2019](https://static.dw.com/image/47260299_101.jpg)