About us
Pioneers in Biological Air Purification
Since 1993, we have been setting standards in biological exhaust air treatment. With over 500 installed biofilters in industries such as manufacturing, agriculture, food production, and recycling, we offer efficient and sustainable solutions that protect the environment and conserve resources.
Our biofilters stand for quality, innovation, and durability – 100% Made in Germany.
Certificates & Downloads
Unsere Biofilter erfüllen höchste Qualitäts- und Umweltstandards. Mit zahlreichen Zertifizierungen garantieren wir unseren Kunden zuverlässige, geprüfte und nachhaltige Lösungen.
Suitability assessment procedure
Officially tested by the Ministry of the Environment NRW
Show certificateChronological milestones
Development of the first Hartmann biofilter for internal animal husbandry
1993
10 years of experience in building and selling biofilters
2003
First measurement and publication by the State Environmental Agency NRW on ammonia, odor, and germs
2004
Start of sales and expansion into new industries such as sewage sludge drying and biogas plants
2005
Inspection and certification for compliance with ammonia (NH3), dust, and odor limits by TÜV Rheinland
2009
Acquisition of new customers in the fields of food processing, recycling, and chemicals
2011
Successful participation in the suitability determination procedure under the filter decree of the State of NRW for the long-term use of the Hartmann biofilter
2015
Over 400 installed biofilters in various sizes and countries since 1993
2020