Air filter with coupled sample collection/analysis

A filter module for filtering air of at least a part of a building or of air of an exhaust air purification unit of a production process,

• wherein the filter module is replaceably arrangeable in a filter system,
• wherein the filter module comprises a filter body, which is configured to filter air when it flows through, wherein the filter body comprises:
• a filter region, which filters the air which is flowing through from air accompanying substances;
• and
• an analysis region, which is configured to support the analysis of at least one of the air accompanying substances and the air quality,
• wherein the filter body is configured in such a way that, at a speed of the volume flow of 0.1 m/s to 5.0 m/s through the filter body, the pressure drop of the air which flows through the filter body is less than 450 Pascal,
• wherein the filter region is configured in such a way that, at a pressure drop range of 10 Pa to 450 Pa across the filter module, the composition of the air flow in the analysis region changes by less than 40% compared to the composition in the filter region, and
• wherein the analysis region is configured relative to the filter region in such a way that the air in the analysis region comes into contact with the same air accompanying substances as in the filter region by more than 90%.