Audit requirement for suction:
According to § 53 para 2 of the Workplace Ordinance and the Accident Prevention Regulations VBG 1 -. § 39 are gas-extraction of a particular testing obligation.
This stipulates that safety devices are such. B. suction maintained at regular intervals and tested for their ability to function.
The test must be the first time and thereafter at appropriate intervals, but at least once a year by an expert and include a determination of the extracted air quantity at the collection point. About the examination are written records required (log book) - see also ZH 1/140 paragraph 6.