The presence of CO in a vehicle park signifies that other harmful fumes (e.g. benzene) are present. On account of this, the German authorities have minimized the boundaries for CO in auto parking facilities from a hundred ppm to 50-60 ppm, according to the federal point out in concern. An https://lorenzovnbqe.fare-blog.com/36841217/the-2-minute-rule-for-car-park-ventilation