The presence of CO in a car park implies that other dangerous fumes (e.g. benzene) will also be present. On account of this, the German authorities have decreased the bounds for CO in car or truck parking facilities from a hundred ppm to 50-60 ppm, with regards to the federal https://car-park-ventilation12334.popup-blog.com/35440519/rumored-buzz-on-car-park-ventilation