The existence of CO in an auto park indicates that other hazardous fumes (e.g. benzene) may also be current. On account of this, the German authorities have lessened the bounds for CO in automobile parking facilities from a hundred ppm to 50-sixty ppm, depending on the federal point out in https://carparkventilation13345.blogrenanda.com/43137509/helping-the-others-realize-the-advantages-of-car-park-ventilation