Where spraying is done in any room the employer must e the ventilation sure that the ventilation system conform to the following requirements:
- If the air supply and extraction is horizontal, the average air speed measured at a level of 1,5 metres above the floor, or at the level of the platform on which persons stand to work, shall not be less than 0,5 metres per second;
- if the air supply is vertical and the extraction thereof is done through slits or a grill along the side walls at floor level, the average air speed measured at a level of 1,5 metres above the floor, or at the level of the platform on which persons stand to work, shall not be less than 0,4 metres per second; or
- if the air supply is vertical and the extraction thereof is done through a grill over the whole of the floor area, the average air speed measured at a level of 1,5 metres above the floor, or at the level of the platform on which persons stand to work, shall not be less than 0,3 metres per second.