enceinte fermée avec ventilation

CONT: Enclosure hoods are designed to enclose the emission source. Examples of enclosure hoods include paint spray booths, laboratory hoods, belt conveyor enclosures, bin or hopper enclosures and abrasive blasting cabinets. These hoods allow contaminants to disperse within the enclosed space, but prevent stray air currents from carrying the contaminant into the work area. The dispersed contaminants are subsequently withdrawn from the enclosure by exhaust ventilation.
OBS: Enclosure hoods can be designed to completely seal the emission source (total enclosure) or to allow access to the interior of the enclosure (partial enclosure). In theory, there is no need for exhaust ventilation in total enclosures.