Ventilation casing for building ceiling, usable e.g. in agricultural food industries

摘要

The ventilation casing has a movable cap (3) allowing access to the grill (4) situated under the casing to release and passage across it for cleaning. The release can have two double hooks forming handles, suspended on two tubes to allows maintenance without tools. The casing (1) is inserted into the ceiling and held by the frame (2). The movable cap closes the casing. The cover has a central opening with a connecting clamp for the extractor duct.