342.1The following definitions apply in this Part.
“laboratory fume hood” means an enclosed and mechanically ventilated workspace that is located in a laboratory and is designed
(hotte de laboratoire)
(a)
to draw air into the workspace and to prevent or minimize the escape of air contaminants out of the workspace, and
(b)
to allow an employee to conduct physical, chemical and biological manipulations inside the workspace.
“operational face opening” means an opening in a laboratory fume hood through which an employee may conduct work inside the hood.(ouverture frontale opérationnelle)
“sash” means a vertical or horizontal panel on a laboratory fume hood that defines the operational face opening and provides a protective barrier between the employee conducting work inside the hood and the contents of the hood.(fenêtre coulissante)