Access Panel removable to access filter ducting connections, plumbing & electrical services from a single point electrical box, 115V/60Hz AC operation. Vapor proof incandescent light fixture with light switch on left column, all factory installed.        Air Flow Monitor continuously monitors face velocity airflow, comes standard with analog, digital available. Meets ANSI and OSHA requirements.        Full 30” Viewing Height with 28.5” Sash opening height for ease of access and viewing tall apparatus setup. Sash is 3/16 thick tempered safety glass, vertical moving with single point counter balanced, contoured sash handle for efficient air flow and ease of movement.        Sash Stop located at 1/2 open to reduce airflow 50%, standard equipment. Cat. No. 51651        VaraFlow Baffle System Maintains uniform airflow thru the VaraFlow Baffle System to bell shaped exhaust collar outlet.        Angled Picture Frame Opening Efficient air entry into fume chamber. Angle mounted service fixtures are easily viewed and user controlled.        Epoxy Work Surfaces Solid Epoxy Resin, dished to contain spillage. Color: Black U.L. tested & Certified to 1805 Classification.