Ductless or ducted fumehood with improved front sash closure

摘要

A novel front sash closure for a fumehood of the sort comprising a workspace defined by a frame and accessed by a front opening, the front sash closure comprising:a transparent fixed pane and a transparent hinged pane;wherein the transparent fixed pane is securely mounted to the frame of the fumehood so as to partially cover the front opening of the fumehood, whereby to reduce the size of the front opening of the fumehood to a working opening; andwherein the transparent hinged pane is hingedly mounted to the frame of the fumehood intermediate the working opening so as to be able to selectively cover a portion of the working opening.