Cleatech's High clearance construction laboratory fume hoods (often referred ducted exhaust hoods or chemical fume hoods) available from 18″ to 72″ width, including spill chemical tray/ polypropylene worksurface, ideal for applications require exterior ducting for exhaust and need full visibility of the fume hood interior. These fume hoods can be ordered with up to two optional fan modules with adjustable air speed. Ducted fume hoods are ideal for soldering or chemical processing that requires the removal of potentially hazardous fumes with low-level corrosive vapors. Material available in Polycarbonate, non-dissipative PVC and ESD PVC construction.