Industrial Purpose Anti- Corrosive Bypass Fume Hood operates with a constant exhaust volume. The Hood is designed so that as the sash is disclosed the bypass opens and suction is redistributed between the sash opening and the bypass thereby eliminating excessive velocities at closed sash position. The Hood is corrosion resistant and has high tensile strength. Industrial Purpose Anti- Corrosive Bypass Fume Hood is easy to operate and requires low maintenance.