www jst umn edu Fume Hoods Fume Hoods

www. jst. umn. edu Fume Hoods

Fume Hoods, Proper Use • The hood is NOT a waste disposal mechanism. • All containers in the hood must be closed • Do not store chemicals or unnecessary apparatus in the hood. Exhausts into the environment www. jst. umn. edu Source: Ph. D Comics http: //www. phdcomics. com/comics/archive. php? comicid=1023

Fume Hoods, Proper Use • Check the air flow daily. Acceptable range is 80 to 150 linear feet per minute, at the designated sash opening (usually 18 inches). – Report malfunctions to Facilities Management (612 -624 -2900). • Ensure baffles are not blocked. • Raise equipment off floor so air may pass beneath it. • Keep all apparatus at least 6 inches back from the face of the hood. • Do not place electrical receptacles or other spark sources inside the hood when flammable liquids or gases are present. • Keep sash closed as much as possible. – Work behind horizontal sliding sash if one exist, and if there is a chance of explosion, eruption, or splashes, etc • Minimize foot traffic in front of the hood. www. jst. umn. edu UMN, Duluth. General Safe Work Practices for Laboratory Fume Hood. Last Update: March 3, 2009 http: //www. d. umn. edu/ehso/safety/Fumehood_sop. pdf. Equipment-Specific

Fume Hood, Proper Setup • Locate equipment as far to the rear as possible, without blocking the lower slot in the rear baffle. • Never operate equipment closer than 6” behind the plane of the sash! Bad Better Best • Green indicates ‘SAFE’ airflow • Amber light indicates warning • Red indicates a face velocity failure and ‘ALARM’ will activate • Press ‘ENTER’ to mute the alarm while you set up equipment in the hood. www. jst. umn. edu Innovative Laboratories and U of MN DEHS, Kewaunee Dynamic Barrier Low-Flow Fume Hoods. http: //www. chem. umn. edu/services/safety/fumehoodorientation. ppt

Fume Hood, Real Examples Close the hood sash! www. jst. umn. edu Work 6” back from the sash!

Fume Hood, Real Examples Equipment elevated to promote air circulation Clutter

Fume Hood, Real Examples Solvent evaporating into the environment!

Fume Hood, Real Examples Researcher name and contact information. Reaction schemes alert coworkers of reactions that are in progress.