Hello, I posted this to the HVAC/R group but looking around the forum I think it may belong here. I am a relatively new engineer and I am trying to design an exhaust fan for a fume hood. I am having trouble figuring out when a "laboratory" exhaust fan is required and if bypass air is required for dilution. Our client will be using Methylene chloride and potassium chloride; I have the data sheets and evaporation rates (relative to butyl acetate) but I can't find information on when a proper laboratory exhaust fan and bypass air is required. I have searched for a few hours online and through ASHRAE HVAC applications and the industrial ventilation manual but I'm having a tough time coming up with answers. If anyone can point me in the right direction, that would be great! Thanks!
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