Planning and designing laboratory ventilation systems for the safety of the users and protection of the environment

The laboratory environment may generate harmful chemical gases, vapors, particulates and biological agents, those substances must be continuously removed from the laboratory. The first section of this paper analyzes the requirements for minimum air exchange in a laboratory, as a result of an extreme situation generated by an accidental spill of a hazardous liquid.The second section studies the level of concentration of flammable chemicals in the exhaust system. An extreme air flow situation is also analyzed.