Ventilation systems for organic synthesis laboratories represent the highest-cost, lowest fault-tolerance, and most difficult-to-retrofit component of full laboratory fit-out works. Their core design objectives are as follows:
1.Timely exhaust flammable and toxic VOC vapors;2.Maintain stable negative indoor pressure to prevent odor leakage to adjacent areas;3.Keep the concentration of organic solvent vapors inside ductwork below the lower explosive limit (LEL);4.Avoid drastic fluctuations in indoor temperature and humidity caused by high-volume exhaust air.
The complete ventilation system consists of six core subsystems: local exhaust ventilation (primarily fume hoods), general room exhaust, makeup air supply, duct piping, waste gas treatment, and automated interlock control. Each subsystem carries unique challenges in design and construction.