In an Industrial Environment, proper ventilation should be provided to maintain the efficiency, health and safety of workers. The indoor environment of any industries may have sources generating heat, fumes, VOCs , dusts etc..that are harmful to workers and it should be controlled and kept within allowable limits set by OSHA (Occupational Safety & Health Administration) and Industrial Hygienists standards to minimize absenteeism of workers, Increase productivity, avoid explosion and fire at workplace.