A fume hood, also known as a fume hood, is a large piece of equipment in laboratories, especially chemical laboratories. The purpose is to reduce the exposure of the experimenter and harmful gases. Complete isolation requires the use of a glove box. The fume hood is the primary barrier to protect personnel from toxic chemical fumes. It can be used as an important safety support device, such as the failure of chemical experiments, the discharge of harmful gases from chemical fumes, dust and toxic gases, and the protection of workers and the laboratory environment.