picture lab laboratory fume hood, fume hood policy, fume hood pdf, fume hood lab report, esco fume hood, fume hood calibration, how to make fume hoods, Fume Hood Laboratory fume hoods are laboratory devices designed to carry out several experiments using certain chemicals in a chemical reaction study. Chemicals in the laboratory are substances that are dangerous if directly exposed to the limbs. Therefore, fume hoods are designed with special ventilation which can reduce the chemical reactions in the form of gases or other so as not to spread into the air and endanger the environment.