In laboratories, laboratory fume hoods have also become one of the important laboratory furniture, whose main function is to safeguard the safety of the users circumvent the pollution of the surrounding environment. Laboratory bench cabinets are designed to clear away corrosive chemical gases toxic fumes during chemical experiments.

Why does the fume hood need variable air volume (definition: the volume of air circulating per unit of time) operation control as follows:

Remote extractor fan pumping force through the exhaust pipe in the interior of the interior end of the fume cupboard cavity to produce a negative pressure relative to the room air pressure for the local space, the staff stand in front of the laboratory fume cupboard operation control window hand into the cabinet to implement the operation of the chemical operation control, this time the operation control of the harmful gases produced by the top of the fume cupboard smoke through the venting mouth is the extractor fan the exhaust pipe suction, so that the harmful gases fumes do Escape the fume hood window be inhaled by the staff at the window, into the room then overflow into the room stained corridors neighboring offices. Laboratory workbenches also have some workbenches are stainless steel, the desktop needs to lay a table mat, table mat through the contact line connected to the earth, play the role of static electricity discharge.

Laboratory fume hoods installed in the local exhaust equipment, such as fume hoods, universal hoods other non-standard production of local exhaust equipment, etc., the fume hood is one of the important laboratory local exhaust equipment, has been in accordance with existing industrial standards for large-scale production.