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Furniture laboratory fume hood is an essential one. In the laboratory played exhaust and ventilation effect. Fume hood structure is up and down style, its top vent, the fan can be installed. OTC has baffles, circuit control touch switches, power sockets, windows with tempered glass, left and right or up and down. For people to operate. Under the cabinet table style using the experimental side, there are the table above, the following is the cabinet. Countertop and faucet can be installed small cups. Local fume hood from a variety of materials, steel, wood, all wood, aluminum, wood, steel, PVC structure, with its countertops are in direct contact with the operator, the solid core physiochemical board, stainless steel, PVC, ceramics and other materials. Legacy Multi fume hood made of wood used, but mostly for modern epoxy resin coated steel manufacturing. Common cabinet 1000,1200,1500,1800 and 2000 mm width several specifications, deep 700-900 mm, height 1900-2400 mm. 1-3 for personal use. Fume hood wall installation. Intermediate movable up and down in front of the transparent door (mostly glass), opening height is generally 100-600 mm. Face the door to experiments carried out with connection pipes, sewer, power, vacuum pumps, gas lines and other experiments required, there are lighting with protective cover. Air from the front of the cabinet above the exhaust fan pulled out, or through pipes lead to elsewhere (called full ventilation), or filtered recycled use (Be ductless ventilation). Most fume hoods (1) displacement is too small (2) in front of the glass door open too much time alerts to remind the operator attention, the general operation of the glass door fully open mouth wind speed not less than 0.5m / s, Internal exhaust fan speed and light switches have adjustable. Use when people stand or sit on the front cabinet will try to lower the glass door, through the door into his hand inside the experiment. Because the exhaust fan through the open door inward suction, under normal circumstances not a large spill of harmful gases.