When installed, fume hoods should be inspected in accordance with the American Society of Heating. It is the responsibility of the office of the university architect or facilities management to arrange for testing and intial certification of a new hood.
An air balancing specialist is hired to ensure that containment meet design criteria and taht supply and exhaust air flow are in proper proportion to establish a negative pressure diferential between the lab and the outside corridor. Exhaust flow must be greater than supply to create air movement from the hall into the lab to contain airborne contaminants.
Operating performance: The location of the hood affects its efficiency. Ideally, fume hoods should be located in an area of minimal traffic. When a person walks by a fume hood, turbulence can be created causing contaminants to be drawn outside the hood. Also, if the air diffuser is located directly above the fume hood, air turbulencemay be created causing contaminants to escape into the room. The air flow into the room has an effect on the fume hood. All doors and windows shold be kept closed to maintain the negative pressure of the lab with respect to the outside corridor. This ensures that any contaminants in the lab will be exhausted through the fume hood and not escape into the hallway.
work surface height
inflow air velocity
PVC, 4 meters
PP built in centrifuge blower, speed adjustable
motorized, 5mm toughened glass
AC 110/ 220V ± 10% 50/60 Hz
1.0mm cold rolled steel with epoxy resin coating
high grade melamine board with good acid and alkali resitance function