The difference between biens clean air type fume hood and common fume hood

As more and more laboratory users begin to choose ductless fume hoods, the manufacturers of clean air medicine storage cabinets summarize the following differences between the new fume hoods and the traditional fume hoods: 1 Whether they are discharged: the clean air fume hoods do not need external pipes, have built-in fans and filters, and directly extract waste gas for adsorption and filtration; The general ventilation cabinet needs to be connected to the pipe and discharged to the outdoor, and the general fan is on the roof; 2 Work quantity: one equipment of the biens clean air type ventilation cabinet can be installed in half an hour, and can be used after the power is plugged in; the general ventilation cabinet needs to be started from the design, with holes, installation, pipeline laying, and roof mounted fan; 3 Energy consumption: The power consumption of the clean air type ventilation cabinet is from 30W to 120W, and the energy consumption is almost negligible; the power consumption of the fan of the common ventilation cabinet is from 1500W to 10000 watts, and the energy consumption cost is huge; 4 The air-conditioning air consumption of the clean air type ventilation cabinet is internal circulation, and the air does not need to be discharged to the outside, and there is no need to add air-conditioning equipment and air-conditioning air consumption; According to the different exhaust air volume, the common ventilation cabinet will exhaust the indoor air conditioning air, and the corresponding air conditioning equipment needs to be added, which may lead to the indoor negative pressure and affect the working environment; 5 The noise of the bience clean air type ventilation cabinet is only 41 dB, which is very quiet and will not have any impact on other operations in the laboratory, and can ensure the accuracy of the balance weighing of 1 / 100000; The noise and vibration of the common fume hood are large, so it can't be weighed by a balance; 6 The service life of a biennis air purifying fume hood can be used for more than 10 years under non extreme conditions, which is convenient to move and can be reused in the laboratory; the common fume hood is easy to age, so it's not suitable to be reused by renovating the laboratory; 7 Maintenance The maintenance of biens fume hood is simple, only the lines and switches need to be checked, so it is convenient to check; the common fume hood is difficult to check and difficult to check because it involves the design of air ducts, lines and the whole building; most of the above are the advantages of clean air fume hood, of course, the common fume hood also has the advantages that the new fume hood can't match 1 Applicability The common fume hood can be suitable for any dose and any frequency of experimental operation; the pure air fume hood is only suitable for the operation of small and medium dose; 2 The consumable cost of the pure air fume hood has some consumable cost, although it can fully offset the energy consumption cost of the exhaust fume hood, and it can be accumulated; after the installation of the common fume hood, there is no consumable cost;