The installation location of the fume hood and fume hood should be selected according to the content of the experiment, the type, material, shape, etc. of the fume hood, but there are several items that must be considered. 1. In the air-conditioned room, a wind-filled fume hood should be used, a fume hood with air volume control or a non-pipeline fume hood with activated carbon filter to filter toxic chemicals; 2, the use of drugs should also be considered, because the use of organic or other special reagents when experimenting, should fully consider the control of wind speed; 3. When there are radioactive materials, perchloric acid experiments, and equipment with heat source, the power of the ventilator and the inlet air velocity of the fume hood should be considered; 4. When conducting experiments with large equipment: Consider the internal dimensions and leave the necessary space for exhausting; Sampling Cotton Swabs,Nylon Flocked Swab,Small Foam Tip Swab ,Cotton Tipped Swabs Hunan Kangfutai Medical Devices Co., Ltd. , https://www.3kfut.com