The effectiveness of the use of all-steel fume hoods in laboratories, in addition to correct design, is also closely related to reasonable use and maintenance. Therefore, the following points should be noted:

       1. During the experiment, the experimental device that produces harmful substances should be placed in the cabinet where the operating opening of the cabinet is greater than 150MM to avoid the spillage of harmful substances;

       2. The experimental device of the product should not block the exhaust slits;

       3. After the experiment is completed, the fan should not be turned off in time. It must wait 3 to 5 minutes before turning off;

       4. The product should not be used as a storage cabinet;

        5. The interior surface of the cabinet should always be kept smooth and airtight, and it should be cleaned and cleaned regularly. If there is any damage, it must be repaired in time;

       6, ventilators, air ducts and related accessories should be inspected regularly.