Taking a workshop of 1000 square meters as an example, with a height of 4 meters, the workshop has a volume of about 4000 cubic meters. The design standard is calculated according to the standard of three special workshops, and the ventilation standard is 60 times/hour. The total amount of exhaust air required for the first floor is about 4000X60=240000 cubic meters. If 126 * 126cm glass fiber reinforced plastic negative pressure fans are designed and installed (the exhaust air volume is 42000 cubic meters/hour), the number of ventilation equipment required is about 240000 divided by 42000=5.7 sets, According to this standard, the air in the workshop can be replaced once in about 1 minute, and the stuffy, peculiar smell, smoke, etc. generated in the workshop can be discharged outside the mail room in a short time, forming a ventilated and convective environment.
