1. Workshop leader × wide × high × Ventilation times ÷ set number of fans = ventilation volume of fans. Select one of the selected fan air volume series that is greater than the "fan ventilation air volume" calculated above. From an economic point of view, it is sufficient to select a medium and small one greater than the "fan ventilation volume".
2. There are two methods to calculate the total ventilation volume. One is to change several times per hour according to different places; The other is to get the total gas volume according to the gas volume that people need to change per hour, and the landlord can choose by himself.
1. Calculate the required number of sets from the number of people in the room:
Ventilation rate × Number of people ÷ air volume of ventilator = number of sets
2. Calculate the required number of fans from the indoor ventilation times:
Indoor volume × Times / h ÷ fan air volume = number
