1, air conditioning ventilation rate

Although more air exchange is better, it will lead to an increase in the size of the equipment, especially when dealing with the external atmosphere and heating or cooling, which will cause a huge economic burden. Therefore, the amount of air exchange should be limited to the minimum required amount. There was a significant relationship between the air exchange rate and smoking in the absence of job contamination and only worker contamination. The air exchange rate is 10-15m?/(h · ·(H ·), slightly more 20-25m ³/(h ·(H ·), if smoking is less than the hourly or "occasional smoking" level. For entertainment and gathering places where each person smokes more than 2 cigarettes per hour, the minimum required air exchange rate is 40-50m ³/(H · ·(H ·), and the appropriate air exchange rate is about 1.5 times. Generally, the standard is 35m ³/(H · person).

2, Recommendations for Various Situations

When the indoor personnel are uncertain, please obtain the air exchange rate per square meter of ground area from the following table [m sand/(h ·(h ·(h ·(H ·))):