Hot pot restaurant exhaust air volume and fresh air volume are also not allowed. According to relevant public information: press > to obtain fresh air volume; 20CMH/ person (per capita usable area =2 is calculated according to the dining area), and the exhaust air is considered as 80% of the fresh air volume. The dining tenant's kitchen (the dining tenant's area is less than or equal to 200m2), the designed ventilation frequency or exhaust volume (times) is 80, the kitchen area is determined according to the dining area of 1/3, and the kitchen height is calculated according to 3m.