1. The natural ventilation air inlet should be set on the side of the prevailing wind direction in the local summer, so that the natural ventilation can be used to the maximum extent and for the longest time.

2. The exhaust port should be as close as possible to the source of harmful substances or areas with high concentrations of harmful substances, which can quickly remove harmful substances from the room.

3. In order to improve the cooling effect of natural ventilation in summer, the height of the air inlet side window from the ground should be reduced as much as possible, generally not more than 1.2m, and 0.6~0.8m in the hot south. The air inlet window is best to use the vertical central axis window and the split window with low resistance to direct the airflow into the work area.

4. The distance between the natural ventilation area and the opening of the outer wall or the roof skylight should be relatively close. The area of ​​unobstructed ventilation openings should not be less than 5% of the floor area of ​​the room, of which: the effective area of ​​ventilation openings in living and working rooms should not be less than 5% of the floor area of ​​the room; the effective area of ​​ventilation openings in the kitchen should not be less than the floor area of ​​the room. 10% of the area and not less than 0.60㎡. If the rooms in the inner area of ​​the building are naturally ventilated through the adjacent rooms, the ratio of the ventilation opening area to the floor area of ​​the room should be increased on the basis of the above. The specific circumstances of each place should be implemented in accordance with the relevant local standards.