Through flow usually occurs in gaps between buildings, high walls, rooms with opposite doors and windows or similar passages. Due to the different atmospheric temperatures on both sides of air circulation, air pressure leads to the rapid flow of air, and it is also hindered by buildings, gaps, doors and windows, corridors and so on. Provide a circulation channel for the rapid circulation of air. The wind direction is generally from the sunny side to the shady side, and the wind speed depends on the temperature difference between the two sides. The greater the temperature difference, the greater the wind speed, mostly in spring and autumn.
This kind of wind appears in the house feng shui. It is easy to understand that there are three doors that are opposite. "Residential geomantic omen" says that the bathroom door can't face the entrance door, which is easy to slip money for reference.