If every household is connected by drops of water, it is really difficult to identify that the Lord suffers from eye diseases, and the other room damages the eldest son, just like a lingering disease. Where there are heavy hills in front of the house, the owner miscarries and the fire can't escape. These subtle statements show that houses should have ventilation spacing, orientation is conducive to ventilation and so on. Under normal circumstances, indoor and outdoor air is constantly exchanged, which is the ventilation or ventilation of the room. According to Feng Shui, the distance between the front and rear rooms is calculated by "step", and one step is auspicious.
Residential rooms must be properly ventilated to improve indoor microclimate, reduce the content of carbon dioxide in indoor air and the concentration of harmful gases from indoor sources, and reduce the number of pathogenic microorganisms and dust. Natural ventilation is generally used in residential buildings. Natural ventilation uses the natural flow of air to achieve the purpose of ventilation, which is more economical and applicable. However, due to the direct influence of external weather, the ventilation is not stable enough.
The natural ventilation in the house is formed by the wind pressure of the air. Wind enters the room from the air inlet, and indoor hot air or harmful substances are discharged from the air outlet to achieve the purpose of ventilation. In reality, the density between buildings is too high, or the dominant wind direction is not considered well, or the doors and windows are too small, which requires mechanical ventilation. If there is no good natural wind in the kitchen and bathroom, it is best to use mechanical ventilation and install exhaust pipes, otherwise it will not only affect the geomantic omen in the house, but also damage the health of the people in the house.