If the door of a family faces north, the lighting is very bad, because the back is to the sun, so the whole lighting will be poor, and the whole family may look gloomy. This kind of family is often oriented in the wrong direction, so it is easy to be dark and humid inside, which is not good for people's health.
Of course, the air in a house with a north gate is often not particularly ventilated. The air in the whole house is not good, and the back may be turned to the wind, so the air in the room is not particularly good and the lighting is not good, so the whole room will look dark and humid. In this case, it will be very bad for people's health and luck.