1. It is good to open the window to the west of the self-built house for lighting. Especially in summer, the sun can shine directly all afternoon, and there is plenty of lighting.
2. When indoor windows are opened to the west, there are usually some unavoidable cases of sunbathing in the west, and the indoor temperature of sunbathing in the west is usually about 3 degrees higher than that in his room in summer, and it will be very hot in summer.