What's the difference between a porch and a screen?

The difference between partition and porch: partition is a wall and airtight. Generally speaking, it belongs to light wall, which is not load-bearing, and is mostly used for indoor space division. The partition is continuous, which is used for indoor function partition, and has the requirements of lighting and ventilation, and is mostly used between the dining room and the living room, or between the porch and the hall.