If you replace the existing insect screen with a dust screen, the ventilation is not good, so you can always feel stuffy.

The roll screen is attached to the dust screen every time you open and close it
As all kinds of fine dust fall by friction
It can enter the room and filter replacement is difficult.

The nanofiber mesh is made up of nanofibers 1/1000th the thickness of a hair entangled like a spider's web when magnified under a microscope. It is so weak that it can be corroded by sunlight very easily and become another fine particulate matter.

Since the dust screen blocks fine dust and serves the purpose of ventilation, when it gets wet with rainwater, a water film is formed and it does not function properly, and when the rainwater dries, dust remains and becomes polluted.