3, the filtering effect. It depends on the paint the model of the roof of cotton, and general repair shop eu5 and eu6 two models, you can paint room in the room with the upper part of the solar light irradiation, usually per square meter of very fine dust should be less than 5;

3, filter effects. You want to look at the painting of the roof unit model, a general repair shop using EU EU 5 and 62 of the models, you can use paint rooms in the room when the sun light exposure, usually upper tiny dust per square meter should be less than 5;