How does dust get everywhere?

Question

You go into a room that hasn’t had folks in it for 10 years and there is dust everywhere. I thought it was skin cells but obviously not.

Even rooms with no access to the outside have dust.

In: Mathematics

Answer 1

Dust comes in through the air vents but it also comes down through/around fixtures from the attic. My new house has spray foam insulation on the rafters so it doesn’t have the typical fiberglass or worse cellulose insulation making dirt in the house. This house is easier to keep clean and doesn’t get dusty as fast as my older house.