The largest producer of dust is humans. We constantly shed skin particles, which over a period of a few days covers everything in your home with a thin layer of dust.

And, though you may find it difficult to believe, all heating systems circulate dust particles. Even an oil-filled electric radiator circulates dust particles throughout the area via convection. The cooler air close to the floor is drawn toward the radiator's fins, heated, rises toward the ceiling, then moves outward toward the walls. As the air cools it falls back toward the floor, where it is again drawn across the dusty floor, picking up minute particles along the way before being cycled once again. It's a constant process.

The cleanest studio on the world is heated and cooled with something that moves air. If you move air, you ultimately move dust along with that air--this ain't rocket science.

Gary