Complex sentence: This air is pulled through a filter where airborne particles such as dust and lint are removed-in fact, sophisticated filters may remove microscopic pollutants as well, then it's routed to air supply ductwork that carries it back to rooms.
Split into simpler sentences: This air is pulled through a filter where airborne particles such as dust and lint are removed. The filtered air is routed to air supply ductwork that carries it back to rooms.