The home airflow journal 715

Indoor air has a way of disguising itself. A home can look spotless and still carry cooking residue, dust, pet dander, mold spores, combustion particles, and the lingering chemistry of cleaners, paints, and furnishings. People often notice the air only when something changes, a bedroom starts triggering congestion, a renovation leaves a gritty film on shelves, or an office develops that stale, tired smell that never quite goes away. By then, the problem is usually not one t