This was a commercial water loss in Toledo, Ohio. We used the injecidry to direct forced air into the cavities of the wall to dry the structure.This Type of system is used in water damage restoration and restorative drying work. It is specifically designed for structural cavities like those between studs in walls, between joists in floors and ceilings, under and behind cabinets and other built-ins, above door and window headers, and many other areas that are difficult to access. The system works because airflow across wet materials is a basic principle of drying.