Airflow Direction Incorporated’s BALL-IN-THE WALL & BAULIN-TUBE® indicator shows if your room is under proper negative or positive pressure. The ball rolls in the direction of airflow and incorporates a built-in failsafe feature.
We are there when your project requires planned, managed, and documented high quality to exacting global standards, need high-performance teams on mission-critical projects. When your project is complex, high-visibility, and carries significant risk.
