Air Flow Balancing Liner Grilles are placed at the uncluttered looking walls and false ceilings for supply and return of air. These Liner Grilles are effective in balancing the air flow of the room by sending the impure air outside and inserting the fresh one inside. These Liner Grilles are available in any length in sections of 1.2 or 2.0 meters with perfect alignment between sections. Air Flow Balancing Liner Grilles are widely utilized in large offices, public areas and various commercial areas.