BAS-CVS Corridor Dampers are intended for use where air ducts penetrate or terminate at horizontal openings in the ceilings of interior corridors, as defined in the IBC, or where permitted by the authority having jurisdiction.

Corridor dampers are manufactured with “3V” type blade have been evaluated and approved for both a fire-resistance rating of 1-hour (UL555), and a Class I or Class II leakage rating as defined under Smoke Dampers (UL555S). Leakage ratings of corridor dampers are determined at an elevated temperature 350°F.