Back Draft Shutters (BDS)

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Picture of Back-draught Shutter / Non-return

Back-draught Shutter / Non-return

Allows airflow in only one direction, preventing heat loss or backflow through intermittently used ducts.

Picture of PVC Back-draught Shutter / Non Return

PVC Back-draught Shutter / Non Return

Airstream-operated and designed for surface mounting.