Pacific HVAC Engineering offers a full range of non return dampers to match duct and roof mounted fans. Dampers are designed to provide an effective back draft seal in ducted systems. These dampers can be installed either vertically or horizontally.

NRD and DND series dampers have flaps fabricated from extruded PVC. Frames are fabricated from anodised aluminium with polymer corner joints. RSK series dampers are fabricated using rolled galvanised sheet with aluminium butterfly flaps.

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