Prefco Multiblade Fire Dampers – Series 5000
Series 5000 multi-blade fire dampers are UL555 fire dampers that can be either static or dynamic rated. When applied in a dynamic (fans on) system this damper has been evaluated with bi-directional airflow, and is rated to 3000 FPM and 4″ static pressure in compliance with UL555 6th edition.
