Insulated Box with Fire Damper
- Available in R4, R6, & R8.
- 210IN4; 210IN6; 210IN8
- Fire dampers are typically required when a duct passes a fire rated barrier (walls, partitions, or floors). Uses a heat fusible link that, when activated, closes and impedes the migration of high temperature into and through the duct system. Equivalent length supply 35'. Equivalent length return 10'.