Insulated Side Mount Box with Fire Damper
- Available in R4 & R6.
- 213IN4; 213IN6
- 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 60'. Equivalent length return 30'.