 
                        
Slimline frame profile where narrow clearances are required.
                                        
Meets all UL and NFPA requirements for Primary Fire Dampers and carries a UL555 classified fire damper label.
                                        
Approved for use where ducts penetrate partitions with fire resistance ratings of two hours or less.
                                        
Gravity operated for vertical installation.                                        
3 hour rating for use in fire barriers rated four hours or less.
                                        
Optional installed duct sleeves available.
                                    
| Minimum | Maximum | 
|---|---|
| 6" x 6" | 36" x 24" |