2" Round Horizontal/Vertical Mount Fire Damper 2550-12 Smoke-Fire Damper Louvers designed with rolled rib

Louvers designed with rolled rib for maximum strength and rigidity

4-way flush step down steel diffuser

904 - Double Deflection Adjustable Aluminum Blade Grille For a 24" x 4" Duct Opening  (front blades parallel to shortest dimension)

3 hour fire resistance rating

Designed for high volume air delivery

2" Round Horizontal/Vertical Mount Fire Damper 2550-12 Smoke-Fire Damper Louvers designed with rolled ribStandard Features Spring actuated curtain type fire damper with 2 1 4" round connection for horizontal or vertical mount 2" thin line roll formed out of airstream frame Designed for use in walls, floors and partitions with fire resistance ratings of 2 hours or less (for ceiling application, see 2700 series) UL listed and tested in accordance with UL Standard 555 1 1 2 hour fire resistance rating Building materials rated 2 hours or less CSFM California