2" Round Horizontal/Vertical Mount Fire Damper 2550-12 Smoke-Fire Damper 1 1/2 hour fire resistance

1 1/2 hour fire resistance rating

450 Series Submittal

4-way flush step down steel diffuser

SD52 Submittal Drawing

Designed for high volume air delivery

2" Round Horizontal/Vertical Mount Fire Damper 2550-12 Smoke-Fire Damper 1 1/2 hour fire resistanceStandard 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