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Static 3 Hour Rated Dampers
UL 555 3 hour fire rating
Static-rated-fire dampers used in HVAC systems automatically shut down in the event of a fire emergency. These are UL 555 classified with a fire-resistance rating of 3 hours.
Static-rated-fire dampers used in HVAC systems automatically shut down in the event of a fire emergency. These are UL 555 classified with a fire-resistance rating of 3 hours.