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        1. Home
        2. Products
        3. Air Control
        4. Dampers
        5. Life Safety Dampers
        6. Combination Fire Smoke Dampers
        7. 1.5 Hour Fire Rated Dampers
        1.5 Hour Fire Rated Dampers
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        • Round Combination Fire Smoke Dampers https://catalog-api.greenheck.com/api/category/en-us/144
        • Rectangular Combination Fire Smoke Dampers https://catalog-api.greenheck.com/api/category/en-us/141
        • Out of Wall Fire Smoke Dampers https://catalog-api.greenheck.com/api/category/en-us/142
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        Damper Selection Guide
        Which damper best fits the application? Greenheck’s damper interactive selection guide removes the guesswork. Find blade type, velocity, pressure, AMCA listings, submittals, drawings and more, all in one easy-to-use format.
        LEARN MORE

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        1.5 Hour Fire Rated Dampers

        Combination Fire Smoke Dampers are UL 555 and UL 555S classified.

        The 1 1/2 hour fire rated combination fire smoke dampers are used in walls, floors, or partitions with a fire resistance rating of less than 3 hours.

        Round Combination Fire Smoke Dampers

        Round Combination Fire Smoke Dampers

        Round combination fire smoke dampers function as both a fire damper (1 ½ hour rating) and a smoke damper (UL leakage class of I or II).

        VIEW Round Combination Fire Smoke Dampers
        https://catalog-api.greenheck.com/api/category/en-us/144
        Rectangular Combination Fire Smoke Dampers

        Rectangular Combination Fire Smoke Dampers

        Rectangular combination fire smoke dampers function as both a fire damper (1 ½ hour rating) and a smoke damper (UL leakage class of I, II or III).

        VIEW Rectangular Combination Fire Smoke Dampers
        https://catalog-api.greenheck.com/api/category/en-us/141
        Out of Wall Fire Smoke Dampers

        Out of Wall Fire Smoke Dampers

        Out of wall combination fire smoke dampers function as both a fire damper (1½ hour rating) and a smoke damper (UL leakage class of I or II).

        VIEW Out of Wall Fire Smoke Dampers
        https://catalog-api.greenheck.com/api/category/en-us/142

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