What is the minimum ceiling clearance?

I have a low ceiling. What is the minimum distance from top of door to the top of hardware when installed?
TopLine 71-222 Single Sliding Door Hardware , 8' Rail · 詳細

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  • PRO
    Custom Service Hardware, Inc

    Hettich 71-222 mounts to the ceiling or underneath an header, the weight capacity is 150 lbs. please see attached specs.