There are 3 options to record measurements for height:
Clear Opening
You measure the opening that you want to clear, this is sometimes called inside measurement. Basically you record the height that you want to shutter to clear.
System will add for the the height of the the top and bottom track.
Finished Height
This is rarely used. The measurement recorded goes from to of the body of the rail to the bottom of the body of the rail. The measurement does not include the flange.
Flange to Flange
This measurement type includes all flange height, so it represents the measurement from the very top of the shutter to the very bottom of the shutter including all flange dimensions
Important: Not all flanges are the same
Please see verify the drawings for variation of the flange dimensions based on the track
