The Flow Hive Or Full Flow Hive is a complete bee Hive without bees - 2 deep boxes one for brood and the other the Flow box
The Flow Super is the Flow box which is the same sizes as the Deep/Brood box but for the Flow Frames. Flow Hive Frames are deeper than the normal Shallower Medium Super’s and wider than the normal frames.
It’s all explained here
http://forum.honeyflow.com/t/building-the-new-hives-when-they-arrive/443/9?u=valli