I am finishing my basement. One of the areas will be a family room. There are 6 inch circular ducts running between some joists. I shall install a drop ceiling using the Grid Max/Ceiling Max system. This will give me a tiled ceiling about 2 inches below the joists. I shall need heating /air conditioning in the family room.
Are there any registers available which I can attach to a circular duct with a maximum protruding distance from the duct of 3 inches? I have seen small circular registers which adjust by rotation of a central knob but I don't know where. Can anyone help?
Peter.