Duct registers.

[PVR]

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.

 

[PVR]

Yes, I am aware of the balancing problem and I have taken it into account. My basement has four registers on the plenum and I shall be replacing two of those with other registers of the same total area. My problem is the registers themselves.

Peter.