I recently replaced my attic airhandling unit due to its age and the mold/dust living in it etc.. The distribution system on the supply side is "radial" in that there are 4 10" flex trunks that feed into ductboard triangles with further split from there.
I Opted to replace the Ductboard supply and return boxes with lined metal boxes, and I would like to eliminate any ductboard remaining in the system.
What are my options in replacing the ductboard triangles? New ductboard triangles? galvyTri-Wyes? fabricate some Metal Triangles?