The soffit pictured encloses a supply duct in the media room looking east, the soffit and supply duct runs on the north interior wall and the west
wall of the media room. The entire assembly was netted and dense packed along with the vaulted ceiling. R Value of the duct insulation in this application is R 13. The duct is in conditioned space and did not need to be insulated; the issue was labor savings on insulation of the vaulted ceiling.