Background: We're working on remodeling our living room (1st floor of 2 story house), and are attempting to remove a load-bearing wall. We've got everything designed as far as structurally replacing the wall (i.e. the framing and beam - going to be a 10" LVL flush mounted, aka, recessed into the floor joists).
Anyways, the wall we're removing is currently used to house hot and cold ducts for two upstairs bedrooms, as well as the vents for the living room itself. The living room vents are no problem, as we can just relocate them in the unfinished basement. However, I'm unsure how to best relocate the ducts for the bedrooms.
One end of the beam is an exterior wall, but the other end is a closet. We already have to build a false back to the closet to house a drain pipe, and I can send the ducts up through that wall as well. However, there would then be about 6 or 7 floor joists between the vertical duct (going to the basement) and the horizontal ducts (going to the heat registers).
What's the best (i.e. most hidden, least demolition required) method for building a duct from A to B?