I've been in the attic quite a bit before the summer, and every time I look at the duct work, I keep wondering if some crazy/lazy person did it. For example, I have a flex duct running from the main trunk that does a 180 degree turn around a roof truss simply because the register box opening faces 'away' from the trunk.
The photo below shows the way the return duct is routed, bent around a roof truss.
My question is, should I reroute it so it goes straight up? That is, where the yellow arrow is pointing.
To explain a bit further, the green rectangle is an outside corner, and there is a half wall (from the perspective of the attic) that runs in the direction of the red arrows, up to the point where the duct lies on top of the ceiling.
The diagonal red arrows also happen to point to the sad insulation job that is clinging on for dear life against the drywall. I plan to fix this at some point.
To continue the first question, if I were to run it straight up, what would be the best way to insulate the wall (and/or duct together)?