Originally Posted by
NCHeat
They both have an issue if you ask me. I would make each run originate from the main trunk line. When you tee or branch off secondary trunks you always end up with an airflow issue out of that run. It's a small enough space that anything you do will be fine as long as you size the duct correctly
Plus one. ^^^^
The first layout not only has what is described above as a problem, it uses those airflow killing triangle boxes. If you're using flex duct for this project, you may really regret employing those triangles.
Psychrometrics: the very foundation of HVAC. A comfort troubleshooter's best friend.