I'm doing some remodeling in my house and would like to finish the basement ceiling with sheetrock replacing the old drop ceiling. The only problem is the ducts both run on one side of the room as illustrated in the picture. I'd like to reroute the return duct around the opposite side of the room so I can build a nice even soffit throughout the room.
Is it ok to reroute the return duct in such a way? Will adding additional length and two extra 90 degree bends to the duct cause any airflow problems or stress on the blower? What about reduced efficiency?