I have new rooms I am framing in my basement. Can I add registers (one each) to the existing 5" service ducts that service the first floor? These ducts are in between the overhead joist are easy to access.
In other words, can one 5" duct service two registers, or must I add a new 5 "duct to the main trunk to service a basement room?
Last edited by sakskc; 07-29-2010 at 01:27 PM.