a system for management of a roof having first and second decks covering an unconditioned space in a building and a peak , the system having a first channel extending from proximate a lower end of the first deck towards the peak and a second channel extending from proximate a lower end of the second deck towards the peak . the system further includes a router positioned proximate the peak , the router enabling air flowing to the peak from the first channel to be selectively routed to one of a plurality of directions .