Air vent (4)
I believe the answer is:
duct
(Other definitions for duct that I've seen before include "Channel" , "Tube for conveing cable, liquid etc" , "Pipe, tube" , "Tube, passageway" , "The Eve of St - is a narrative poem by Keats" .)
I believe the answer is:
duct
(Other definitions for duct that I've seen before include "Channel" , "Tube for conveing cable, liquid etc" , "Pipe, tube" , "Tube, passageway" , "The Eve of St - is a narrative poem by Keats" .)