ventiduct

from The Collaborative International Dictionary of English v.0.48

Ventiduct \Ven"ti*duct\, n. [L. ventus wind + ductus a leading,
   conduit, fr. ducere, ductum, to lead.]
   A passage for wind or air; a passage or pipe for ventilating
   apartments. --Gwilt.
   [1913 Webster]