Louver assembly

A louver assembly comprising a tubular housing having a generally rectangular interior passageway open at both ends and defined by top, bottom and end walls, a deflector body mounted within said tubular housing, said deflector body including a U-shaped central section with top and bottom legs extending normally from an elongated planar portion, and a wing at each end of said planar portion initially coplanar therewith and joined thereto by a living hinge and folded inwardly about said hinge against the ends of said legs forming a box-like member providing an open passageway through said housing, each said wing including a protuberance on its outer surface adapted to snap fit into a corresponding aperture in the adjacent end wall of said tubular housing upon insertion of said deflector body therein with said wings folded, and a vane cartridge mounted within said deflector body, said vane cartridge including a plurality of spaced-apart parallel vanes extending across said deflector body, each said vane being mounted at its ends to said wings of said deflector body by pivot pins received within cooperating pivot seats on the folded wings for pivotal movement about its longitudinal axis, and tie bars integrally formed with said vanes at a pair of diagonally opposite corners thereof interconnecting said vanes for movement in unison about their individual longitudinal axes within said deflector body to selectively direct air emerging from said louver or close off said passageway.