Roof vent fan assembly

Claim 1

A vent fan assembly for a roof comprising: a body having a plurality of sidewalls extending in one direction and defining a closed polygonal shape, a roof support flange extending perpendicularly to the sidewalls and outwardly from the exterior of the sidewalls between a top end and a bottom end of the sidewalls, a motor mount flange extending perpendicular to the sidewalls and inwardly from the interior of the sidewalls to define a first circular opening; a shroud having a cylindrical sidewall extending in the same direction as the sidewalls of the body, a base plate secured to a lower end of the cylindrical sidewall having a screen support flange extending in a plane inwardly from the cylindrical sidewall to define a second circular opening, and a trim flange extending outwardly toward the sidewalls of the body to an outer edge adjacent to and spaced from said body sidewalls, said cylindrical sidewall having an upper end adapted to engage the motor mount flange adjacent the first circular opening, said body and shroud defining a pocket between the sidewalls of the body and the cylindrical sidewall of the shroud, the pocket having a downwardly facing opening defined by the outer edge of the trim flange and said sidewalls of the body; a bezel having a plurality of sidewalls extending in the same direction as said body sidewalls and shaped substantially congruently thereto, said bezel further having a ceiling flange extending outwardly in a direction parallel to said roof support flange from the lower edge of said bezel sidewalls, said bezel walls being telescopically received in the pocket whereby roofs of different thicknesses may be received between the ceiling flange and the roof support flange; a motor and fan blade secured to the motor mount flange; and an openable cover connected to the body above said motor to selectively close said vent fan assembly.