Roof vent

Details Roof vent Roof vent

F - Mech Eng,Light,Heat,Weapons

24

F

F24F 7/02 (2006.01) E04D 13/17 (2006.01) F24F 13/14 (2006.01)

Patent

CA 2326371

A roof vent is fabricated, for example by injection molding, as a unitary plastic part. The roof vent is weatherproof and inexpensive to manufacture. A duct adapter snaps into the roof vent to permit the connection of ducts of various sizes. The duct adapter has a stepped portion with cylindrical steps dimensioned to fit inside standard ducts of two different diameters. A collar dimensioned to fit around the outside surface of a larger duct extends around the duct adapter. A flap valve at the upper end of the duct adapter closes the duct when air is not flowing out through the duct.

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