Ventilation fan mounting assembly

1. An assembly for use in mounting an object in an opening in a structural member of a room, the structural member having opposing first and second surfaces, the assembly comprising:

a housing having an interior to house the object and sized and shaped to be received within the opening in the structural member, the housing has at least one wall that circumscribes the interior of the housing, the at least one wall having an interior face and a distal end;

a trim ring having a circumscribing ledge with an exterior surface and an interior surface, the circumscribing ledge defining a central opening, the trim ring further including an upstanding wall extending from the interior surface of the circumscribing ledge that is sized and shaped to fit within the interior of the housing, wherein the circumscribing ledge on the trim ring is substantially orthogonal to the upstanding wall, and the circumscribing ledge is sized and shaped to bear against the second surface of the structural member when the trim ring is mounted on the housing, and the upstanding wall on the trim ring is sized and shaped to bear against the interior face of the at least one wall of the housing adjacent the distal end thereof and in slidable engagement with the housing; and

a cover having a panel sized and shaped to cover the trim ring, the cover having a connector assembly that releasably connects the cover to the housing, the cover further including at least one standoff extending from the panel that is sized to bear against the trim ring in response to connection of the cover to the housing.

2. The assembly of claim 1 wherein the circumscribing ledge on the trim ring has an interior edge that circumscribes the central opening, and the upstanding wall extends from the interior edge of the circumscribing ledge to be substantially orthogonal to the circumscribing ledge.

3. The assembly of claim 1 , wherein the at least one wall of the housing has at least three walls that meet at at least three corners, and the upstanding wall of the trim ring has at least three corners, each corner of the upstanding wall sized and shaped to fit inside a respective corner of the at least three corners of the housing.

4. The assembly of claim 1 wherein the at least one standoff on the cover panel comprises at least two legs extending from the cover panel that are sized and shaped to hold the trim ring to the housing and the structural member and to position the cover panel away from the second surface of the structural member to enable air and vapor to pass between the second surface of the structural member and the cover panel and into the interior of the housing.

5. The assembly of claim 4 wherein the cover includes a light housing and the panel on the cover panel includes a lens positioned adjacent the light housing.

6. The assembly of claim 1 wherein the at least one standoff comprises at least two legs extending from the panel a first distance from the panel, the panel including at least one sidewall extending from the panel a second distance that is less than the first distance.

7. The assembly of claim 6 wherein the cover has four sides to form a square or rectangular planform shape, and the panel on the cover has a concave interior side and corresponding opposing convex exterior side.

8. An assembly for use in mounting an object in an opening in a structural member, the structural member having opposing first and second surfaces, the assembly comprising:

a housing that is sized and shaped to define an interior to house the object and that can be received within the opening in the structural member, the housing including:

a first tab extending from a distal end of the housing, the first tab sized and shaped to be bent to bear against the first surface of the structural member; and

a second tab extending from the distal end, the second tab sized and shaped to engage the second surface of the structural member adjacent the opening and to attach the housing to the structural member;

wherein the first and second tabs are integrally formed with at least one wall, are co-planar with the at least one wall, and are formed of bendable material that retains a bent shape and can be bent more than once without failure, the first and second tabs having a thickness that enables manual bending of the first and second tabs from an original position to at least an angle of 90 degrees with respect to the at least one wall;

a trim ring having an upstanding wall extending from a ledge, the upstanding wall is sized and shaped to fit within the interior of the housing; and

a cover having a panel sized and shaped to cover the trim ring, the cover having a connector that releasably connects the cover to the housing, the cover further including at least one standoff extending therefrom that is sized and shaped to bear against the trim ring to hold the trim ring in place.

9. A ventilation assembly for mounting a ventilation fan in an opening in a structural member without tools, the structural member having opposing first and second surfaces, the assembly comprising:

a housing that is sized and shaped to define an interior that is capable of housing the ventilation fan, the housing sized and shaped to be slidably received within the opening in the structural member;

a trim ring capable of attachment to the housing, the trim ring including a circumscribing ledge with an exterior surface and an interior surface, the circumscribing ledge defining a central opening, the trim ring further including an upstanding wall extending from the interior surface of the circumscribing ledge that is sized and shaped to fit within the interior of the housing, wherein the circumscribing ledge on the trim ring is substantially orthogonal to the upstanding wall; and

a cover having a connector that releasably connects the cover to the housing;

wherein the housing includes:

a first tab extending from a distal end of a side wall of the housing, the first tab sized and shaped to be bent to bear against the first surface of the structural member; and

a first tab extending from a distal end of a side wall of the housing, the first tab sized and shaped to be bent to bear against the first surface of the structural member; and

a second tab extending from the distal end of the side wall, the second tab sized and shaped to bear against the second surface of the structural member adjacent the opening and to hold the housing to the structural member;

wherein the first and second tabs are integrally formed with the side wall and are co-planar with the side wall; and

wherein the circumscribing ledge on the trim ring is sized and shaped to extend laterally beyond the first and second tabs on the housing when the first and second tabs are bent.

10. The assembly of claim 9 wherein the first and second tabs are formed of bendable material that retains a bent shape and can be bent more than once without failure, the first and second tabs having a thickness that enables manual bending of the first and second tabs from an original position to at least an angle of 90 degrees with respect to the side wall.

11. The assembly of claim 9 , wherein the circumscribing ledge on the trim ring is substantially orthogonal to the upstanding wall, and the circumscribing ledge is sized and shaped to bear against the second surface of the structural member when the trim ring is mounted on the housing.

12. The assembly of claim 9 wherein the trim ring includes a lip extending from a distal edge of the circumscribing ledge in a first direction, the lip sized to have a length that is equal to or greater than a thickness of the first and second tabs.