Abstract: A clothes dryer vent system is designed for hollow walls framed with scantling and covered with sheathing secured to the scantling. A rough-in box has a main body with a substantially planar rear panel, non-parallel curved side panels, a curved bottom panel, and a planar top panel that is generally perpendicular to the rear panel. The side, top and bottom panels intersect and are unitary with the rear panel, with each side panel intersecting and unitary with both top and bottom panels. The main body has a stub connector pipe affixed within the top panel that is designed to accept a 4-inch diameter metal vent pipe that has been compressed to an oval configuration. The stub connector pipe has an internal step that limits the insertion depth of the metal vent pipe. A flexible vent hose mounting insert has a stub pipe extension that fits within the stub connector pipe. The mounting insert has a pair of retaining clips that allow it to be secured to the main body of the rough-in box.

Abstract: A clothes dryer vent system is designed for hollow walls framed with scantling and covered with sheathing secured to the scantling, the walls having a hollow interior space that is uniformly, at least about 3½ inches wide. The vent system includes a rough-in box for recessed mounting within a hollow wall, the rough-in box having a substantially planar rear panel, side panels and nonparallel top and bottom panels, the side panels and the top and bottom panels intersecting and unitary with the rear panel, each side panel intersecting and unitary with both top and bottom panels, the rough-in box also having a depth no greater than about 4 inches, and a stub connector pipe affixed within the top panel, the stub connector pipe having a lower portion of oval-shaped cross section within the box that is couplable to a flexible dryer vent hose and an upper portion outside the box directly couplable to an oblong vent pipe having a minor cross-sectional dimension no greater than about 2 inches.