Four-Piece Baseboard Register Hood and Duct Kit

This is a four-part replacement hood and duct kit for a baseboard HVAC register: two hood halves, a straight extension tunnel, and a 90-degree side-turn end cap. When the hood halves are joined, the hood measures 450 mm wide along the wall, 80 mm deep, and 115 mm tall. The rear and bottom are open to take air from the baseboard void; the sloped front funnels that air into a centered horizontal nozzle at the lower front edge. The nozzle is 150 mm wide, 40 mm tall, and projects 20 mm forward.

All four parts print separately and slide together with dovetail joints. The extension and cap sit on the plate beside the hood halves, not pre-assembled. The sliding joints use 0.3 mm clearance per side, and the chunk and cap sockets have small friction bumps. For an air-tight run, add foam gasket tape or silicone along the socket edges; test-print one joint before reducing clearance below 0.3 mm.

Hood Specifications

• Printed hood halves: Hood_Left and Hood_Right, joined by a central vertical sliding dovetail with 0.3 mm clearance. They slide together vertically along the seam.
• Shell: nominal 3 mm walls, with a 24 mm wide band across the center of the sloped roof and front wall thickened to 8 mm so the dovetail cuts through solid material.
• Joined hood footprint: 450 × 80 × 115 mm.
• Rear wall side and bottom floor are open.
• Outlet nozzle: 150 × 40 mm, projecting 20 mm forward.
• Nozzle side tracks: male dovetail on each outer side, 6 mm wide at the root and 12 mm at the tip, 3 mm deep, with 45° flanks.
• The wider printed hood half measures about 228 mm across, so check print-bed width.

Extension Chunk

• Extension_Chunk is a straight hollow tunnel, 150 × 40 mm outside and 200 mm long, with 3 mm walls.
• Inlet socket: the first 20 mm has no top or bottom plate so it drops down over the nozzle; its side walls carry dovetail slots held 0.3 mm off the nozzle tracks. Small friction bumps sit at the top and bottom, two per side, to resist lifting off; they add friction rather than a positive click or seal.
• Outlet tracks: the same male dovetail as the hood nozzle, set 10 mm back from the end so the next chunk's socket fits over them.
• The socket end measures about 162.6 mm outside to house those slots.
• The tunnel has a bottom floor; it keeps the channel stiff and the sliding joints aligned over uneven flooring. Thinning that floor to 2 mm saves plastic; removing it will leak along the bottom.
• Chain as many chunks as the run needs; each one slides on vertically and can be swapped or added without tools.
• The chunk prints as a separate part alongside the hood halves, not pre-assembled.

Side Turn Cap

• Side_Turn_Cap is a 90-degree flat elbow end cap, nominal 150 mm wide, 40 mm tall, and 160 mm long, with 3 mm walls.
• Inlet: the same 20 mm dovetail socket as the chunk, open top and bottom, sliding vertically onto the chunk's outlet tracks with 0.3 mm clearance. Small friction bumps sit at the top and bottom, two per side, to resist lifting off; they add friction rather than a positive click or seal.
• Front end: closed off completely.
• Vent: one entire side wall is open as the exhaust; the top and bottom plates stay intact.
• Vanes: three internal quarter-circle turning vanes, 2 mm thick, with radii of 36, 72, and 108 mm, running the full interior height to turn airflow 90° out the side opening. The inlet gaps are an even 36 mm, including the gap to the far wall.
• Flip: the top and bottom are identical and symmetrical, so turning the cap upside down directs air out the other side.
• The socket end measures about 162.6 mm across; the cap prints as a separate part beyond the chunk on the plate.