Rear Airflow Plenum Assembly

Generate a parametric 3D CAD model of an enclosed, flat-pack rear airflow pressure plenum with integrated shelf supports and a recessed low-profile blower mount. All components must be designed strictly for 0.25-inch thick sheet material. 1. Main Rear Duct: Generate a solid flat back wall that is 15.7 inches wide and 28.0 inches tall. 2. Side Walls: Generate two solid side walls extending forward by 12.0 inches from the extreme left and right edges of the back wall. 3. Shelf Ledges: On the interior faces of both 12.0-inch side walls, generate 7 horizontal shelf ledges. Each ledge must run the full 12.0-inch depth, protrude inward by 0.5 inches, have a vertical thickness of 0.25 inches, and be spaced at a 3.875-inch vertical pitch starting 2.0 inches from the bottom edge. 4. Front Pressure Face: Enclose the front of the rear duct by generating a flat front panel spaced exactly 1.25 inches away from the back wall. 5. Graduated Airflow Slots: Cut 7 horizontal airflow slots into this front panel. Center them horizontally and make them 14.0 inches wide. Position the bottom edge of each slot perfectly flush with the top surface of its corresponding shelf ledge. Set the vertical heights of the slots progressively from bottom to top: Tier 1 (bottom) is 0.13 inches, Tier 2 is 0.14 inches, Tier 3 is 0.16 inches, Tier 4 is 0.17 inches, Tier 5 is 0.18 inches, Tier 6 is 0.20 inches, and Tier 7 (top) is 0.21 inches. 6. Recessed Blower Pocket & Intake: At the bottom center of the front panel (below Tier 1), generate a 2.25-inch wide by 0.75-inch tall rectangular exhaust cutout flush with an internal mounting pocket designed to recess a thin 15mm-20mm centrifugal blower directly inside the plenum channel. 7. Assembly Joinery: Apply 0.25-inch mortise-and-tenon (tab-and-slot) interlocking joints along all mating panel edges for flat-pack assembly.

Parameters

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