The Imperial Manufacturing RG0481 sidewall grille is built to support high-capacity airflow pathways matching a large 20 in. x 12 in. duct format. Constructed with premium one-piece steel and finished with a durable powder-coated white surface, this large rectangular face cover serves seamlessly for return air applications in both extensive residential and commercial building developments.
Large-scale mechanical contractors and multi-family property developers select this bulk-packaged option to maintain structural consistency and simplify procurement across multi-room renovations. This all-steel model features fixed internal fins spaced at three per inch and bent at a stable 35-degree deflection angle, answering search intent for durable vents that maintain exceptional static pressure balance and minimize system noise.
Accurate installation depends entirely on matching the interior rough opening measurements of the rectangular wall duct rather than tracking the outside dimensions of the grille flange. Featuring a 3/16-inch margin turnback, this component pulls securely against the drywall or ceiling frame to ensure a flush, rattle-free setup. Cross-reference your building specifications and total project volumes before installation.
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