16x20x1 Return Air Filter Rack Plenum – Sheet Metal, USA Made, Shop Model

This is a simple, solid return air filter rack plenum.

Takes a standard 16 x 20 x 1 filter.

Made in the USA, shop-built style, no MPN or UPC—just straight-up sheet metal that does the job.

Brand is listed as the product name itself, so you know it’s no-frills.

New, in original packaging.

If you’re piecing together a duct system or replacing a busted box, this is the kind of part you grab and go.

No crazy features, just fits and works.