Return Air Boxes

This 30 x 20 in. return air box forms a plenum behind a compatible return grille.Nominal face size: 30 x 20 in.For a ceiling or floor return installationPair with a suitable start collar and return...

This 20 x 20 in. return air box forms a plenum behind a compatible return grille.Nominal face size: 20 x 20 in.For a ceiling or floor return installationPair with a suitable start collar and return...

This 25 x 20 in. return air box forms a plenum behind a compatible return grille.Nominal face size: 25 x 20 in.For a ceiling or floor return installationPair with a suitable start collar and return...

This 24 x 24 in. return air box forms a plenum behind a compatible return grille.Nominal face size: 24 x 24 in.For a ceiling or floor return installationPair with a suitable start collar and return...

This 20 x 14 in. return air box forms a plenum behind a compatible return grille.Nominal face size: 20 x 14 in.For a ceiling or floor return installationPair with a suitable start collar and return...

This 20 x 16 in. return air box forms a plenum behind a compatible return grille.Nominal face size: 20 x 16 in.For a ceiling or floor return installationPair with a suitable start collar and return...

This 24 x 12 in. return air box forms a plenum behind a compatible return grille.Nominal face size: 24 x 12 in.For a ceiling or floor return installationPair with a suitable start collar and return...

This 25 x 14 in. return air box forms a plenum behind a compatible return grille.Nominal face size: 25 x 14 in.For a ceiling or floor return installationPair with a suitable start collar and return...

This 25 x 16 in. return air box forms a plenum behind a compatible return grille.Nominal face size: 25 x 16 in.For a ceiling or floor return installationPair with a suitable start collar and return...

This 20 x 12 in. return air box forms a plenum behind a compatible return grille.Nominal face size: 20 x 12 in.For a ceiling or floor return installationPair with a suitable start collar and return...

This 12 x 12 in. return air box forms a plenum behind a compatible return grille.Nominal face size: 12 x 12 in.For a ceiling or floor return installationPair with a suitable start collar and return...

This 14 x 14 in. return air box forms a plenum behind a compatible return grille.Nominal face size: 14 x 14 in.For a ceiling or floor return installationPair with a suitable start collar and return...