Plenum Return Air

Plenum R/A 19 7/8 X 20

Plenum R/A 19 7/8 X 20

Plenum R/A 15 7/8 X 24 40547

Plenum Ret15-7/8X24X36 R8

15 7/8 X 24 X 36 Plenum

Plenum R/A 15 7/8 X 24 4-Jan

Plenum R/A 19 3/8 X 24 40547

Plenum Ret19-1/2X24-1/2 X36 R8

19 1/2 X 24 1/4 X 36 Ple Num