Plenum Return Air 22-7/8 X 20

R6 Return Air Plenum 22- 7/8 X

Plenum Return Air 22-7/8 X 20

Plenum R6 Lined

Plenum Returnair 12-3/8X

Plenum Ret12-3/8X19-7/8 X36 R8

Retplenm12-3/8X19-7/8 1 5 Ln

Plenum Returnair 12-3/8X

Retplenm12-3/8X19-7/8 1 5 Ln

Plenum Returnair 15-5/8X