Plenum R/A 22 7/8 X 24 4-Jan

Retairplenum 23-1/8 X12-

Plenum Return Air 21-1/2 X 15

Retplenm 21-1/2X15 15 Liner

Plenum Return Air 21-1/2 X 15

Retplenm 21-1/2X15 15 Liner

Retairplenum 23-1/8 X14-

Retairplenum 23-1/8 X18-

Retairplenum 20 X 14-1/2 X 36

Return Air Plenum 20 X 18 X36