Return Air Drops, Plenums and Boxes

Southwark 1076 Adjustable Plenum, Sheet Metal, 24 Inch W x 36 Inch H x 24 Inch D

Southwark 1223B Cold Air Boot, 20 x 10 - 20 x 14 Inch, Sheet Metal

Southwark 1221B Cold Air Boot, 20 x 10 - 20 x 16 Inch, Sheet Metal

Southwark FSB1L-1428-6H Furnace Support Box, 14-1/2 Inch W x 28 Inch D x 6 Inch H

Southwark FSB1L-2128-6H Furnace Support Box, 21 Inch W x 28 Inch D x 6 Inch H

Southwark 1221 Return Air Package, 20 x 10 - 20 x 16 Inch, Sheet Metal

Southwark FSB1L-1428-12H Furnace Support Box, 14-1/2 Inch W x 28 Inch D x 12 Inch H

Southwark FSB1L-24-1/2X28-6H Furnace Support Box, 24-1/2 Inch W x 28 Inch D x 6 Inch H

Southwark FSB1L-17-1/2X28-6H Furnace Support Box, 17-1/2 Inch W x 28 Inch D x 6 Inch H

Southwark FB Furnace Support Box with Filter Slot, 20 x 25 x 1 Inch, 21 Inch W x 18 -1/2 Inch H

Southwark FB Furnace Support Box, 16 x 25 x 1 Inch, 17-1/2 Inch W x 18 Inch H

Southwark FB Furnace Support Box, 14 x 25 x 18 Inch, 14-1/2 Inch W x 18 Inch H