Knockdown Supply Plenum with Top - 20" x 20" x 36" - C WidthThe trim-to-fit knockdown plenum fully assembled measures 20 in. W x 20 in. D x 36 in. H. and is designed for use with 21" wide furnaces. The knock-down design of the plenum takes up very little space and simplifies transporting to the job site. Simply measure and cut to size using tin snips to match the supply opening of the air handler, furnace, or evaporator coil. This knockdown plenum is designed to be used with multiple different brands and comes with 4 trimable side and 1 trimable top.
Checkout furnance accessories
Furnace Return Air Box with Filter Rack - 21.5" x 28.5"Southwark return air box features a 20" x 25" x 1" filter rack and measures 21" wide, 28" deep, and 18" tall.
