This is a professionally designed return ductwork installation kit for the BM18MCD (18000 btus) and BM24MCD (24000 btus) concealed duct (multi room) air handlers. With the exception of the return plenum itself this kit includes all of the materials needed to successfully install the BM18MCD and BM24MCD return ductwork. This kit has been designed specifically to deliver an optimal performance level and help to simplify the installation. It uses one 14 inch return duct to optimize air mixture in your space and simplify the return air installation. It is highly recommended that you select one of the matching supply duct installation kits as well and the supply and return air plenum KIT-BPK18 (18000 btu) or KIT-BPK24 (24000 btu). This kit is designed to be used with a ductboard plenum such as KIT-BPK18 and KIT-BPK24. This kit is not compatible with a sheet metal plenum. It includes:

x1 25 feet of 14 inch R8 metalized flex duct
x1 14 inch ductboard takeoff collar (no damper)
x1 14.5 x 25.5 x 14(round connection) Non insulated ceiling box
x1 14 x 25 x 1 ceiling filter grille
x1 Foil Tape