BUILDMART - 72 Plenum Box for [72 Linear Slot Diffuser - 2 Slot - Double Slot] Premium Insulated Plenum Box for Heating and Cooling

Ideal for Texas Buildmart 72" Lineal Slot Diffuser - 2 Slot Galvanized sheet metal Plenum Box with foam insulation Total Box Dimensions: L: 72 5/16" W: 4 11/16" H: 12" Mouth Dimensions: L: 71 1/8" W: 3 1/2" Entry size: 2 entries of 10" flex in oval shape This air-distribution box attaches directly to the supply of the HVAC equipment that heats or cools the air If you do not have this size flex, you can use a reducer to modify the size We recommend using a "Y" shaped splitter to supply your plenum box with an even amount of airflow through your diffuser