BUILDMART - 12 Inch Plenum Box for [12 Inch Linear Slot Diffuser - 3 Slot - Triple Slot] Premium Insulated Plenum Box for Heating and Cooling - Texas Buildmart

Galvanized sheet metal Plenum Box with foam insulation, ideal for Texas Buildmart 12" lineal slot diffuser. This air-distribution box attaches directly to the supply of the HVAC equipment that heats or cools the air. Connects to: 9" flexible duct in oval shape. Can be used and brazed to a 4" or 6" wood stud. If you do not have this size flex, you can use a reducer to modify the size. Professional HVAC Installer is Recommended. Ideal for Texas Buildmart 12" Lineal Slot Diffuser - 3 Slot Galvanized sheet metal Plenum Box with foam insulation Total Box Dimensions: L: 13 1/4" W: 6 3/16" H: 12" Mouth Dimensions: L: 11 7/8" W: 4 3/4" Entry size: 9" 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   Here's a link to the Diffuser that fits this Plenum Box: 12" Linear Slot Diffuser - 3 Slot - Triple Slot Linear Diffuser - Texas Buildmart - Modern AC Vent Covers for Ceilings, Walls & Floors - Commercial Grade HVAC Registers, Grilles & Vents - Home Decor & Wall Decor for Amazon Home       Here's a link to the Diffuser that fits this Plenum Box: 12" Linear Slot Diffuser - 3 Slot - Triple Slot Linear Diffuser - Texas Buildmart - Modern AC Vent Covers for Ceilings, Walls & Floors - Commercial Grade HVAC Registers, Grilles & Vents - Home Decor & Wall Decor for Amazon Home