BUILDMART - 60" Plenum Box for [60" Linear Slot Diffuser - 1 Slot - Single Slot] Premium Insulated Plenum Box for Heating and CoolingGalvanized sheet metal Plenum Box with foam insulation, ideal for Texas Buildmart 60" lineal slot diffuser. This air distribution box attaches directly to the supply of the HVAC equipment that heats or cools the air. Connects to: 8" 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

Entry size: 10" flex in oval shape

Grilles & Vents - Home Decor & Wall Decor for Amazon Home

CFM: 310 ft3/min - Effective Velocity: 9

ideal for Texas Buildmart 12" lineal slot diffuser

ASIN: B08MZB3LLS

Total Box Dimensions: L: 36 7/8" W: 6 1/8" H: 12 1/16"

12 Inch 2 Slot White Double Linear Diffuser

20 x 6 20x6 6x20 6 x 20

Our Standard Linear Slot Diffusers have ASHRAE 70 and ANSI S12

12 Inch 3 Slot White Triple Linear Diffuser

ASIN: B09JB8C717

22 x 10 22x10 10x22 10 x 22