BUILDMART - 12" Plenum Box for [12" Linear Slot Diffuser - 3 Slot - Triple Slot] Premium Insulated Plenum Box for Heating and CoolingGalvanized 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

CFM: 812 ft3/min - Effective Velocity 9

36 x 14 36x14 14x36 14 x 36

ASIN: B09JBJLRKY

Neck: 29 9/16" x 5 3/4" - Face: 31 11/16" x 7 15/16"

ASIN: B081ZLDR7D

Ideal for Texas Buildmart 24" Lineal Slot Diffuser - 1 Slot

Total Box Dimensions: L: 72 5/16" W: 4 11/16" H: 12"

10 x 10 10x10 10x10 10 x 10

10 x 8 10x8 8x10 8 x 10

CFM: 542 ft3/min - Effective Velocity 9

Texas Buildmart offers Mud In Air Vent Covers also known as Drywall Mud-in White Air Vents

12'' X 1 3/4" Linear Slot Plenum Box - For Single Slot (1 Slot) Linear Diffuser - Texas Buildmart - Modern AC Vent Covers for Ceilings