BUILDMART - 12" Plenum Box for [12" Linear Slot Diffuser - 2 Slot - Double 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: 6" 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

72" Linear Slot Diffuser - 2 Slot - Double Slot Linear Diffuser - Texas Buildmart - Modern AC Vent Covers for Ceilings

CFM: 770 ft3/min - Effective Velocity: 9

Neck: 21 11/16" x 9 13/16" - Face: 23 3/4" x 11 3/4"

Mouth Dimensions: L: 59 3/8" W: 3 5/16"

ASIN: B09WTTTD9D

18" Linear Slot Diffuser - 2 Slot - Double Slot Linear Diffuser - Texas Buildmart - Modern AC Vent Covers for Ceilings

ASIN: B09GPT7LYP

ASIN: B09K5YD9GF

CFM: 246 ft3/min - Effective Velocity 9

Can be used and brazed to a 4" or 6" wood stud

24" Linear Slot Diffuser - 2 Slot - Double Slot Linear Diffuser - Texas Buildmart - Modern AC Vent Covers for Ceilings

CFM: 138 ft3/min - Effective Velocity: 9