BUILDMART - 36" Plenum Box for [36" 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 36" lineal slot diffuser. This air distribution box attaches directly to the supply of the HVAC equipment that heats or cools the air. Connects to: 10" 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

ASIN: B09GPVL91G

CFM: 248 ft3/min - Effective Velocity: 9

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

ASIN: B085WJ25J4

CFM: 301 ft3/min - Effective Velocity: 9

but it is not designed to support weight

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

This Model can be used as a Supply Vent Cover and Return Vent Cover

Connects to: 6" flexible duct in oval shape

Ideal for Texas Buildmart 12" Lineal Slot Diffuser - 1 Slot

6 x 4 6x4 4x6 4 x 6

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