18" X 3 3/8" Linear Slot Plenum Box - For Double Slot (2 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
18" X 3 3/8" Linear Slot Plenum Box - For Double Slot (2 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
18" X 3 3/8" Linear Slot Plenum Box - For Double Slot (2 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
18" X 3 3/8" Linear Slot Plenum Box - For Double Slot (2 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
18" X 3 3/8" Linear Slot Plenum Box - For Double Slot (2 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
18" X 3 3/8" Linear Slot Plenum Box - For Double Slot (2 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
18" X 3 3/8" Linear Slot Plenum Box - For Double Slot (2 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
18" X 3 3/8" Linear Slot Plenum Box - For Double Slot (2 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
18 in Plenum Box - 1 entry - 8 in flex
Linear Slot Diffusers

18" X 3 3/8" Linear Slot Plenum Box - For Double Slot (2 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

Regular price $84.99 Sale price $99.99 Unit price per
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  • Galvanized sheet metal Plenum Box with black foam insulation, ideal for Texas Buildmart 18" 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 Buildmart 18" Lineal Slot Diffuser - 2 Slot
  • Galvanized sheet metal Plenum Box with foam insulation
  • Total Box Dimensions: L: 19 1/8" W: 4 9/16" H: 11 7/8"
  • Mouth Dimensions: L: 18" W: 3 3/8"
  • Entry size: 8" 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:

18" Linear Slot Diffuser - 2 Slot - AC Vent - Register