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Front view of a black 48-inch 2-slot linear diffuser with 19mm openings for precision airflow in commercial HVAC systems
Side view of a black 48-inch 2-slot linear diffuser with 19mm openings for precision airflow in commercial HVAC systems
Another view of a black 48-inch 2-slot linear diffuser with 19mm openings for precision airflow in commercial HVAC systems
Face dimensions of a black 48-inch 2-slot linear diffuser with 19mm openings for precision airflow in commercial HVAC systems
Neck dimensions of a black 48-inch 2-slot linear diffuser with 19mm openings for precision airflow in commercial HVAC systems
Frame height of a black 48-inch 2-slot linear diffuser with 19mm openings for precision airflow in commercial HVAC systems
Full dimensions of a black 48-inch 2-slot linear diffuser with 19mm openings for precision airflow in commercial HVAC systems
Linear Slot Diffuser -2-slot submittal
Linear Slot Diffuser - 2-slot comparison
Linear Slot Diffuser - Installation instructions

48" Linear Slot Diffuser Vent Cover (2 Slots with 19mm Openings) - Matte Black - FLO-MATRIX HVAC

FWASD19-2/114.5W/1247L/005
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$117.06 CAD
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$117.06 CAD
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Details


The 48-inch linear slot diffuser delivers both form and function with its matte black finish and heavy-duty extruded aluminum build. Designed for architects and HVAC pros, this dual-slot model moves more air than single-slot versions while maintaining precise control via 19mm adjustable blades (up to a 180° air pattern). Perfect for VAV systems and general airflow in commercial or residential spaces, it combines architectural-grade durability with optimized performance. Check our smoke test video to see it in action in the videos section. Professional installation recommended for best results.

     

    • Precision Design & Fit: With a 48" x 3¼" nominal size, this linear slot diffuser features two crisp, ¾" openings for a sharp, modern look that seamlessly integrates into any ceiling. (Check the size diagram for exact measurements).
    • Prevents Ceiling Smudges & Stains: A built-in gasket creates an airtight seal against the ceiling. This stops air leakage, protects your ceiling from dust marks, and ensures airflow is directed perfectly through the slotted vent covers.
    • Heavy-Duty & Built to Last: : Constructed from commercial-grade 6063-T5 aluminum. It's reinforced with Tig welds to prevent cracking, chipping, or bending, guaranteeing a lifetime of reliable performance.
    • Durable Matte Black Finish: Features a sleek, matte black powder coat finish. This is not only for its modern appeal but also for its exceptional resistance to corrosion, scuffs, and daily wear and tear.
    • Sleek, No-Visible-Screw Design: Achieve a clean, minimalist installation with no screws showing on the face of the register. All fastening points are cleverly hidden on the inner sides for a flawless finish. (Please note: fasteners are not included).
    • Tailor Your Airflow: For ultimate control, easily pair this unit with a custom plenum box (sold separately) to fine-tune performance for any HVAC system. See our video guide to learn more about plenum options.
    • Quick Shipping from North America: We ship from our warehouse in Vancouver, Canada. Most orders to the U.S. arrive within 2-7 business days after shipping.

     

    Full dimensions of a black 48-inch 2-slot linear diffuser with 19mm openings for precision airflow in commercial HVAC systems

     

    Performance

     

    Performance Data

    Flow Rate (CFM)

     Static Pressure (in.wg) Noise Level (NC)

    257
    375
    500

    0.09
    0.18
    0.31

    20
    30
    40

      * Flow rate (CFM) and static pressure (in.wg) are interrelated. It is crucial to know your HVAC system total or static pressure when choosing the proper GRD for optimal performance.

     

     

    Submittal

     

    Click here to download a high resolution of this submittal sheet

     

    Linear Slot Diffuser -2-slot submittal

     

    Resources

     

    Our Guide to 19mm VS. 25mm Slot Width Differences

     

    Linear Slot Diffusers: The Smart Choice for Modern HVAC Systems

     

    CFD Airflow Analysis Services for Smarter HVAC Design

     

     

    The Key Characteristics of Commercial-Grade Air Distribution Products

    Commercial-grade grilles, registers, and diffusers are defined by one crucial element: complete and accurate technical data. This information empowers architects, engineers, and HVAC contractors to make informed decisions, providing clear details on material grades and comprehensive performance specifications like noise levels (NC), airflow capacity, and pressure drop.

    We ensure our products meet this high bar through rigorous testing in accordance with ASHRAE 70-2006 and ADC1062:GRD-84. Our development process harnesses the power of computational fluid dynamics (CFD) to innovate and improve, resulting in designs that maximize energy efficiency and airflow control.

    We have manufactured premium linear slot diffusers (1-12 slot options) for the commercial HVAC industry since 1997. For personalized guidance tailored to your project’s needs, please contact our product specialists at +1-604-437-1527.

     

    Videos

     

    Showcase Video of Product - 2 Slots Linear Diffuser

    Linear Slot Diffuser Smoke Test (Horizontal Throw) Video - 2 Slots

     

    Videos of previous custom plenums

     

    Our retail store showroom - Greater Vancouver, Canada

    Details


    The 48-inch linear slot diffuser delivers both form and function with its matte black finish and heavy-duty extruded aluminum build. Designed for architects and HVAC pros, this dual-slot model moves more air than single-slot versions while maintaining precise control via 19mm adjustable blades (up to a 180° air pattern). Perfect for VAV systems and general airflow in commercial or residential spaces, it combines architectural-grade durability with optimized performance. Check our smoke test video to see it in action in the videos section. Professional installation recommended for best results.

       

      • Precision Design & Fit: With a 48" x 3¼" nominal size, this linear slot diffuser features two crisp, ¾" openings for a sharp, modern look that seamlessly integrates into any ceiling. (Check the size diagram for exact measurements).
      • Prevents Ceiling Smudges & Stains: A built-in gasket creates an airtight seal against the ceiling. This stops air leakage, protects your ceiling from dust marks, and ensures airflow is directed perfectly through the slotted vent covers.
      • Heavy-Duty & Built to Last: : Constructed from commercial-grade 6063-T5 aluminum. It's reinforced with Tig welds to prevent cracking, chipping, or bending, guaranteeing a lifetime of reliable performance.
      • Durable Matte Black Finish: Features a sleek, matte black powder coat finish. This is not only for its modern appeal but also for its exceptional resistance to corrosion, scuffs, and daily wear and tear.
      • Sleek, No-Visible-Screw Design: Achieve a clean, minimalist installation with no screws showing on the face of the register. All fastening points are cleverly hidden on the inner sides for a flawless finish. (Please note: fasteners are not included).
      • Tailor Your Airflow: For ultimate control, easily pair this unit with a custom plenum box (sold separately) to fine-tune performance for any HVAC system. See our video guide to learn more about plenum options.
      • Quick Shipping from North America: We ship from our warehouse in Vancouver, Canada. Most orders to the U.S. arrive within 2-7 business days after shipping.

       

      Full dimensions of a black 48-inch 2-slot linear diffuser with 19mm openings for precision airflow in commercial HVAC systems

       

      Performance

       

      Performance Data

      Flow Rate (CFM)

       Static Pressure (in.wg) Noise Level (NC)

      257
      375
      500

      0.09
      0.18
      0.31

      20
      30
      40

        * Flow rate (CFM) and static pressure (in.wg) are interrelated. It is crucial to know your HVAC system total or static pressure when choosing the proper GRD for optimal performance.

       

       

      Resources

       

      Our Guide to 19mm VS. 25mm Slot Width Differences

       

      Linear Slot Diffusers: The Smart Choice for Modern HVAC Systems

       

      CFD Airflow Analysis Services for Smarter HVAC Design

       

       

      The Key Characteristics of Commercial-Grade Air Distribution Products

      Commercial-grade grilles, registers, and diffusers are defined by one crucial element: complete and accurate technical data. This information empowers architects, engineers, and HVAC contractors to make informed decisions, providing clear details on material grades and comprehensive performance specifications like noise levels (NC), airflow capacity, and pressure drop.

      We ensure our products meet this high bar through rigorous testing in accordance with ASHRAE 70-2006 and ADC1062:GRD-84. Our development process harnesses the power of computational fluid dynamics (CFD) to innovate and improve, resulting in designs that maximize energy efficiency and airflow control.

      We have manufactured premium linear slot diffusers (1-12 slot options) for the commercial HVAC industry since 1997. For personalized guidance tailored to your project’s needs, please contact our product specialists at +1-604-437-1527.

       

      Videos

       

      Showcase Video of Product - 2 Slots Linear Diffuser

      Linear Slot Diffuser Smoke Test (Horizontal Throw) Video - 2 Slots

       

      Videos of previous custom plenums

       

      Our retail store showroom - Greater Vancouver, Canada