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Front view of a black 16 inch 2-slot linear diffuser with 25mm openings for high airflow in commercial HVAC systems
Side view of a black 16 inch 2-slot linear diffuser with 25mm openings for high airflow in commercial HVAC systems
Another side view of a black 16 inch 2-slot linear diffuser with 25mm openings for high airflow in commercial HVAC systems
Face dimensions of a black 16 inch 2-slot linear diffuser with 25mm openings for high airflow in commercial HVAC systems
Neck dimensions of a black 16 inch 2-slot linear diffuser with 25mm openings for high airflow in commercial HVAC systems
Frame height of a black 16 inch 2-slot linear diffuser with 25mm openings for high airflow in commercial HVAC systems
Full dimensions of a black 16 inch 2-slot linear diffuser with 25mm openings for high airflow in commercial HVAC systems
Linear Slot Diffuser CFD Simulation (high airflow 2 slots)
Linear Slot Diffuser high airflow 2-slot submittal
Linear Slot Diffuser - 2-slot comparison (precision VS. high airflow)
Linear Slot Diffuser - Installation instructions

16" Linear Slot Diffuser Vent Cover (2 Slots with 25mm Openings) - Matte Black - FLO-MATRIX HVAC

FWASD25-2/125W/434L/005
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$43.98 CAD
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$43.98 CAD
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Details


This 16-inch linear slot diffuser in matte black combines durability and performance with its architectural-grade extruded aluminum construction. Perfect for VAV systems and general air distribution, its dual 25mm slots with 180° adjustable blades boost airflow by 17% over our 19mm two-slot models while reducing static pressure by 33%—enhancing AC efficiency without taxing ductwork. Lab-tested performance data (flow rate, noise, and pressure) is available to ensure system compatibility. See our smoke test video for airflow demonstration. Professional installation recommended.

 

  • Clean, Modern Design: With a 16" x 3½" nominal size, this linear slot diffuser is engineered with two sharp, 1-inch openings for a minimalist look that complements any commercial or residential space. (Please see the diagram for precise measurements).
  • High-Velocity Airflow Performance: The wider 1-inch slot is a major upgrade from standard 19mm vent covers, enabling a significantly higher volume of air to move through quietly and efficiently for demanding HVAC systems.
  • Eliminates Ceiling Dust Marks: An integrated gasket creates a perfect seal against the ceiling tile, preventing leaked air from causing unsightly smudges and ensuring all conditioned air is delivered into the room.
  • Rugged Commercial Construction: Built from heavy-gauge 6063-T5 aluminum and fortified with robust Tig welds to withstand the rigors of daily use in any environment.
  • Durable Matte Black Finish: Features a sophisticated matte black powder coat that is highly resistant to scratches, corrosion, and daily wear, ensuring it looks pristine for years to come.
  • Seamless No-Screw Aesthetic: Achieve a flawless, uninterrupted look with a design that hides all mounting hardware on the interior edges for a clean install. (Note: Fasteners are not included).
  • Optimize Your Air Distribution: For peak HVAC efficiency, pair this air diffuser with an custom plenum box (sold separately) to perfectly balance airflow. Check out our video to learn more.
  • Fast North American Shipping: We dispatch promptly from our warehouse in Vancouver, Canada. Delivery to most US locations is completed within 2-7 business days.

 

Full dimensions of a black 16 inch 2-slot linear diffuser with 25mm openings for high airflow in commercial HVAC systems

 

Performance

 

Performance Data

Flow Rate (CFM)

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

91
141
166

0.06
0.15
0.20

20
30
35

  * 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 high airflow 2-slot submittal


 

Resources

 

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

 

Linear Slot Diffusers: The Smart Choice for Modern HVAC Systems

 

Why 6063-T5 Aluminum is the Gold Standard for Your Linear Slot Diffuser

 

CFD Airflow Analysis Services for Smarter HVAC Design

 

The Engineer's Standard for Commercial HVAC Grilles and Diffusers

In professional HVAC design, "commercial grade" is a promise of performance, backed by data. It provides the detailed technical information—from the composition to certified metrics on NC (noise criteria), flow rates, and pressure drop—that engineers rely on for precise specification and predictable results.

We uphold this promise by subjecting our products to testing aligned with ASHRAE Standard 70-2006 and ADC1062:GRD-84. Our design philosophy leverages computational fluid dynamics (CFD) to continuously innovate, creating energy-efficient solutions that meet the highest standards of modern building design.

For over two decades, since 1997, we have specialized in manufacturing high-performance linear slot diffusers (1-12 slots) for commercial applications. Contact our product specialists at +1-604-437-1527 for expert consultation on your next project.

 

 

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


This 16-inch linear slot diffuser in matte black combines durability and performance with its architectural-grade extruded aluminum construction. Perfect for VAV systems and general air distribution, its dual 25mm slots with 180° adjustable blades boost airflow by 17% over our 19mm two-slot models while reducing static pressure by 33%—enhancing AC efficiency without taxing ductwork. Lab-tested performance data (flow rate, noise, and pressure) is available to ensure system compatibility. See our smoke test video for airflow demonstration. Professional installation recommended.

 

  • Clean, Modern Design: With a 16" x 3½" nominal size, this linear slot diffuser is engineered with two sharp, 1-inch openings for a minimalist look that complements any commercial or residential space. (Please see the diagram for precise measurements).
  • High-Velocity Airflow Performance: The wider 1-inch slot is a major upgrade from standard 19mm vent covers, enabling a significantly higher volume of air to move through quietly and efficiently for demanding HVAC systems.
  • Eliminates Ceiling Dust Marks: An integrated gasket creates a perfect seal against the ceiling tile, preventing leaked air from causing unsightly smudges and ensuring all conditioned air is delivered into the room.
  • Rugged Commercial Construction: Built from heavy-gauge 6063-T5 aluminum and fortified with robust Tig welds to withstand the rigors of daily use in any environment.
  • Durable Matte Black Finish: Features a sophisticated matte black powder coat that is highly resistant to scratches, corrosion, and daily wear, ensuring it looks pristine for years to come.
  • Seamless No-Screw Aesthetic: Achieve a flawless, uninterrupted look with a design that hides all mounting hardware on the interior edges for a clean install. (Note: Fasteners are not included).
  • Optimize Your Air Distribution: For peak HVAC efficiency, pair this air diffuser with an custom plenum box (sold separately) to perfectly balance airflow. Check out our video to learn more.
  • Fast North American Shipping: We dispatch promptly from our warehouse in Vancouver, Canada. Delivery to most US locations is completed within 2-7 business days.

 

Full dimensions of a black 16 inch 2-slot linear diffuser with 25mm openings for high airflow in commercial HVAC systems

 

Performance

 

Performance Data

Flow Rate (CFM)

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

91
141
166

0.06
0.15
0.20

20
30
35

  * 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

 

Why 6063-T5 Aluminum is the Gold Standard for Your Linear Slot Diffuser

 

CFD Airflow Analysis Services for Smarter HVAC Design

 

The Engineer's Standard for Commercial HVAC Grilles and Diffusers

In professional HVAC design, "commercial grade" is a promise of performance, backed by data. It provides the detailed technical information—from the composition to certified metrics on NC (noise criteria), flow rates, and pressure drop—that engineers rely on for precise specification and predictable results.

We uphold this promise by subjecting our products to testing aligned with ASHRAE Standard 70-2006 and ADC1062:GRD-84. Our design philosophy leverages computational fluid dynamics (CFD) to continuously innovate, creating energy-efficient solutions that meet the highest standards of modern building design.

For over two decades, since 1997, we have specialized in manufacturing high-performance linear slot diffusers (1-12 slots) for commercial applications. Contact our product specialists at +1-604-437-1527 for expert consultation on your next project.

 

 

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