Ships within Canada and USA. Delivery to USA takes 2-7 business days after dispatch! In stock and ready to ship.

22" Linear Slot Diffuser HVAC air vent cover
22" Linear Slot Diffuser HVAC air vent cover
22" Linear Slot Diffuser HVAC air vent cover
22" Linear Slot Diffuser HVAC air vent cover
22" Linear Slot Diffuser HVAC air vent cover
22" Linear Slot Diffuser HVAC air vent cover
22" Linear Slot Diffuser HVAC air vent cover
22" Linear Slot Diffuser HVAC air vent cover
Linear Slot Diffuser installation instructions guide
Linear Slot Diffuser CFD Simulation (WASD25-2)

22" Linear Slot Diffuser HVAC Air Vent Cover (2 Slots with 25mm Slot Openings) - Matte Black Finish (WASD25-2)

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$44.76 CAD
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$44.76 CAD
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This 22" linear slot diffuser has a beautiful finish in matte black. Our linear slot diffusers are architectural grade made with solid extruded aluminum where durability is a major concern. They are ideal for general air distribution and VAV applications. The 25mm slot width is equipped with adjustable blades for up to a 180° air pattern. Please watch our smoke test video below for air distribution performance. We recommend installation by professionals for this product.

  • Nominal Size: 22" x 3-1/2" (please refer to size diagram below for details)
  • The slot openings are 1" inch (25mm) wide.
  • There are no pre-drilled holes on the surface. Fastening must be done on the inner border sides for an aesthetic appearance.
  • Commercial Grade
  • Please note that our slot diffusers do not include fasteners.
  • Material: solid extruded aluminum
  • Finish: Powder coated in matte black
  • Contact us for customizable plenum box options.
  • Ships from Vancouver, Canada. Shipping to USA takes 2-7 business days after dispatch (depends on delivery address).


Performance Data

Flow Rate (CFM)

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




  * 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.


What constitutes commercial grade grilles, registers, and diffusers (GRD)? 

A commercial grade product should have a complete set of technical data that would assist architects, engineers, and HVAC professionals to select the proper products for their projects. A standard commercial product should have the following information:

  • Listed specific material and grade used as the primary composition material
  • Comprehensive product performance data: flow rate, static pressure, noise level and more
  • For project specific enquires regarding our products, please contact our product specialists at +1-604-437-1527.


Additional Details:

  • Time-proven (Since 1997) professional & commercial grade linear slot diffusers made with 6063-T5 Grade Extruded Aluminum. This type of aluminum has a relatively high tensile properties, provides excellent finishing characteristics and is highly resistant to corrosion.
  • This product is tested in accordance to:  ADC1062:GRD-84  (ADC1062R4) and ASHRAE 70-2006 “Method of Testing the Performance of Air Outlets and Air Inlets (ANSI approved)”. Our air ventilation products are constantly under research and redevelopment utilizing today’s testing standards and computational fluid dynamics simulation (CFD) energy models.
  • Rich powder coated finish with a strong aluminum profile and reinforced tig-welds prevent cracking, chipping and bent corners. Our linear slot diffusers include a weather stripping seal to prevent ceiling smudging caused by some substandard performance air vents with air leakage issues.
  • We have been producing quality 1 to 12 slots linear diffusers for the HVAC industry since 1997.


22" Linear Slot Diffuser HVAC air vent cover


Linear slot diffusers 25-2 size chart