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5300 Series

The Nailor Series 5300 Diffuser Plenums are designed specifically to fit the Series 5000 'Ice Tong' Linear Slot Diffusers.

They have been designed for flexible duct connection with a model to suit each of the various frame/sub-frame 5000 Series combinations available. For drywall ceiling mounted applications the plenums are installed separately. Unless there is access to the ceiling space, the plenum is intended to be installed during the drywall installation. Most applications of this type utilize concealed mounting straps on the 5000 Series. The plenums may be supplied with a hemmed leg into whichthe mounting straps snap or they locate in extrusion slots on sub-frames as the linear is drawn up to the plenum from below the ceiling.

The Series 5300 Plenums save on-site fabrication and field labor. When room lay-out changes occur, the plenums can besimply relocated to satisfy the re-arrangement of air distribution requirements. The Series 5300 Plenums maximize the Series 5000's performance. The airflow discharge maintains a horizontal patternthat is close and tight to the ceiling throughout the full range of cataloged air volumes. Excellent for variable air volume applications. 


The Series 5300MP Modified Performance Plenums are fabricated in a similar manner to the Series 5300 with the additionof internal sloping baffles for reduced throw and increased spread of the air pattern.



  • Standard nominal lengths are 20", 24", 30", 36", 48" and 60" (500, 600, 750, 900, 1200 and 1500 mm).
  • Widths available to fit Model Series 5000 and 5000R with 1, 2, 3 or 4 slots.
  • Easily installed with flexible duct.
  • End caps can be folded up to allow continuous runs with the plenums.



  • Optional internal insulation. Model Series 5300I and 5300IMP.
  • ID Inlet dampers are available.
  • EX External Foil Back insulation. 



  • Corrosion-resistant steel.


5350(I) 1/2" Slot Standard
5375(I) 3/4" Slot Standard
5310(I) 1" Slot Standard
5350(I)MP 1/2" Slot Modified Performance
5375(I)MP 3/4" Slot Modified Performance
5310(I)MP  1" SLot Modified Performance

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    The Model Series 4900 Linear Bar Grilles have been specially designed to provide the precision quality appearancerequired for architectural excellence with crisply sculptured styling, careful workmanship and effective air distribution.
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    The FlowLine™ FLH Series continuous slot diffuser is designed primarily for ceiling applications. 
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