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Plenum Box for CMJ500/455/453/450


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This easy to install Plenum box is a universal solution for any false ceiling application. Featuring the only slide-on lid design in the industry, this solution is the simplest and easiest to install into virtually any application, specializing in low ceiling environments. Includes several key features that allow for complete internal cable routing.

There are no universal models in this line. Please use Mount Finder above to check for dedicated (model-specific) mounts.

* Standard FEDEX ground shipments for USA's lower 48 states included. For shipments outside of this area costs will apply. Expedited shipping is available at an additional cost. If you wish to expedite your shipment please phone in your order to Peerless Customer Care 1-800-729-0307.



  • Compatible with all of Peerless’ false ceiling plates
  • Simple lockdown with slideable lid and optional lockdown screw
  • Mounting brackets allow for multiple attachment points
  • 3 inches (76mm) of lateral adjustment for precise placement
  • ½” (13mm), ¾” (19mm) and 1” (25mm) knockouts to run conduit
  • Optional internal knockouts for clean installations in any circumstance