Chief Manufacturing CMA470
Ceiling Box, Plenum, for use with Chief CMS440


The new plenum enclosure for Chief's CMS-440 suspended ceiling kit is designed to provide a convenient storage location for your non-plenum rated cables and equipment. The hinged door provides easy access, and multiple knockouts (.75", 1" and 1.5") are built-in for routing your cables. There are also two mounting locations inside the enclosure for dual-gang surface-mount electrical boxes (not included). Enclosure covers the column location on the suspended ceiling kit to easily route your cables through the ceiling for a clean installation.


  • Hinged door for easy access
  • Includes support for two dual-gang surface-mount electrical boxes
  • Designed for use with the CMS440
  • Plenum-rated
  • Color: White
  • Dimensions: 7" x 14" x 5.5"
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