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Easy Swap Adaptor Plenums for Air Conditioners

Catalog Number: PLM28G28

Industry Standards:

Maintains NEMA Type 12 rating when properly installed on a Type 12 enclosure. NEMA Type 12 IP 54


When existing air conditioners are damaged or have reached end-of-life, EASY SWAP Adaptor Plenums provide a quick and easy means for attaching newer Hoffman® air conditioners to the cut-out left on the enclosure.


  • No modification of the enclosure required - designed to match the enclosure cut-out and mounting holes of the air conditioner being replaced
  • Plenum design allows for optimum air flow (vs. a flat plate that can block the air intake and air outtake left by the older air conditioner)
  • Gasket included
  • Specifications:

    18 gauge steel


  • Painted to match the standard Hoffman® air conditioner color (light gray)
  • Other colors available upon request
  • Notes:

  • To quickly identify the correct air conditioner and plenum download the spec sheet from the Downloads tab or download the Easy Swap app from Apple App or Google play stores
  • Please contact Customer Service for support in finding an appropriate cross for older Hoffman/McLean models not shown above.
  • Prior to ordering, ensure Adaptor Plenum dimensions do not exceed available space on the enclosure mounting surface.
  • ISC is a registered trademark of ISC Sales, Inc.
  • Kooltronic is a registered trademark of Kooltronic, Inc.
  • Pfannenberg is a registered trademark of Pfannenberg Incorporated
  • Rittal is a registered trademark of Rittal Corporation
  • Adaptor Plenums for Rittal are not suitable for replacing partial-recessed or fully-recessed mounted air conditioners.
  • Thermal Edge is a registered trademark of Thermal Edge, Inc.
  • Technical Data
    Easy Swap Adaptor Plenums for Air Conditioners
    Catalog Number
    Air Conditioner Manufacturer To Replace Hoffman/Mclean
    Height (in.) 28.5
    Width (in.) 17.00
    Depth (in.) 1.50
    No accessories available.