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Sandwich® Access Door - Single Pane Observation

Basic Use

Sandwich Observation Doors provide easy access into air ducts and units and allow for viewing the inside of the duct.  This door was developed to provide a solid, leak proof door that is simple to install.


Access door which allows inspection of the inside of the duct without door removal.

Special Characteristics

  • 4” x 2-5/8” viewport
  • Safety glass used for window
  • Tested to 20” w.g. with no leakage noted
  • Tested to negative 10” w.g. with no leakage noted
  • No frame to install
  • Effortless opening and closing (no tools required)
  • No measuring (self-adhesive template provided)
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