5500 - Hemispherical Diffuser

Standard Features

  • Type 304 stainless steel
  • High airflow capacity 200 - 1000 CFM
  • Perforated face design has 3/32" diameter holes on 1/4" staggered centers
  • Perforated center face has 3/32" diameter holes on 1/4" staggered centers
  • 13% free area
  • Individually adjustable air pattern controllers for delivering high volumes of low velocity air in radial pattern slightly below ceiling level
  • Built-in screwdriver adjustable damper disk for even distribution and field balancing accessed by removing face plug
  • Removable face plate; secured by 1/4 turn fasteners
  • Safety cables to prevent dropping of face
  • Round inlets for simple duct connection
  • Standard unit designed for both lay-in T-Bar ceiling systems and surface mount applications
  • Integral earthquake hanger tabs
  • Minimum dimensions: 12"x12"
  • Maximum dimensions: 60"x48"
  • #4 satin polish finish

Options (must specify when ordering)
Submittals (Technical Data/Revit)
Cross Reference


No finishes available for this product.


  • HEPA Rack with 9" plenum (5500-HF)
  • Louvered center section
  • Available with aluminum face, white finish only (5500 - AL)
Inlet Options:
  • Side Inlet
  • End Inlet
  • Rectangle Inlet
  • Oval Inlet
No similar or related products available.

Cross Reference

Product Series 
Shoemaker Series Notes 
AJSS Hemispherical Diffuser