All About Perforated Diffusers

Shoemaker perforated diffusers are high quality diffusers that provide a 4-way air pattern. Perforated diffusers are made of steel, with 3/16" holes on 1/4" staggered centers, available with modular core or curved blade air deflection, and surface or T-Bar mount. Hinged faces allow you to adjust the optional damper as needed. Shoemaker perforated diffusers are standard Soft White but are also available in any designer color.

Perforated Diffuser Subgroups

Surface Mount

Surface Mount

  • Perforated surface mount diffusers are available in square sizes, 6x6 to 18x18.
  • Perforated diffusers supply are available in a 1, 2, 3, or 4-way air pattern.
  • Surface mount diffusers come with countersunk mounting holes and color matching Philips Pozidriv screws.
  • Series include: 500CB, 500MA


  • Perforated T-Bar diffusers are available in a 2x2 panel size.
  • Perforated diffusers are available in a 1, 2, 3, or 4-way air pattern, depending on the model.
  • Perforated T-Bar diffusers have collar sizes available in 6"-10", 12", 14" and 16".
  • Series include: 104P, 110, 780, 825CB, 825MA


Q: I have a competitor’s perforated diffuser that I am trying to match. How can I find out what the Shoemaker Mfg. equivalent is?

A: Use our handy Cross Reference.

Q: I need a fire-rated perforated T-bar. Does Shoemaker offer these?

A: Shoemaker does offer a selection of fire rated curved blade T-Bars. Please check out these Fire Rated T-Bars.