The SSEPD Series Perimeter Slot Diffusers are specially designed to provide an air curtain for operating rooms. The SSEPD Series unique slot design creates a continuous curtain of air, angled outwards 15º, that encloses the operating area and minimizes the possibility of contaminated air entering the surgical area. The double slot design creates a uniform velocity curtain that minimizes entrainment of contaminated air into the curtain air stream. It also creates a wider velocity profile with less turbulence and hence less induction over similar two slot designs. The face design also incorporates longitudinal deflectors that horizontally deflect a small amount of air lengthwise thereby joining sections and corners with a truly continuous curtain, resulting in enhanced isolation of the surgical area.

SSEPD – Perimeter Slot Diffuser was last modified: September 22nd, 2025 by
Specifications and Technical Details
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SSEPD Single Slot Room SystemSSEPD Double Slot Lighted Room System
Standard Features
- Type 304 Stainless Steel Construction
- #4 Satin Polished Finish
- The Entire Slot Assembly, Including the Pressure Plate, is Removable for Cleaning and is Secured by 1/4 Turn Fasteners
- Safety Cables to Prevent Accidental Dropping of Removable Face
- 13% Perforated Pressure Plate has 3/32″ Diameter Holes on 60º 1/4″ Staggered Centers
- Plenums have Rounded Corners for Easier Cleaning
- Flanged Inlets for Simple Duct Connection
- Integral Earthquake Tabs
- Designed for Lay-In T-Bar Ceiling Systems & Surface Mount Applications
Optional Features
- Type 316 Stainless Steel Construction
- Aluminum Construction
- Antimicrobial Epoxy Powdercoat Finish Options
- Perimeter Inlet Balancing Dampers, S-44 Opposed Blade Damper (Face Operated & Removable)
- Foil Backed Insulation with (2) Available Sizes: 1.5″ or 2.25″
- Built-In Tunable LED Lights – Eliminates the Need for Additional Light Fixtures; Helps maximize Use of Ceiling Space and Do Not Interfere with the Airstream like Hanging Lights
- Custom fabrication to meet our client’s needs in the field