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Cleanroom Air Distribution Systems
Perforated Face Air Diffuser
A ceiling diffuser with a fully perforated removable face that equalizes discharge over the panel area for gentle vertical or low-turbulence supply air.
- Uniform Perforated Face
- Low-Turbulence Discharge
- Pressure-Equalizing Plenum
- Tool-Free Face Access
Product Introduction
The perforated face air diffuser slows supply air in a rear plenum and releases it through hundreds of evenly distributed openings rather than a few concentrated slots. An internal equalizer or distribution plate reduces high velocity directly below the duct inlet, helping the full visible face remain active. The flat powder-coated panel sits flush with a modular cleanroom ceiling and can be released from below for cleaning. Supply and extract variants use the same restrained appearance, allowing coordinated terminal layouts in controlled rooms.
Key Features
The rear equalizer limits the central hot spot normally produced by a direct top duct connection.
A flat removable panel leaves no deep vanes that trap lint at the room face.
Matching supply and extract configurations maintain a consistent ceiling appearance.
Customer Product Concerns
Perforated diffusers only work uniformly when the plenum removes inlet momentum and the complete face remains clean and unobstructed.
Most airflow exits through the holes directly under the inlet spigot.A distribution screen and sufficient plenum depth spread static pressure across the rear of the face.
Small perforations retain surface dust that is difficult to wipe from a fixed panel.A detachable face can be washed or wiped from both sides away from the ceiling frame.
Sharp perforation burrs disrupt cleaning cloths and create particle traps.Deburred punched holes and a continuous powder coating produce a smooth cleanable surface.
Uneven ceiling framing bows the panel and opens perimeter gaps.A rigid return-edge frame supports the face while a compressible gasket follows the ceiling plane.
Typical Applications
Low-turbulence cleanroom supplyHospital clean treatment roomsLaboratory preparation spacesPharmaceutical weighing support roomsClean corridor and change-area ceilings
Technical Parameters
Typical construction ranges for a cleanroom perforated-face ceiling diffuser are listed below.
| Core Material | Deburred perforated steel face with galvanized pressure-equalizing plenum and internal distribution plate |
|---|---|
| Panel Thickness | 0.8–1.2 mm perforated face and plenum sheet |
| Effective Width | 300–600 mm nominal active face width |
| Maximum Length | Up to 1200 mm for rectangular perforated modules |
| Steel Facing Thickness | 0.8–1.2 mm punched steel face panel |
| Core Density | Approximately 7850 kg/m³ for the steel perforated face and equalizer |
| Thermal Conductivity | Approximately 45–60 W/(m·K) for the steel perforated face and equalizer |
| Surface Finish | White epoxy-polyester powder coat over fully deburred steel, with stainless option |
| Joint Type | Flush gasketed frame with hinged or lift-out perforated face and sealed plenum spigot |
| Customization | Available based on the intended application and operating environment. |
Available Options
Vertical low-turbulence or horizontal spread equalizerSupply or extract configuration304 stainless-steel perforated faceSquare or rectangular ceiling module
Planning a Perforated Face Air Diffuser specification?
Send us your dimensions, installation conditions, performance targets and required surface finish.
