Cleanroom Air Distribution Systems

Cleanroom HEPA Supply Air Terminal

A flush ceiling supply terminal that combines a gasket- or gel-sealed HEPA filter, cleanable diffuser face and room-side test access in one final air outlet.

Room-Side HEPA Filtration
Sealed Filter Interface
Cleanable Flush Face
Integrated Test Access

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Product Introduction

The cleanroom HEPA supply air terminal places the final filter at the boundary between the supply duct and the controlled room. A welded steel housing receives the filter against a continuous gasket or gel channel, preventing untreated plenum air from bypassing the media. The removable diffuser face can produce radial, low-turbulence or vertical discharge while leaving the filter accessible from below. Upstream aerosol and pressure ports allow integrity testing and resistance checks without disturbing the ceiling seal.

Key Features

The terminal filter seat applies uniform perimeter compression or gel engagement around the complete HEPA frame.

Room-side removal avoids opening the interstitial ceiling space during routine filter replacement.

Dedicated upstream sample and pressure ports support filter testing from the controlled side of the room.

A smooth powder-coated diffuser face tolerates repeated wipe-down and detaches without exposing fibrous lining.

Customer Product Concerns

A terminal HEPA outlet must prevent bypass, distribute filtered air predictably and allow filter service without damaging the clean ceiling boundary.

Unfiltered air leaks between the HEPA frame and the terminal housing.A continuous gasket or liquid-gel seal closes the full filter perimeter under even clamping pressure.

Filter testing requires drilling temporary ports through the housing.Factory-installed upstream aerosol and differential-pressure connections provide repeatable room-side access.

A diffuser pattern creates excessive velocity directly below the outlet.Interchangeable perforated, radial or low-turbulence faces match the discharge pattern to room duty.

Ceiling access is blocked by services above the terminal.The face panel, filter clamps and filter are all serviceable from the room side.

Typical Applications

Pharmaceutical cleanroomsHospital isolation and treatment roomsBiotechnology laboratoriesMedical-device assembly suitesElectronics clean production areas

Technical Parameters

Typical construction ranges for a room-side replaceable HEPA supply air terminal are summarized below.

Core Material	Glass-microfiber HEPA media in an aluminum frame with polymer gasket or liquid-gel perimeter seal
Panel Thickness	0.8–1.2 mm welded steel terminal housing
Effective Width	305–610 mm nominal filter and ceiling-module width
Maximum Length	Up to 1220 mm for rectangular terminal modules
Steel Facing Thickness	0.8–1.2 mm powder-coated steel casing and diffuser face
Core Density	Approximately 7850 kg/m³ for the steel housing and face-panel structure
Thermal Conductivity	Approximately 45–60 W/(m·K) for the steel housing and face-panel structure
Surface Finish	Smooth white epoxy-polyester powder coating with optional antimicrobial formulation
Joint Type	Gasket- or gel-sealed HEPA filter seat with flanged round or rectangular duct inlet
Customization	Available based on the intended application and operating environment.

Available Options

H13 or H14 HEPA filter configurationPerforated vertical-flow diffuser plateRadial or adjustable-nozzle diffuser faceIntegral pressure-loss transmitter

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