Cleanroom Utility Systems

Exhaust HEPA Filter Housing

Fully welded stainless single-stage duct housing with a gasketed side-access door, positive filter clamp and pressure/test interfaces for a compatible exhaust HEPA element.

Single full-size side-access HEPA module
Positive door and filter sealing architecture
Welded duct housing with pressure-test interfaces

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Product Introduction

The Exhaust HEPA Filter Housing is a conventional side-access enclosure for installing one compatible full-size HEPA element in a cleanroom or controlled-process exhaust duct. A welded 304 stainless shell forms the pressure boundary, while an internal spring or crank mechanism presses the filter gasket against a continuous sealing surface. The hinged service door uses multiple compression latches, and red/blue pressure taps provide clean- and dirty-side connections for resistance monitoring. A compact test port can support the selected in-place test arrangement. This model intentionally uses ordinary direct service access rather than a bag-in/bag-out barrier, making it appropriate only where the maintenance hazard assessment permits exposed filter handling.

Key Features

Fully welded cabinet construction limits bypass paths through folded or mechanically fastened seams

Opposed rectangular duct flanges provide a compact straight-through exhaust connection

A positive internal clamp holds the filter consistently against its gasket sealing surface

Four adjustable compression latches load the access-door gasket around the full perimeter

A hinged service door supports routine filter access without removing the housing from the duct

Color-coded pressure taps simplify connection of a differential-pressure gauge or transmitter

An optional aerosol test port can be located to match the selected validation method

Internal filter guides help position a full-size element before the locking mechanism is engaged

Natural stainless surfaces suit frequent external cleaning in controlled utility spaces

Horizontal or vertical airflow orientation can be configured with suitable support and access clearances

Customer Product Concerns

A sound housing cannot compensate for the wrong filter, damaged gasket or poor service clearance; sealing, airflow and maintenance access must be verified together.

A filter can appear seated while a folded gasket creates a bypass pathInspect the gasket and sealing surface, use the positive clamp evenly and verify the installed assembly with the selected leak-test method.

Door distortion or uneven latch adjustment can compromise the service-opening sealSet all compression latches to apply uniform gasket load and replace damaged door seals before returning the housing to service.

A high-efficiency element may overload the fan when its resistance is not included in system designSelect the filter and fan together using clean and loaded resistance, required airflow and the complete duct pressure balance.

Pressure taps on the same side of the filter cannot show true element resistanceConnect sensing points to the designated upstream and downstream chambers and verify tubing polarity before trending differential pressure.

Direct filter access may expose maintenance personnel to captured materialUse this conventional housing only after hazard review; specify a BIBO containment housing when the filter cannot be safely exposed.

Insufficient side clearance can prevent the filter from being withdrawn without damageReserve the full door swing and filter-removal envelope in the plant layout, including room for handling and temporary containment.

Typical Applications

Non-contained cleanroom return and exhaust branchesPharmaceutical process-support spaces with a documented safe filter-change methodHospital, laboratory and isolation-room exhaust where direct service access is acceptableMicroelectronics utility exhaust requiring final particulate filtrationBiosafety cabinet or equipment exhaust connections outside high-containment service conditionsPilot plants and controlled manufacturing areas using a single duct-mounted HEPA stage

Technical Parameters

The displayed basis is one fully welded single-stage 304 stainless side-access housing for a nominal 610 x 610 mm full-size HEPA element. Its representative envelope uses approximately 635 mm cabinet width/depth, 692 mm overall height and 1.9 mm 14-gauge-class shell. In the site's fixed ten-row schema, Panel Thickness and Steel Facing Thickness both describe the single stainless pressure-boundary sheet rather than a sandwich panel. Filter efficiency, airflow, gasket type, test ports and pressure duty are selected for the intended exhaust system.

Core Material	Fully welded 304 stainless steel housing with stainless filter guides, positive clamping mechanism, gasketed access door and selected elastomer seals
Panel Thickness	Approximately 1.9 mm 14-gauge-class stainless housing wall for the selected single-cell display basis
Effective Width	635 mm nominal cabinet width for one standard full-size 610 mm filter module, excluding external latch projection
Maximum Length	692 mm representative overall housing height for one full-size filter high, excluding duct transitions and service clearance
Steel Facing Thickness	Approximately 1.9 mm 304 stainless pressure-boundary sheet with no separate decorative facing layer
Core Density	Approximately 8000 kg/m³ representative density for austenitic stainless steel sheet
Thermal Conductivity	Approximately 15 W/(m·K) near room temperature for representative austenitic stainless steel
Surface Finish	Natural-silver brushed or 2B stainless exterior with black latches and restrained red/blue pressure-port caps
Joint Type	Continuous welded cabinet seams, gasketed bolted duct flanges, compression-latched service door and positive gasket-seal filter clamp
Customization	Available based on the intended application and operating environment.

Available Options

304L or 316L stainless steel constructionGasket-seal or gel-seal compatible internal frameHalf-size, full-size or multi-filter housing arrangementsUpstream prefilter track with a separate service doorHorizontal, vertical-up or vertical-down airflow orientationDifferential-pressure gauge or transmitter packageAerosol injection and upstream/downstream sampling portsInsulated double-wall cabinet or high-temperature constructionRound, rectangular or custom transition duct connections

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