FFU and Terminal Air Purification Equipment

Side-Discharge Fan Filter Unit

A vertical-format FFU that draws return air through its rear inlet and delivers uniform HEPA-filtered air horizontally across equipment or a clean zone.

Horizontal Clean Airflow
Vertical Wall Format
Rear or Top Air Intake
Uniform Front Diffuser

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Product Introduction

This side-discharge fan filter unit reorients the conventional ceiling FFU into a vertical cabinet for horizontal supply. The rear service section contains an EC centrifugal fan and prefilter, while the full-height front face holds the HEPA or ULPA panel and perforated diffuser. Adjustable feet or a wall frame support the assembly without consuming overhead grid space. The broad discharge face is useful for sweeping contamination away from low-mounted filling, inspection or packaging equipment that cannot be protected effectively by a downward ceiling module.

Key Features

The vertical filter face supplies a broad horizontal flow path directly across the protected work level.

A rear or top inlet can be selected to suit wall clearance and local return-air direction.

Internal equalising baffles reduce the velocity gradient between the fan centreline and cabinet edges.

Adjustable levelling feet and wall anchors stabilise the tall cabinet while leaving the front face unobstructed.

Customer Product Concerns

Some processes need clean air across the working plane rather than from above, especially where machines or services occupy the ceiling.

A dense overhead service zone leaves no clear ceiling bay for a conventional FFU.The vertical cabinet moves the fan and final filter to the wall or floor line while preserving filtered supply.

Downward air is blocked by tall equipment before it reaches exposed product surfaces.Horizontal discharge enters at process height and sweeps directly across the critical work zone.

A small outlet jet creates turbulence and dead corners along a wide production line.A full-height HEPA face and diffuser distribute airflow across a larger lateral area.

Tall freestanding modules can move or tilt during filter service.A wide base, levelling feet and optional wall restraint provide stable installation and repeatable alignment.

Typical Applications

Low-clearance clean boothsPharmaceutical filling linesPrecision inspection stationsFood packaging zonesClean transfer corridors

Technical Parameters

Representative cabinet construction for a side-discharge fan filter unit is summarized below.

Core Material	Backward-curved EC fan, micro-glass HEPA or ULPA pack and aluminium airflow equalising baffle
Panel Thickness	350-520 mm cabinet depth
Effective Width	610-1220 mm active discharge width
Maximum Length	Up to 2000 mm complete vertical cabinet height
Steel Facing Thickness	1.0-1.5 mm powder-coated steel or 304 stainless-steel side-discharge casing
Core Density	Approximately 90-120 kg/m³ compacted density of the particulate filter pack
Thermal Conductivity	Approximately 0.035-0.043 W/(m·K) for the particulate pack installed across the side-discharge air path
Surface Finish	White low-shedding powder coat with grey base and anodized aluminium diffuser
Joint Type	Compression-seal filter frame with gasketed rear service panel and bolted floor or wall mounting
Customization	Available based on the intended application and operating environment.

Available Options

Single- or twin-module discharge faceRear inlet or top duct collarFixed feet or locking castersHEPA or ULPA final filter

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