FFU and Terminal Air Purification Equipment

EC Fan Filter Unit

An electronically commutated FFU that combines efficient variable-speed airflow, digital monitoring capability and a low-profile backward-curved impeller.

Brushless EC Motor
Continuous Airflow Adjustment
0–10 V or Network Control
Low Electrical Heat Gain

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Product Introduction

The EC fan filter unit uses an electronically commutated brushless motor integrated with a backward-curved impeller. The motor electronics regulate speed efficiently across a broad operating range and can accept local, 0–10 V or network commands. An aluminium plenum reduces installed weight, while the sealed final-filter interface and uniform diffuser maintain the clean-air path. The architecture suits dense FFU ceilings where individual monitoring, coordinated airflow changes and reduced electrical heat are important.

Key Features

Brushless electronic commutation avoids the slip losses associated with a conventional induction motor at reduced speed.

A backward-curved impeller maintains useful efficiency as filter resistance increases through its service interval.

Low-voltage control ports support individual setpoints or coordinated adjustment from a cleanroom control panel.

A compact top controller exposes operating status without opening the filter compartment.

Customer Product Concerns

Large FFU arrays need efficient part-load operation and repeatable control without adding excessive cabling or heat above the ceiling.

Hundreds of independently adjusted units drift to different airflow rates after filter loading.Addressable EC controllers allow setpoints and operating feedback to be managed by zone rather than only at each ceiling bay.

Reducing airflow with an induction-motor voltage controller wastes power and can increase motor temperature.Integrated electronic commutation regulates motor torque efficiently across the usable speed range.

A dense ceiling produces substantial sensible heat that must be removed by the cooling system.The efficient motor and backward-curved wheel reduce electrical input and associated heat rejection at the same operating point.

Technicians cannot identify a stalled unit until local cleanliness or pressure has already changed.Optional network status and alarm contacts expose motor operation to the supervisory control system.

Typical Applications

Large unidirectional-flow cleanroom ceilingsSemiconductor and microelectronics productionBiotechnology processing areasFacilities with centralized airflow monitoringEnergy-sensitive recirculating cleanrooms

Technical Parameters

Typical construction ranges for a network-capable EC fan filter unit are provided below.

Core Material	Anodized-aluminium plenum, backward-curved EC impeller and micro-glass HEPA or ULPA mini-pleat filter
Panel Thickness	230-440 mm overall module depth
Effective Width	532-1132 mm manufactured module width
Maximum Length	Up to 1132 mm standard module length
Steel Facing Thickness	0.8-1.0 mm optional powder-coated or stainless-steel access skin
Core Density	Approximately 90-120 kg/m³ nominal compacted density of the HEPA or ULPA micro-glass pack
Thermal Conductivity	Approximately 0.035-0.043 W/(m·K) for the dry HEPA or ULPA pack fitted to the EC-driven FFU
Surface Finish	Natural anodized aluminium with a powder-coated diffuser and colored closed-cell perimeter gasket
Joint Type	Gasketed drop-in ceiling flange with gel-seal or compression-gasket final-filter interface
Customization	Available based on the intended application and operating environment.

Available Options

200-240 V or multi-voltage EC motor0–10 V, Modbus or local handheld controlH14, U15 or U16 final filterTop-side or room-side replaceable fan and filter

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