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A2i Air Handling Unit

Air Treatment Engineered for Every Controlled Environment

Cleanroom SPCS laminar flow air treatment

SPCS

Operating theater, isolation room, ICU, recovery room...

Ultra-clean corridor SPCI laminar flow

SPCI

Research laboratories, pharmaceutical industry, animal facilities, microelectronics, precision mechanics and industrial processes.

The Most Compact & Modular AHU

Our Air Handling Units are designed to meet the most demanding requirements in terms of hygiene, energy performance, and control systems. Discover the key features that make the difference in the field.

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Plug and Play

Integrated Regulation & Automation

The Plug & Play solution incorporates all the regulation and automation required to control your installation straight out of the box. This design enables precise management of operating parameters and optimized energy performance.

  • Automatic control of airflow, temperature, humidity and pressure.
  • Smart regulation : Programmable energy-saving modes (scheduling, supervision).
  • Free cooling
  • Local and remote monitoring.
CTA filtration system with G4 F7 F9 air filters
Integrated filtration

Optimal Airflow with High-Performance Filtration

Our air treatment systems deliver optimal airflow and consistent pressure while ensuring effective filtration and contamination control in cleanroom environments.

  • G4 to F9 intake filters, F7 to H14 supply air filters
  • Airflow rates up to 33,000 m³/h depending on the filter configuration.
  • ISO 14644-1 compliance: ISO Classes 5 to 8
Certifications and compliance

Structural Integrity & Regulatory Compliance

Designed for the most demanding environments, our AHUs are built to the highest manufacturing standards.

  • Double-skinned painted electro-galvanised steel panels
  • Leakage class L2, deflection class D1, thermal classification T2 / TB2 (EN 1886)
  • Simplified maintenance access: removable hinged panels
  • NFS 90-351 compliant condensate drip tray
Central air handling unit A2i
Central air handling unit A2i
Central air handling unit A2i

Energy Performance
& EC Motor

EC Fans: High Efficiency, Lower Energy Consumption

EC fan technology continuously adjusts speed to match the required airflow, significantly reducing energy consumption. This delivers up to 30% energy savings compared to conventional asynchronous motors — without compromising aeraulic performance or stability.

Reliable, High-Performance Air Management

The integrated system continuously monitors and controls airflow, temperature, humidity and pressure — ensuring stable, precise conditions at all times.

Compact plug and play A2i air handling unit
Reduced mode interface

Standby mode

Automatically reduce operation based on time schedules to minimize energy consumption during low-activity periods and optimize energy consumption management.

Heat Exchangers

Heat exchangers are selected according to the facility's requirements and the constraints of the environment to be treated. The design takes into account air speed and expected performance to ensure stable temperature and humidity regulation. Anti-corrosion protection can be integrated to guarantee the durability of the equipment in demanding environments.

Copper heat exchangers, details, HVAC, heating, cooling
Graph of variations

Constant Airflow Regulation

The fan self-regulates to maintain a constant airflow by automatically compensating for pressure drops.

Designed for High-Risk
Healthcare Facilities

Risk 4

Very High Infectious Risk — Risk Level 4

Areas with very high infectious risk require centralized air treatment with enhanced filtration and precise airflow control to minimize airborne contamination.

Areas of application

Orthopaedic theatres, organ transplant theatres, burns operating theatres, protected unit rooms (haematology), cytostatic reconstitution, parenteral solution manufacturing.

Recommended Equipment

  • SPCS-type AHU with F6/F7/F9 filtration
  • H14 HEPA laminar flow terminal ceiling filtration
  • Laminar flow zone air velocity: 0.25 to 0.35 m/s
  • Air intake in the lower sections, at the periphery of the room
  • Air exhaust (volume lower than fresh air supply)
  • Fresh air supply ≥ 6 air changes/hour
Cleanroom equipped with air treatment system
Risk 3

High Infectious Risk — Risk Level 3

High infectious risk areas require enhanced air treatment with strict control of airflow, pressure and filtration to limit the spread of pathogens and protect occupants.

Areas of application

Multi-purpose theatres, ENT/ophthalmology and orthopaedic theatres, digestive and visceral surgery theatres, urology, cardiovascular surgery theatres, neurosurgery theatres...

Recommended Equipment

  • SPCS-type AHU with F6/F7/F9 filtration
  • In-room diffusion with individual HEPA filtration (H14)
  • Mixing rate ≥ 15 air changes/hour
  • Air intake in the lower sections, at the periphery of the room
  • Air exhaust (volume lower than fresh air supply)
  • Fresh air supply ≥ 6 air changes/hour
Cleanroom equipped with air treatment system
Risk 2

Moderate Infectious Risks - Risk 2

Moderately infectious risk areas require air treatment to control airborne contamination while ensuring the comfort and safety of patients and staff. Managing airflow, filtration, and air currents helps to limit the spread of infectious agents.

Areas of application

Pre-operative care unit (POCU), post-anaesthesia care unit (PACU), circulation within operating theatres, sterile medical device storage, multi-purpose room, ...

Recommended Equipment

  • Air handling unit type SPCS filtration F6/F7/H13
  • Air dispensed in the area to be treated by simple diffusers
  • ACH rate ≥ 10 vol/h
  • Air intake in the lower sections of the room or ceiling
  • Air exhaust (volume lower than fresh air supply)
  • Fresh air ≥ 6 ACH/hour
White operating theatre room A2i Hospital

Frequently asked questions

The Air Handling Unit

A cleanroom-dedicated or hygienic AHU is an air handling unit designed to ensure air control in contamination-controlled environments.
It maintains temperature, humidity, differential pressure, and particle concentration levels. This type of installation must comply with applicable regulatory requirements. An efficient air handling unit is essential to meet air contamination control standards across various industries, including:
  • Healthcare,
  • Pharmaceutical industry,
  • Biotechnology,
  • Microelectronics,
  • Precision industrial processes.

AHUs must achieve the cleanliness classes defined by the NF EN ISO 14644-1 standard (particle classification), as well as the specific requirements for healthcare facilities defined by the NF S 90-351 standard (risk zones).
From a construction standpoint, the mechanical performance of units is evaluated according to the EN 1886 standard (casing deflection, leakage, thermal transmittance, and thermal bridging).
In public-access buildings (ERP environments), energy performance requirements must also be carefully assessed, taking into account the specific constraints of cleanrooms, particularly the prevention of cross-contamination between fresh and exhaust airflows.

Our hygienic AHUs incorporate filtration stages suited to the targetted ISO classes.
On the intake side, G4 to F9 filters provide pre-filtration. On the supply air side, F7 to H14 filters achieve performance levels compatible with ISO 5 to ISO 8 classes, depending on the room requirements. The choice of filters is determined based on risk analysis, regulatory requirements, and the specific process involved. Our team of specialists can advise you in selecting the most suitable solution.

In a single-flow configuration, the AHU handles air treatment and supply, while air extraction is managed independently.
In a double-flow configuration, the AHU manages both air supply and extraction. This setup enables precise control of differential pressures and improved energy efficiency.
The choice depends on the project constraints, the required containment level, and the overall air handling strategy.

Energy optimization is based on:
  • The use of high-efficiency EC motors,
  • Precise airflow control,
  • Reduced-mode operation based on time schedules,
  • Free cooling in the neutral zone,
  • Absolute humidity control.

Together, these features deliver full regulatory compliance without compromising on energy efficiency.

Yes. Our units are designed for outdoor installation. Frames are built with thermal break aluminium profiles and double-skin insulated panels — though a site-specific study is always recommended to account for local climatic conditions and installation constraints.

Next-generation solutions integrate automation and control systems directly within the AHU. Thanks to this Plug & Play design, the installation of additional modules is not required. This concept reduces technical interfaces and simplifies commissioning.

Sizing is based on several parameters that must be taken into account when preparing the specifications.
  • Targeted ISO class or health risk level,
  • Required air change rate (volumes/hour),
  • Differential pressures to maintain,
  • Internal thermal loads,
  • Architectural and operational constraints.

A precise aerodynamic and thermal study carried out beforehand guarantees the achievement of the expected performance levels and compliance with current standards.

In terms of energy consumption, A2i AHUs are equipped with high-efficiency components throughout. On the supply air side, electronically commutated (EC) fans are used — consuming up to 30% less energy than conventional asynchronous motors.

Similarly to our VAHUs, the air handling units can be equipped with direct expansion coils. Cooling is achieved through heat transfer between the refrigeration circuit and the treated air. In compliance with current regulations, the refrigerant used has no harmful effect on the ozone layer.

Energy recovery systems can also be integrated:

Plate heat exchangers — thermal energy transfer occurs across the entire plate surface for maximum efficiency

Double glycol-water heat exchanger recovery systems — this solution ensures perfect separation between the two air circuits.

Energy recovery units can be integrated directly into the AHU or installed as an external add-on, making them compatible with any air handling unit. By capturing heat from the extracted air, the energy contained in the exhaust stream is transferred back to the incoming fresh air supply — reducing overall energy consumption. This is particularly effective when exhaust air is warmer than the outside air being introduced, maximising energy savings. Heat exchangers enable partial recovery of the energy contained in the exhaust air by transferring it from the outgoing to the incoming airflow.

A2i AHUs are engineered to meet the most stringent hygiene standards for use in healthcare facilities, pharmaceutical industries and any other controlled-atmosphere environment.

Smooth interior surfaces with no grooves or recesses provide long-term protection against micro-organism growth throughout the entire unit. Stainless steel base panels and condensate drip trays effectively prevent moisture retention, while the panel coating ensures flawless hygiene at all times.

Learn More About our AHUs

High-Performance Air Management

Our AHUs handle fresh air supply, air recirculation, exhaust, and precise control of temperature, humidity, room pressure and filtration — all tailored to the specific requirements of each installation.

A2i Air Handling Unit

Air handling unit with A2i control

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Air handling units

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Air handling unit A2i detailed product view