Solutions for airflow control and safety of ductwork systems
The performance of a ductwork system does not rely solely on its initial design or on the selection of air handling equipment: it primarily depends on proper control of airflow rates, as well as on the safety and durability of installed components.
In this complex environment, dampers, valves, louvres, and accessories each play a strategic role in:
At F2A, each solution is designed to be part of an overall performance approach, aligned with functional, regulatory, and operational constraints, whether for new-build or renovation projects.
Key functions of a high-performance ductwork system
An efficient ductwork system must meet several technical and functional requirements:
Airflow adjustment and control: Ensure the right airflow rate for each zone
Insulation and protection of equipment and ductwork: Enable maintenance without service interruption and protect against external conditions (frost, humidity, intrusions, etc.)
Protection against backflow and overpressure: Maintain system stability and protect sensitive components
Compliance with fire safety and smoke extraction requirements: Ensure compartmentalization and smoke control to guarantee safety and safe evacuation of occupants
Reliable interface with the external environment: Ensure efficient air exchange while limiting pressure losses and the risk of fouling or degradation
A comprehensive approach to a high-performance, sustainable, and responsible ductwork system
At F2A, we believe that a holistic approach is key to ensuring the consistency and efficiency of your ductwork system as a whole. This involves not only the technical quality of our solutions—but also a strong commitment to Corporate Social Responsibility (CSR):
We integrate environmental performance into the design of our products and the management of our processes by optimizing the consumption of materials and energy, promoting waste recovery, and prioritizing responsible sourcing, in line with our ISO 14001-certified CSR approach.
Our climate strategy includes reducing greenhouse gas emissions, measured annually through a comprehensive carbon footprint assessment (Scopes 1, 2, and 3), and recognized by independent certifications (EcoVadis and Greenly silver medals).
Common applications of F2A solutions
Air balancing in ventilation ductwork systems
In any air handling or ventilation system, air balancing is an essential technical operation to ensure uniform and efficient air distribution. It helps optimize the control of ventilation systems, ensure thermal comfort, and guarantee compliance with energy performance requirements.
An unbalanced HVAC system leads to pressure imbalances, excessive energy consumption, premature wear of components, and discomfort for occupants. Conversely, a well-balanced ductwork system, equipped with appropriate components such as dampers, contributes to airflow control and the overall performance of the installation.
F2A ventilation dampers are industrial HVAC components designed to meet all critical functions of airflow control, depending on the building configuration and its uses:
CONTROL DAMPER
The control damper enables precise airflow adjustment in each section of the ductwork, ensuring optimal air balancing during both commissioning and operation.
FROST PROTECTION DAMPER
The frost protection damper protects installations by preventing cold air from entering air handling units, thus avoiding freezing of coils and heat exchangers.
ISOLATION DAMPER
The isolation damper allows a section of the system to be temporarily shut off for maintenance or emergency operations, without interrupting the main ductwork system.
AIRTIGHT DAMPER (EN 1751)
The airtight damper (EN 1751) provides tight shut-off, essential for applications requiring high airtightness (laboratories, cleanrooms, data centers, etc.).
Thanks to a wide range of solutions — all compatible with manual or motorized actuators — F2A supports HVAC professionals in the design, control, and optimization of complex ductwork systems, across a wide range of environments such as commercial buildings, industrial settings, sensitive areas, and offshore installations.
F2A offers a complete range of airflow dampers, designed as true HVAC components dedicated to the control and balancing of ventilation ductwork systems. Each ventilation damper is developed to meet the technical, regulatory, and environmental requirements of its intended applications.
Our solutions are suited to a wide variety of applications:
Thanks to robust design, suitable materials, and a wide range of control options, F2A ventilation dampers integrate efficiently into ventilation system control strategies, both in new construction and in the renovation or extension of existing systems.
HVAC control dampers play a central role in the air balancing of ventilation and air handling systems. They enable precise adjustment of airflow in each section of the ductwork, both during commissioning and throughout the entire operational phase.
In complex HVAC systems, pressure losses, variations in duct lengths, or changes in usage can lead to significant imbalances. Control dampers help correct these discrepancies and ensure uniform air distribution—an essential condition for thermal comfort, indoor air quality, and overall energy performance.
As a key component of air balancing, the control damper is an essential solution to ensure the reliability, precision, and long-term performance of modern ventilation systems.
Ensure precise airflow control, zone by zone or room by room
Effectively compensate for pressure losses inherent in complex ductwork systems
Enable dynamic rebalancing in multi-zone or evolving installations
Ensure compliance with regulatory airflow rates and HVAC design requirements
Contribute to the stability of ventilation system control and to the reduction of energy consumption
F2A control dampers are available in several configurations to adapt to the constraints of each HVAC project:
The HVAC frost protection damper is an essential component in ventilation systems connected to the outside or exposed to cold climatic conditions. It protects sensitive installations—particularly air handling units, coils, and heat exchangers—against the risk of freezing.
In cold environments such as rooftop installations, outdoor AHUs, unheated spaces, or offshore installations, incoming air can cause sudden cooling of equipment. This phenomenon can lead to frost formation, damage to coils, or even a complete shutdown of the air handling system.
The frost protection damper acts as a mechanical barrier that automatically closes when excessively low temperatures are detected. Integrated into the control of the ventilation system, it ensures active thermal protection.
As a true industrial HVAC component, the F2A frost protection damper is designed to ensure thermal safety and the long-term reliability of HVAC installations, even in the most demanding environments.
Prevent frost-related damage to heating coils, chilled water coils, or direct expansion systems
Protect components exposed to outdoor air in cold environments
Ensure continuity of service of HVAC installations, even in low temperatures
Improve operational reliability of equipment in sensitive areas (AHUs, technical ducts, heat recovery ventilation systems)
Easily integrate into thermal control systems with temperature sensors, thermostats, or automation systems
F2A frost protection dampers are available with several options depending on site requirements:
The airtight damper is a strategic component in the management of complex ductwork systems. It allows a section of the ventilation system to be locally shut off, whether for maintenance operations, safety purposes, or to temporarily isolate a zone without impacting the rest of the installation.
In large-scale projects (industrial platforms, hospitals, laboratories, production sites), it is often necessary to intervene on part of the system without shutting it down completely.
The airtight damper provides this operational flexibility while ensuring service continuity in unaffected areas.
More than just a shut-off device, the airtight damper is a key control component for your ductwork systems, ensuring safety, flexibility, and operational responsiveness.
Enable safe maintenance and inspection operations
Isolate zones in case of failure, incident, or contamination
Manage alternative operating scenarios (unoccupied areas, reduced operation, smoke extraction, etc.)
Allow precise zoning of the ductwork system in large installations
Limit the spread of polluted air, odors, or contaminants
F2A airtight dampers are designed to adapt to all types of HVAC environments:
In installations requiring strict control of air leakage, the airtight damper (Class 4 according to EN 1751) is essential. It ensures effective and measurable shut-off, in compliance with the airtightness levels defined by the EN 1751 European standard, up to Class 4—the highest level under this standard.
Class 4 represents the minimum requirement to qualify a damper as an airtight solution, with a maximum leakage rate of 0.12 l/s·m². However, for particularly demanding applications—especially in the nuclear sector or high-containment laboratories—required leakage rates may be as low as 0.00039 l/s·m², requiring specific designs, enhanced sealing systems, and adapted validation protocols.
Choosing an F2A Class 4 airtight damper in accordance with EN 1751 ensures full control of airflow, optimal containment, and high-precision regulation in critical environments.
These dampers are used in environments where the conveyed air must remain confined or strictly controlled, including:
- Cleanrooms and laboratories (pharmaceutical, biotechnology, microelectronics)
- Data centers
- Healthcare facilities and operating rooms
- Sensitive industrial environments (nuclear, fine chemicals)
- Classified installations and ATEX environments
Prevent any uncontrolled air leakage between separate zones
Maintain differential pressure in controlled environments
Reduce energy loss caused by unwanted air leakage
Meet HQE, BREEAM, RE2020, or LEED requirements for energy efficiency and airtight performance
Strengthen safety measures in high-risk installations
F2A airtight dampers are designed to deliver certified performance:
HIGH-PERFORMANCE SMOKE EXHAUST DAMPERS
For tunnels, metros, and large commercial buildings
Smoke exhaust dampers are essential safety components in HVAC ductwork systems, contributing to mechanical smoke extraction systems. They enable the control, direction, or shut-off of air and smoke flows in the event of a fire, while also fulfilling airflow balancing and control functions during normal operation.
Compliant with fire safety regulations, these dampers ensure a fast and reliable response in building safety scenarios. In complex infrastructures such as road or rail tunnels, metro networks, stations, or car parks, smoke extraction is a critical factor for occupant safety and operational continuity.
F2A smoke exhaust dampers enable:
Efficiently channel and extract smoke and hot gases
Maintain tenable refuge areas and evacuation routes
Limit the longitudinal and transverse spread of smoke
Facilitate emergency response operations
Ensure airflow compartmentalization under extreme conditions
F2A smoke exhaust dampers are specifically designed for applications with demanding airflow and thermal requirements:
Beyond their role in fire situations, smoke exhaust dampers for tunnels, metros, and large commercial buildings contribute to the structuring and balancing of ventilation systems, ensuring precise control of airflow, consistent operation of installations, and full alignment between airflow performance and fire safety.
Fire safety of ductwork systems for offshore environments
In offshore, marine, wind farm, and Oil & Gas environments, fire compartmentation of ventilation systems is both a regulatory and operational requirement. Fire dampers play an essential role.
The fire damper for offshore ventilation is an HVAC safety component designed to prevent the spread of fire and smoke through ductwork systems in marine and offshore environments.
In these high-risk settings (oil platforms, FPSOs, industrial vessels, offshore wind farms), fire compartmentation is essential to protect people, equipment, and the continuity of critical operations.
F2A A0/A60 fire dampers are designed to close automatically in the event of excessive heat, ensuring the integrity of fire-rated partitions while integrating seamlessly into offshore HVAC systems and monitoring systems.
Their role is essential and enables:
Stop the spread of fire and smoke through ventilation ductwork systems
Maintain the integrity of technical compartments (A0/A60 – FTP/SOLAS certification)
Withstand extreme conditions: temperature, pressure, corrosion, vibrations
Integrate into marine HVAC systems and industrial automation systems
Ensure passive fire protection as required by international regulations
F2A fire dampers are rectangular dampers designed for installation in the ventilation ductwork systems of offshore platforms, vessels, and industrial installations.
They meet both fire safety requirements and severe environmental constraints.
Certified in accordance with MED 2014/90/EU and compliant with the IMO FTP Code (SOLAS), these products are suitable for HVAC applications where safety and regulatory compliance are essential.
Protection against unwanted airflow and overpressure in HVAC systems
The backdraught damper is an essential industrial HVAC component in ventilation and air extraction systems. It prevents any unwanted reverse airflow in ducts, thus avoiding reversed air circulation, cross-contamination, and system efficiency losses.
In HVAC systems, internal pressures can vary from one circuit to another, leading to unwanted backflows caused by uncontrolled pressure differences. The backdraught damper acts as a one-way barrier: it opens automatically under the effect of outgoing airflow, then closes when it stops, preventing air from flowing back.
Compact, reliable, and easy to integrate, the backdraught damper is an essential passive safety element in any well-designed ventilation network.
It is particularly useful in installations:
- With individual extractors or multiple units
- Subject to frequent pressure variations
- Where air hygiene is critical (laboratories, hospitals, food industry)
- In natural or assisted aeration systems
Prevent the return of stale, humid, or contaminated air
Protect equipment (fans, filters) against reverse airflow
Maintain the overall performance of ventilation systems
Maintain the overall performance of ventilation systems
Preserve indoor air quality in sensitive areas
Reduce heat losses when the system is stopped
F2A backdraught dampers are available in several configurations:
The pressure relief damper is an air safety device designed to evacuate excess pressure in a ventilation network or in a confined space when it exceeds a defined threshold.
It operates automatically to stabilise pressure, protect equipment, and ensure proper system operation.
In buildings with controlled environments (laboratories, technical rooms, hospitals, data centres), pressure variations can cause imbalances, air leakage, or malfunctions. The pressure relief damper opens as soon as the internal pressure exceeds its setpoint, allowing temporary discharge of air to the outside or to a buffer zone.
The pressure relief damper is a strategic HVAC component, particularly in air handling projects where controlling differential pressures is essential to ensure performance, safety, and regulatory compliance.
Maintain differential pressure between two zones (e.g. overpressure in a clean room, negative pressure in an ATEX area)
Protect HVAC equipment from the effects of overpressure (casings, ducts, ATUs)
Secure controlled-pressure environments (operating theatres, cleanrooms)
Prevent uncontrolled air leakage or structural damage
Contribute to passive regulation of air systems
F2A pressure relief dampers are designed to meet the most stringent performance standards:
Interface with the external environment
External ventilation louvres are essential components of any air handling system connected to the outside. They provide both mechanical and weather protection for air intakes and exhausts, while maintaining the aerodynamic performance of the installation.
Designed to withstand the most severe weather conditions (wind, rain, snow, dust, pollution), F2A external louvres play a key role in ensuring the durability of HVAC systems. They protect internal components (coils, filters, fans) against water, leaves, insects, and even sand projections.
F2A external ventilation louvres are façade components that are both functional, durable, and aesthetically designed to effectively protect the interfaces between the building and the external environment.
These louvres are compatible with all types of buildings:
- Commercial buildings (office buildings, schools, hotels, public buildings)
- Industrial (factories, warehouses, technical rooms)
- Logistics warehouses
- Critical infrastructure (hospitals, data centres)
- Offshore buildings or those exposed to harsh weather conditions
Filter incoming outdoor air without excessive pressure loss
Prevent intrusion of unwanted elements (water, debris, animals)
Protect HVAC equipment air inlets and outlets
Integrate aesthetically with architectural facades
Ensure long-term durability of air system components
F2A louvres are designed to meet the most stringent performance standards:
Acoustic louvres are designed to provide aerodynamic protection while delivering significant noise attenuation for air intake and exhaust systems in buildings.
They are particularly suitable for applications where noise levels must be controlled at the source or near HVAC equipment (air handling units, fans, extract systems, condensers, or rooftop installations).
Thanks to an optimised blade geometry and integrated acoustic materials, F2A acoustic louvres reduce noise levels without compromising airflow performance.
As a true technical and acoustic interface, F2A acoustic louvres combine aerodynamic efficiency with sound attenuation, while meeting environmental and architectural requirements.
They are recommended for projects:
- Located in dense urban or residential areas
- Subject to strict acoustic regulations
- With high sensitivity to environmental noise (hospitals, schools, hotels)
- Requiring façade attenuation or noise control at technical air discharge
Reduce noise generated by ventilation systems
Ensure efficient airflow while attenuating sound
Improve acoustic comfort for occupants and surrounding areas
Integrate into new or refurbishment HVAC systems
Provide a 2-in-1 solution: protection + attenuation
F2A acoustic louvres are designed to meet the most stringent performance standards:
How to choose the most suitable solution?
Selecting an HVAC component should never be arbitrary. It must be based on a precise functional analysis:
- What type of application (commercial buildings, industrial process, marine)?
- What is the required function (regulation, isolation, safety, protection)?
- What is the installation configuration (in-duct, façade, rooftop, technical area)?
- What are the environmental constraints (ATEX, frost, humidity, corrosion)?
- Which regulations apply (public buildings, commercial, etc.)?
- What are the maintenance and accessibility requirements?
To ensure consistency and overall performance of your air system, we invite you to complete the document below, which is essential for analysing your needs.
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