Air Valves – Precise Airflow Control & Ventilation

Air valves are key elements in modern HVAC systems, enabling precise airflow control and efficient ventilation. By regulating the direction and volume of air, supply air valves and exhaust air valves support energy savings, comfort, and healthy indoor air.

Alnor provides high-quality air valves for various applications, ensuring reliable performance, easy installation, and optimal integration with advanced ducting systems.

What Are Air Valves?

Air valves are essential components in ventilation systems, designed to regulate and balance the airflow throughout a building. Their primary function is to control the amount of air being supplied to or extracted from specific rooms, ensuring even distribution and stable pressure within the ductwork.

There are two main types of air valves:
- Supply air valves, which deliver fresh air into the room, and
- Exhaust air valves (also called exhaust valves), which remove stale or humid air from interior spaces.

Alnor's air valves are engineered for seamless integration with oval ducting systems such as FLX-REKU, ensuring minimal airflow resistance and efficient performance. They are manufactured from durable materials such as powder-coated steel or high-grade plastic, selected for their longevity, resistance to corrosion, and ease of maintenance.

Whether used in residential or commercial systems, every air supply valve or ducting valve plays a vital role in maintaining comfort, air quality, and the overall efficiency of a mechanical ventilation setup.

Key Features and Benefits

Alnor air valves combine advanced engineering with practical design to deliver superior performance across all ventilation applications. Their construction and functionality are optimized to meet the highest standards of airflow regulation and durability.

• Precise airflow regulation – Alnor valves feature intuitive adjustment mechanisms that allow installers to fine-tune air exhaust and supply volumes with ease. This helps maintain balanced ventilation throughout the system and ensures compliance with design airflow rates.
• High airtightness – thanks to quality sealing materials and precision manufacturing, the valves prevent uncontrolled leakage. This improves overall system efficiency and supports energy-saving objectives—especially critical in heat recovery installations.
• Low noise levels – the internal geometry is designed to minimize turbulence, resulting in quiet operation even under high airflow conditions. This makes Alnor valves ideal for residential spaces, offices, and other noise-sensitive environments.
• Durable, easy-to-clean materials – made from high-grade steel or impact-resistant plastics, the valves are corrosion-resistant and long-lasting. Smooth surfaces and detachable components simplify cleaning and maintenance.
• Non-return valve option – select models come with an integrated ducting non return valve, effectively blocking backflow and maintaining hygiene and pressure stability in the duct system.

Alnor valves are available in multiple sizes and finishes to match various exhaust air and supply configurations. Options include powder-coated white for discreet ceiling integration or raw finishes for technical spaces. This variety ensures that HVAC professionals can select a solution tailored to both technical and aesthetic requirements.

How Air Release Valves Enhance Ventilation Performance

Air valves play a decisive role in ensuring the ventilation efficiency of any mechanical system. By managing the intake and removal of air, they directly influence the quality, balance, and energy performance of the entire HVAC installation.

• Exhaust air valves are responsible for removing stale, humid, or polluted air exhaust from interior spaces. Positioned in areas such as bathrooms, kitchens, and utility rooms, they support the continuous extraction of unwanted air, helping prevent moisture buildup, odors, and contamination.
• Air supply valves introduce clean, filtered air into occupied spaces. Their design ensures even air distribution, avoiding drafts and improving thermal comfort in living and working areas.

In heat recovery systems, these valves are critical to maintaining pressure balance between supply and exhaust paths. Proper valve selection and calibration help the unit operate within optimal parameters, improving heat exchange performance and minimizing energy loss.

By optimizing airflow paths and minimizing resistance, well-adjusted exhaust air valves and air supply valves reduce the strain on fans and duct systems. This leads to lower power consumption, better indoor air quality, and longer service life for HVAC equipment—making air valves a small but high-impact element of ventilation system design.

Applications and Use Cases

Alnor air exhaust valves and supply air valves are designed for a wide range of residential and commercial ventilation solutions. Their versatility makes them suitable for various building types and functional zones.

In residential settings—such as single-family homes and apartments—supply air valves are typically installed in living rooms and bedrooms to deliver fresh air, while exhaust valves are used in kitchens, bathrooms, and utility rooms to remove moist or polluted air.

In commercial and public buildings—including offices, retail spaces, restaurants, and healthcare facilities—air valves help maintain air quality and comfort for occupants, supporting HVAC system performance even in high-demand environments.

Alnor valves are also used in industrial applications, where controlled air exchange is critical to meet safety, hygiene, or production standards.

Whether for a compact apartment or a large-scale facility, Alnor's air valves meet the needs of both HVAC professionals and project owners—providing reliable, efficient airflow control in every scenario.

Alnor Air Valves – Technical Specifications and Quality Assurance

Alnor air valves are designed to meet the highest technical and quality standards in modern ventilation systems. Available in diameters ranging from 80 to 250 mm, they are manufactured from powder-coated sheet steel (RAL 9016), chrome-nickel, acid-resistant stainless steel, or durable plastic—offering a solution tailored to every installation and interior style.

To ensure compatibility with various ducting valve configurations, Alnor offers both ceiling- and wall-mounted options, including models with drip caps, mesh covers, or non-return features. These valves are suitable for a wide spectrum of domestic and commercial air exhaust and supply applications, including heat recovery systems.

Each valve is engineered for:

• Precise airflow performance, with optimal exhaust air and intake capacity,
• High sealing class, supported by dedicated mounting frames with or without rubber gaskets to prevent leakage,
• Low noise levels, contributing to acoustic comfort in occupied spaces.

All air valves are rigorously tested in Alnor's in-house laboratory to verify technical parameters such as airflow rates, sound pressure levels, and sealing performance. Products conform to relevant EN standards and meet the hygienic certifications required for residential and commercial use.

Alnor's commitment to quality is backed by extensive documentation, available to support HVAC professionals during design and installation. Each product is covered by a manufacturer's warranty, and the company's technical team provides ongoing support to ensure correct system integration and long-term reliability.