Author: Izabella Lundberg, CEO, Airfi
Airfi’s product development brings together Finnish innovation expertise, intelligent technology and real customer needs. Airfi designs, develops, tests and manufactures its air handling units in Raisio, Finland. In-house expertise in mechanical engineering, electronics and software development enables solutions that make ventilation more energy-efficient, reliable and easier to design, install and operate.
Airfi is a fully Finnish-owned developer and manufacturer of air handling units. The company was founded in 2018 in response to customer demand for a new kind of manufacturer – one that understands the entire air handling unit, from its mechanical structure to its electronics and software. This philosophy continues to guide Airfi today. The aim is to develop solutions that address real customer needs while boldly challenging established industry practices. We don’t want to do things a certain way simply because that’s how they’ve always been done. We want to find out how they can be done better.
In-House Product Development Makes Ventilation More Intelligent
A modern air handling unit is much more than a mechanical device equipped with automation. Energy-efficient, intelligent ventilation requires mechanical engineering, electronics and software to work seamlessly together.
Airfi’s strength lies in bringing these areas of expertise together through its in-house product development. With a thorough understanding of the entire technology, Airfi can develop its products as integrated systems and respond quickly to changing customer needs.
Mechanical, Electronics and Software Expertise Under One Roof
Antti Pulkkanen, Airfi’s Product Development Manager, is responsible for the mechanical design of its products. His expertise includes the structural design of air handling units and their performance under demanding Nordic climate conditions.
Jan Lundberg, Chairman of Airfi’s Board of Directors, is responsible for electronics and circuit board design and leads the software development team.
Together, these areas of expertise form the foundation of Airfi’s product development. The company understands how its air handling units operate, from their mechanical components to the smallest details of their software. For customers, this means solutions designed as complete systems. Mechanical performance can be optimised through software, while control systems can be developed to make the most effective use of each unit’s structural characteristics.
For Airfi, an intelligent air handling unit is not simply about having a modern user interface. Intelligence is built into the way the entire product operates.
Continuous Testing Improves Product Performance
The Nordic climate places particular demands on air handling units. This is why Airfi invests in its own testing facilities, where product performance can be studied and developed under controlled conditions.
Airfi has its own cold chamber, along with larger testing and simulation facilities. These allow the company to investigate heat recovery performance, frost formation and prevention, energy consumption and continuous ventilation operation under different operating conditions.
Having testing facilities in-house accelerates product development. Software modifications can be tested under controlled conditions, while mechanical solutions can be refined based on measurement results. This process also generates valuable data on how air handling units behave in different situations, helping Airfi continuously improve reliability, energy efficiency and control performance.
At Airfi, product development is not a one-off project but an ongoing process. Product performance continues to be monitored, tested and improved even after the units have entered the market.
Product development does not end when a product is completed. It continues throughout the product’s entire lifecycle.
Independent Measurements Provide Confidence in Air Handling Unit Selection
Selecting an air handling unit requires reliable technical information. For HVAC designers and developers in particular, it is essential that performance data is comparable and based on measured results. This is why Airfi’s air handling units undergo testing not only in the company’s own facilities but also through laboratory measurements carried out under FINAS accreditation.
Independently measured data supports product comparisons and technically sound design decisions. Key parameters include airflow rates, energy consumption and acoustic performance.
Customers should not have to rely solely on a manufacturer’s claims. We want to support product performance information with independent measurement data.
Airfi’s MVHR Calculation Programme Supports HVAC Designers
Airfi provides HVAC designers with a free downloadable air handling unit selection and sizing tool. The software allows designers to evaluate unit performance under project-specific design conditions.
The tool was developed by Insinööritoimisto W. Zenner Oy, which also carries out FINAS-accredited laboratory measurements for Airfi products. The software provides a comprehensive range of technical information relevant to practical HVAC design. This includes, for example, the sound power level radiated into the surrounding space through the air handling unit casing, helping designers assess the unit’s impact on acoustic conditions in plant rooms and technical spaces.
The purpose of the tool is to simplify air handling unit selection and provide designers with reliable information to support technically informed decisions. At Airfi, reliable technical data is not something that should remain solely in the manufacturer’s hands. It should also be available to customers and designers.
Airfi’s Innovations Solve Real-World Ventilation Challenges
Airfi’s long-term commitment to product development has resulted in new technical solutions and patented innovations. These are driven by practical ventilation challenges and real customer needs.
AFPS™ Helps Manage Frost Formation in Heat Recovery
One of Airfi’s best-known innovations is AFPS™ (Airfi Frost Pro System), a patented adaptive frost prevention system. AFPS™ uses intelligent, adaptive control to manage frost formation in the heat recovery system. Its purpose is to maintain energy-efficient and reliable ventilation performance even during cold winter conditions.
The solution demonstrates how combining mechanical engineering and software development can create new ways of addressing technical challenges in ventilation.
Airfi Refit 10 Simplifies Air Handling Unit Replacement in Renovation Projects
Another example of customer-driven product development is the Airfi Refit 10 replacement air handling unit, for which Airfi has filed a patent application covering its new technical solution
Airfi Refit 10 has been designed to simplify the replacement of existing air handling units with new, energy-efficient models. The solution is based on combining an air handling unit with interchangeable connection modules. This allows a single AHU platform to replace potentially hundreds of different existing air handling unit models.
Depending on the installation, the new unit can be fitted without ductwork modifications or with only minor changes. This can speed up installation, reduce renovation work and make the process easier for both installers and building owners. For Airfi, innovation is not just about introducing a new technical feature. It must deliver real value to designers, installers, building owners or end users.
Finnish Design and Manufacturing Bring Expertise Closer to Customers
Airfi is a fully Finnish-owned company, with product development and manufacturing based in Raisio, Southwest Finland.For Airfi, being Finnish means more than simply manufacturing products in Finland. It also means having in-house engineering and technology expertise, taking responsibility for product development and maintaining close cooperation with customers. When mechanical, electronics and software specialists work together on the same product, customer feedback can be brought directly into the development process.
The experiences of HVAC designers, installers and other industry professionals help identify areas for improvement and inspire new solutions. Airfi was founded in response to customer demand. Today, customer needs continue to shape what the company develops next.
Long-Term Development Has Also Earned Recognition
Airfi has continued to grow and invest in product development despite challenging market conditions in the construction industry. In 2025, the company was named Company of the Year in Southwest Finland. The recognition marks an important milestone in Airfi’s journey, which began in 2018. Alongside its growth, Airfi remains committed to its core strengths: in-house technological expertise, agility and close customer relationships.
The Future of Ventilation Is Built on Finnish Expertise and Customer Needs
Increasing building energy efficiency requirements, indoor air quality, intelligent automation and the need to renovate existing building stock are shaping the future of ventilation. For Airfi, these developments create opportunities to deliver increasingly effective solutions for both new buildings and renovation projects.
Our goal is not simply to meet today’s requirements. We want to help define the ventilation solutions that will be needed in the future.
Airfi’s strength lies in its comprehensive understanding of air handling unit technology. Developing mechanical systems, electronics and software under one roof enables integrated product design, thorough testing and continuous improvement.
Airfi understands and controls the technology behind its air handling units from end to end, enabling customers to benefit from more reliable, energy-efficient solutions that are easier to design and install. This in-house innovation expertise is reflected in practical solutions such as the AFPS™ frost prevention system, the Airfi Refit 10 replacement solution and design tools based on independent measurement data.
To develop genuinely more intelligent ventilation, you need to understand your product inside out. Airfi’s ambition is not merely to follow developments in the ventilation industry, but to help drive progress together with its customers. We want to be a company that has the courage to challenge conventional solutions and move the entire ventilation industry forward.
Frequently Asked Questions About Airfi’s Product Development
Where are Airfi’s air handling units designed and manufactured?
Airfi’s air handling units are developed and manufactured in Raisio, Southwest Finland. Airfi is a 100% Finnish-owned company.
How does Airfi’s in-house product development benefit customers?
In-house expertise in mechanical engineering, electronics and software enables Airfi to develop its products as integrated systems. This allows the company to respond quickly to customer feedback and develop solutions based on real operating needs.
How is the performance of Airfi’s air handling units verified?
Airfi tests its products in its own testing facilities and also uses FINAS-accredited laboratory measurements. Independently measured performance data supports product comparisons and HVAC design.
What is Airfi AFPS™?
AFPS™, or Airfi Frost Pro System, is a patented adaptive frost prevention system. It manages frost formation in the heat recovery system and supports energy-efficient air handling unit operation in cold conditions.
How does Airfi Refit 10 simplify ventilation renovation projects?
Airfi Refit 10 uses interchangeable connection modules, allowing a single AHU platform to replace a wide range of existing models. Depending on the site, installation can be completed without ductwork modifications or with only minor changes.
Explore Airfi’s Ventilation Solutions
Explore Airfi’s air handling units, the Airfi Refit 10 replacement solution and the selection and sizing tool for HVAC designers. Find the solution that best meets your project’s needs.
Airfi Oy – Finnish innovation expertise and customer-driven ventilation development.
