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Over 1.000 projects worldwide

Cleanrooms

  • More than 20 years of experience
  • Custommade solutions
  • Fast delivery times
  • Danish-made products
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Custom Cleanrooms for Industrial Processes

At Skov Industri, we design, manufacture, and install pressure-tight cleanrooms for multiple industries that require production under sterile or controlled conditions.

Our cleanrooms for businesses are used in industries with strict requirements for hygiene, particle control, and stable operations. With the MATADOR module, which since 1976 has been the core of countless solutions within cleanrooms and noise control, Skov Industri is an experienced partner when cleanrooms need to be designed, produced, and integrated into existing or new production environments.

MATADOR Cleanrooms are developed as modular “room-in-room” solutions, providing maximum flexibility, including the possibility of utilizing and loading the roof structure. A cleanroom from Skov Industri can be established quickly and efficiently – even in older buildings – without extensive reconstruction. At the same time, cleanrooms can easily be adapted if production requirements, space needs, processes, or classifications change over time. This flexibility makes our cleanrooms a future-proof investment for both large and small companies.

  • Custom cleanrooms for industry
  • ISO- and GMP-compliant cleanroom solutions
  • One partner responsible for production, installation, and coordination with professional suppliers of cleanroom doors, lighting, ventilation, etc.
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The sustainable clean room solution

What Is a Cleanroom?

A cleanroom is a controlled production or research environment with defined requirements for cleanliness, particle control, and documentation. The purpose is to maintain stable conditions and minimize the risk of contamination, ensuring quality and safety in sensitive processes.

Today, most cleanrooms are designed as positive pressure cleanrooms, as positive pressure helps keep external particles out. Classification is typically based on ISO 14644-1:2015, where cleanrooms are categorized according to the number of particles allowed per cubic metre of air at different micrometre sizes. This makes it easier to define and document the required level of cleanliness depending on the process and industry.

A negative pressure cleanroom works in the opposite way by containing potentially harmful substances within the room. This is relevant when working with biological or chemical risks, where contamination must not escape into surrounding areas.

MATADOR Cleanrooms are Skov Industri’s modular solution for cleanrooms for businesses and flexible cleanroom systems that can be established as “room-in-room” constructions. The system is developed for controlled environments with a focus on hygiene, noise control, and sound insulation, ensuring that working conditions and process requirements go hand in hand. For this reason, MATADOR Cleanrooms are often used in pharmaceutical production, biotechnology, electronics, and other high-tech industries where both cleanliness and operational stability are critical.

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Cleanrooms Designed for Operation

A modern cleanroom must not only meet technical requirements but also function efficiently in daily operations. MATADOR Cleanrooms combine high hygiene standards with effective noise control, which is a significant advantage in industrial production environments. Our cleanrooms contribute to an improved working environment by reducing noise levels without compromising cleanliness.

Surfaces in each cleanroom are smooth, sealed, and easy to clean, minimizing the risk of particle accumulation and contamination. At the same time, the robust construction ensures that cleanrooms can withstand loads from both production and technical installations. All cleanroom solutions can be delivered with integrated ceilings, hygienic ceiling systems, flooring systems, doors, windows, airlocks, and gates.

A cleanroom constructed with MATADOR walls allows ventilation systems to be placed directly on the cleanroom roof. The MATADOR system is a strong wall construction capable of supporting significant loads on the roof. This is particularly useful, as cleanrooms often require roof structures that carry ventilation units, duct systems, water tanks, and more.

The MATADOR module allows optimal use of space, as modules and walls can be adapted in length, width, and height. We rarely encounter challenges that cannot be solved with this wall system – we can expand, extend, or reduce spaces with efficient material use and streamlined installation.
Doors, openings, penetrations, etc., are designed neatly according to customer requirements and in collaboration with other suppliers involved in the project.

Cables are routed within the walls between cassettes and posts, ensuring smooth surfaces both inside and outside the cleanroom. Hygiene and visual finish are always considered in our solutions.

Another advantage of this system is that if a wall is damaged, a cassette can be replaced very quickly. The joint is cut open, the cassette is removed using suction cups, a new cassette is installed, and a thin seal is applied – allowing production to resume quickly. It should be noted that the cassettes are very strong and typically only dent slightly if impacted.

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This is what our customers say

★★★★★
The consultancy is competent, and your walls can be converted and reused, which we have done many times. Your fitters are creative and fast, leaving a high finish. And last but not least, the noise is often muffled more than promised
Lars Riis
Lars RiisDS Smith
★★★★★
SPT Vilecon is very pleased to use you as a supplier and the flexible design of your walls for our cleanroom for the production of "High-end Medical Devices
Søren Endersen
Søren EndersenSPT Vilecon
★★★★★
It is always a pleasure to work with the Skov Industri organisation, and this applies at all levels. We have many new projects in the pipeline, and of course, you will be bidding for them.
Bo Skovning
Bo SkovningEnvases Europe

FAQ About Cleanrooms and MATADOR Cleanrooms

A cleanroom is a controlled environment where air cleanliness, particle levels, and pressure are regulated to ensure hygiene and contamination control. Cleanrooms are commonly used in research, laboratories, and production requiring sterile or controlled conditions.

A positive pressure cleanroom has higher pressure than its surroundings and prevents particles from entering. A negative pressure cleanroom contains contamination inside, which is relevant when handling hazardous substances.

We deliver ISO 8, ISO 7, ISO 6, and ISO 5 cleanrooms.

  • ISO classification defines requirements for design, construction, ventilation, maintenance, and particle testing. An ISO cleanroom does not necessarily meet GMP standards.
  • GMP classification (Good Manufacturing Practice) sets stricter requirements for production processes in medical manufacturing. GMP cleanrooms include both ISO and GMP classification requirements, with additional demands for materials, ventilation, operation, validation, and personnel.

MATADOR Cleanrooms are pressure-tight, easy to clean, and modular “room-in-room” solutions, making them ideal for industrial and controlled environments where hygiene, noise control, and flexibility are essential.

Skov Industri collaborates with professional ventilation suppliers to achieve correct airflow. We dimension the roof to handle required loads, including ventilation systems.

Yes. MATADOR Cleanrooms can be installed in both new and existing buildings and used for zoning areas that previously had no cleanroom classification.

Cleanrooms are commonly used in pharmaceutical production, biotechnology, laboratories, medical devices, and high-tech industries where cleanliness and documentation are critical.

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Positive and Negative Pressure in Cleanrooms

Skov Industri delivers both positive and negative pressure cleanrooms in accordance with ISO 14644-1 as well as GMP, cGMP, and USP requirements. Positive pressure cleanrooms are typically used in production where preventing external contamination is critical. The positive pressure ensures that air and particles are pushed out of the cleanroom.

In a positive pressure cleanroom, clean air is supplied through HEPA filters (High-Efficiency Particulate Air) and, in some cases, ULPA filters (Ultra Low Particulate Air). Filtration removes particles, allowing the cleanroom to maintain the required cleanliness according to ISO 14644-1.

At the same time, stable pressure is created by supplying more filtered air than is exhausted. As a result, air flows outward through controlled supply and exhaust systems, carrying away particles generated by processes within the cleanroom. This helps maintain a stable and controlled environment.

Another key benefit of positive pressure is that it acts as a barrier against external contamination. Because air flows outward, it becomes significantly more difficult for particles to enter through openings, joints, or ventilation systems. The result is a more consistent and secure environment.

To understand ISO positive pressure classifications, it is necessary to understand how these cleanrooms operate.

Clean air is created by drawing air into the cleanroom through HEPA and/or ULPA filters. This creates a clean environment and builds pressure within the room.

Because the pressure inside is higher than in the surrounding environment, air is pushed out through ventilation systems, carrying contaminants generated inside. At the same time, the higher pressure prevents external contamination from entering through exhaust systems.

With filtered air entering and contaminants being expelled, positive pressure cleanrooms are classified based on particle concentration and particle size. The goal is to minimize both the number and size of particles through continuous pressure control and frequent air exchange.

The ISO 14644-1 standard, introduced in 2001 and updated in 2015, classifies cleanrooms by cross-referencing particle size (e.g. 0.5 μm) with the maximum allowable number of particles per cubic metre.

ISO 14644-1 cleanroom classifications
ISO cleanroom classifications largely align with the older US Federal Standard 209, which was in effect from 1998 to 2001. Although it has officially been out of use for years, it is still widely cited and can be easily cross-referenced with ISO classifications.

Note that ISO 14664-1 is stated in m3.

ISO classifications largely correspond to the older US Federal Standard 209, which is still widely referenced.

To understand ISO classifications for positive pressure cleanrooms, it is first important to understand how a positive pressure cleanroom operates in practice.

In a positive pressure cleanroom, clean air is created by supplying air into the room through HEPA filters (High-Efficiency Particulate Air) and, in some cases, ULPA filters (Ultra Low Particulate Air). The filtration removes particles from the air, allowing the cleanroom to maintain the required level of cleanliness in accordance with ISO 14644-1. At the same time, a stable air pressure is established because more filtered air is supplied than is exhausted.

When the pressure inside the cleanroom is higher than in the surrounding areas, the air will naturally flow out of the cleanroom through controlled exhaust outlets and ventilation paths. The outgoing air carries away particles and contamination generated by processes and activities within the cleanroom. In this way, the positive pressure helps maintain a stable and controlled environment.

An important effect of positive pressure is that it also acts as a “barrier” against external contamination. Because the air moves outward, it becomes significantly more difficult for particles to enter the cleanroom through openings, joints, or ventilation ducts. The result is a safer and more consistent environment, where cleanliness and documentation can be maintained over time.

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Ventilation Requirements in Cleanrooms: ACH, ACR, etc.

In addition to maintaining airborne particle levels within the limits defined by ISO 14644-1, several industries also impose requirements on ventilation and air exchange in cleanrooms. This is particularly relevant in microelectronics facilities, where air change rate (ACR) requirements are standard, and the same focus is increasingly seen in medical and pharmaceutical production, where stable operation and documentation are critical.

ACR indicates how quickly the air in a cleanroom is replaced and is typically measured as ACH (air changes per hour). ACH can be calculated by measuring the total airflow supplied to the cleanroom or the volume of air extracted, depending on the system design and pressure strategy.

For almost all ISO classes, recommended ACH ranges exist, but the correct ventilation always depends on how the cleanroom is used in practice. It is influenced by factors such as the number of personnel in the cleanroom, process equipment, heat load, particle sources, and how frequently access occurs through doors, airlocks, and gates. As a result, two cleanrooms with the same ISO classification may have different ACH requirements depending on operation and workflows.
As a supplier of cleanroom solutions, we work closely with ventilation providers during both design and installation to ensure that air exchange, filtration, and pressure conditions match the required classification and your production needs.

Read more about cleanrooms in our knowledge centre here, or contact us for guidance on ventilation, ACH, and cleanroom requirements.

General guideline for air changes per hour according to ISO 14644-1 classes.

MATADOR Cleanrooms are designed for sustainability and long service life. Each cleanroom is 100% reusable and can be expanded, dismantled, relocated, or rebuilt. This reduces both resource consumption and long-term costs.

Skov Industri supports customers throughout the entire process, from initial needs assessment and technical consultancy to design, production, and installation.

The result is proven cleanroom solutions that support stable processes, high product quality, and documented compliance.

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Pressure-Tight and Sustainable Cleanrooms

The cleanroom wall is delivered as MATADOR wall modules, which are 60 mm thick and form a strong and adaptable load-bearing structure. When the joints in MATADOR cleanroom walls are sealed, a pressure-tight solution is achieved with a completely smooth and highly easy-to-clean surface. This creates a clean and hygienic environment suitable for laboratories, clean production, operating areas, and other controlled environments where hygiene and particle control are critical.

The MATADOR wall supports the cleanroom roof structure, which is dimensioned to carry loads from ventilation units and technical installations.

A MATADOR Cleanroom is delivered as a complete “room-in-room” solution with pressure-tight steel ceilings and ISO 5-approved acoustic ceiling panels. Cleanroom ceilings and hygienic ceiling systems are delivered with pressure-tight integration of lighting, air supply, and exhaust fixtures. The installation is simple, efficient, and operationally reliable.

Floor solutions can be adapted with floor coverings, floating floors, or floors prepared for ventilation according to the relevant ISO requirements. We collaborate with professional partners for specific components to ensure high quality and long service life of materials.

Skov Industri supplies windows, doors, airlocks, and gates for cleanrooms, including solutions with automation and interlock systems.

We establish personnel airlocks and material airlocks to ensure that flow and zoning support the required level of cleanliness. We also ensure that machines and equipment can be moved into the cleanroom, even after it has been constructed. Contact us if you would like to learn more about our cleanroom solutions and cleanrooms for industry.

Each cleanroom is designed with a focus on flow, access conditions, and zoning, ensuring that people, materials, and equipment move correctly through the cleanroom. Personnel airlocks, material airlocks, and interlock systems are integrated directly into the cleanroom to minimize the risk of cross-contamination. Industrial cleanrooms can be designed with large door openings and gates, allowing machines and production equipment to be moved in and out of the cleanroom through material airlocks, even after the cleanroom has been put into operation.

A cleanroom must always be adapted to the industry and the processes it is designed to support. At Skov Industri, we develop cleanrooms for businesses where requirements for traceability, validation, and documentation are an integrated part of the solution. Our cleanroom solutions are widely used in pharmaceutical production, biotechnology, laboratories, medical devices, and other high-tech industries, where even small deviations in a cleanroom can have significant consequences for product quality and safety.

Each cleanroom is designed with a focus on flow, access conditions, and zoning, ensuring that people, materials, and equipment move correctly through the cleanroom. Personnel airlocks, material airlocks, and interlock systems are integrated directly into the cleanroom to minimize the risk of cross-contamination. At the same time, industrial cleanrooms can be designed with large door openings and gates, allowing machines and production equipment to be moved in and out of the cleanroom, even after it has been put into operation.

With a MATADOR Cleanroom, companies get a documented, flexible, and scalable solution that supports both current and future requirements. Skov Industri ensures that each cleanroom functions as a stable, controlled, and efficient production environment.

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Choose the Right Cleanroom for Your Production

Choosing the right cleanroom is a critical decision.

With a MATADOR Cleanroom, you invest in a scalable, reusable, and sustainable solution. Cleanrooms can be expanded or reduced, and roofs can support full ventilation systems.

Contact us to discuss your needs and how we can integrate a cleanroom into your production environment.

At Skov Industri, we deliver pressure-tight rooms with a strong and flexible wall system, the quality of which has been recognized and in demand since 1976. With a MATADOR Cleanroom, you invest in a solution that is scalable, reusable, and sustainable. The cleanroom can be expanded or reduced, and the roof can be designed to support the entire ventilation system. With this wall system, we deliver cleanrooms from 20 m² to 800 m² in ISO Classes 9, 8, 7, 6, and 5.

Customers also appreciate the short downtime – if a wall cassette is damaged, it can be replaced efficiently within minutes. It is also possible to keep a cleanroom in very good condition over many years by replacing individual cassettes as needed.

Contact us to discuss your requirements and how we can best integrate a cleanroom into your production environment.

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