Work processes that require cleanrooms and controlled environments are optimised with our individual, reusable and easy-to-clean MATADOR cleanroom solutions.

What is a cleanroom?

Most cleanrooms installed today (over 90 percent) are positive pressure rooms that are categorised according to ISO 14644-1 2015 cleanroom classifications, which ranks cleanrooms according to the number of particles per cubic meter by micrometre size.

This is an effective way of classifying overpressure cleanrooms – and indicating how “clean” they are – because positive pressure rooms are designed to expel air and any particles that may arise in them.

This is in contrast to negative pressure rooms, which are designed to trap contaminants in the room – a useful operation when dealing with infectious diseases, pathogens, or other biological and toxic hazards that you don’t want to release from a controlled environment.

Skov Industri offers both overpressure cleanrooms and underpressure cleanrooms via our MATADOR Cleanroom solutions, including:

  • ISO 8, ISO 7, ISO 6 og ISO 5 cleanroom
  • GMP A, B, C og D cleanroom
  • cGMP cleanroom
  • USP cleanroom

And we make sure machines and equipment can get into the cleanroom even after it’s built.

Read more about cleanrooms at our learning centre here

The sustainable Clean room solution

Das nachhaltige Reinraum System

Overpressure – Cleanroom

This is how pressure chambers work.

To understand ISO positive-pressure cleanroom classifications, one first needs to understand how these cleanrooms work.

The clean air in a pressurised cleanroom is produced by drawing air into the cleanroom through a series of HEPA (High-Efficiency Particle Air) and/or ULPA (Ultra Low Particulate Air) filters. This provides a clean air environment and creates pressure in the cleanroom.

With air pressure in the room greater than the pressure in the surrounding environment, the air inside the positive pressure cleanroom is subsequently pushed out of the room through ventilation ducts. With this, the pollutants leave due to processes carried out inside the room. At the same time, the higher pressure inside the room stops pollutants from entering the room via exit ventilation ducts.

Read more about cleanrooms at our learning centre here

Person sluice gates with interlock, which here control six doors in total; if one door is opened, the other five doors lock automatically

Classifications of overpressure rooms

With purified air being drawn in and pollutants being pushed out, positive pressure cleanrooms are classified according to the concentration of airborne particles inside them and the size of those particles – the goal is to minimise the number and size of particles in a cleanroom through continuous pressure and frequent air exchange.

The ISO standard for cleanroom classifications 14644-1, introduced by the International Organization for Standardization, has been in force since 2001. It classifies cleanrooms by cross-referencing the size of the measured particles (e.g. 0.5 μm) with the maximum number of particles of that size per m3 that can be accepted in a cleanroom of that type.

ISO 14644-1 Cleanroom classifications

ISO cleanroom classifications are largely consistent with the older US Federal Standard 209, which was in
effect from 1998-2001. Although it has been officially 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 given in m3

Watch video about Cleanrooms

Approximate comparison of ISO 14644-1, FS 209 and EU GMP

Requirements for ventilation, ACH

Other classifications of cleanrooms

In addition to keeping the concentration of airborne particles below a certain limit, cleanrooms for microelectronic installations must also take care of the air change rate (ACR) according to an addendum to the ISO 14644-1 standard. This factor is also becoming important for medical and pharmaceutical manufacturing.

ACR is measured in air changes per hour (ACH), which can be determined by measuring the total airflow volume supplied to – or vented from – the cleanroom.

Almost all ISO classes can be correlated to a recommended ACH range. Finding the correct ACH for an application will depend on a variety of factors, including the number of employees in a cleanroom, the processes used inside the cleanroom, and the typical frequency of entries and exits from the cleanroom.

As a result, we always work closely with the ventilation providers.

Read more about cleanrooms at our learning centre here

HEPA/ULPA filtre i loftet sørger for renheden i et renrum.

HEPA/ULPA filters in the ceiling ensure the cleanliness of a clean room.

ACH areas for ISO Cleanroom classifications

Rule of thumb for number of air changes per hour according to ISO 14644-1 classes


Choosing the right cleanroom is a complicated but important decision for any company that needs to maintain cleanroom standards and controlled environments in its production environment.

Read more about cleanrooms at our learning centre here

Skov Industri offers both overpressure cleanrooms and underpressure cleanrooms via our MATADOR Cleanroom solutions.

Contact us and we can discuss the best way to meet your cleanroom needs – as well as your general production requirements.

Hospitaler bruger renrum.

Hospitals use cleanrooms.

MATADOR – The Sustainable Cleanroom

Pressure-tight, sustainable and extremely easy to clean.

Grouting MATADOR wall joints achieve a perfectly sealed, smooth, and highly easy-to-clean surface. The hypoallergenic and clean environment is therefore ideal for operating rooms, laboratories, cleanroom production and other controlled environments.

MATADOR – ‘room-in-room’ supplied complete with flooring and soundproofing of ceiling with sound absorbing hygiene ceilings. A standard version or solutions designed according to the specific classifications can be chosen.

Ceilings and hygienic ceilings for cleanrooms are supplied for easy installation of light and ventilation.

Flooring, floating floors, and floors prepared for ventilation according to individual ISO requirements.

Special windows, doors, locks and gates for cleanrooms, several solutions can be offered, including automatic and interlock.

Roof structures are dimensioned for loads from the large ventilation units, etc.

We establish both Cleanroom person sluice gates and Cleanroom goods sluice gates.

MATADOR walls for cleanrooms are a quick means of establishing zoned cleanroom classifications. Also in older unclassified rooms and buildings.

A flexible, easy-to-clean and 100% recyclable Cleanroom solution that also reduces noise.

Read more about cleanrooms at our learning centre here

Contact us to learn more about our cleanroom solutions.

4 m bred og 3 m høj dobbeltdør betyder at nye maskiner/udstyr kan komme ind i renrummet efter behov

4 m wide and 3 m high double door means new machines/equipment can enter the cleanroom as needed

Technical characteristics, approvals & sound data, etc.

All steel components for MATADOR steel partitions are phosphated and powder coated. This surface treatment ensures that they effectively resist the influences of the surrounding environment, and at the same time are extremely easy to clean.

Powder coating is carried out in-house using colours according to the RAL scale. This is done with a film thickness of min. 70 my and with a gloss (60 degrees) 75 +/-5. There is adhesion (DIN53151 – 2mm) Gt 0.

When we apply this coating, the walls are suitable for use in environments with corrosion class 3 (DS412). If the requirements for corrosion protection are higher, we can meet them by additional measures.

MATADOR walls are available in several standard colours but can be supplied in virtually any RAL colour at extra cost.

MATADOR walls have a modular structure.

The cassettes have a thickness of 1.25 mm with a width of 900 mm and a height of 1035 mm (or 517.5 mm). These measurements apply to both wall cassettes, windows and doors.

By using standard dimensions and a unique clip system, we can quickly and economically make changes or replace components that have been damaged.

By using the same components for all wall types and for both high and low walls, we ensure 100% recycling when rebuilding.

MATADOR walls can be used as partitions up to 9 m high.

60 mm single sheet wall without insulation for physical separation.

60 mm double sheet wall with insulation, for general room separation or high-efficiency noise reduction.

150 mm double post construction with insulation, for extreme noise reduction or as fire-resistant BS-60 separation.

The walls can be made with sound absorbers to reduce reverberation time and regulate room acoustics.

MATADOR walls are available with corridor doors, sliding doors, double doors, loading gates, sound locks, etc. These are delivered either in standard execution or adapted to the actual task.

Both assembly and disassembly are made easy with the unique and patented clip solution.

The powder coating is done in our own plant with colours according to the RAL scale. Here you see our standard colours, but almost all RAL colours are possible.

Many years of practical experience in noise reduction are the foundation for effective and functional solutions to noise problems at companies. Skov Industri offers individual total solutions, primarily based on self-produced MATADOR walls and MATADOR wall partitions.

The results shown are a transcription of original test reports.

A full description of the test is given in the test report..

The test was conducted by Skandinavisk Lydteknik.

Please contact Skov Industri if you need a presentation of the original test reports or if you have any other questions about acoustics, noise and MATADOR walls.

Flexible & Sustainable

Our MATADOR walls are modular and can be built up and taken down as often as you like.

As a result, they are sustainable, which is good for both the customer’s economy and the environment.

Wall modules can be replaced with, e.g. windows, doors, gates, locks etc., i.e. high flexibility when changes
in needs arise.

We don’t leave a mess when we assemble or disassemble, so production can often carry on running at the same time.

Our highly experienced fitters build in approximately half the time compared to other wall types.

Our MATADOR walls and wall partitions are easy to clean.

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