Leading Cleanroom Design Manufacturers

Technological advances and the development of complex instrumentation have necessitated purified environments to avoid contaminating components and parts from atmospheric particles and bacteria. Clean rooms were developed in the middle of the 20th Century to create the ideal tool for providing conditions for the production, manufacture, and fabrication of modern technological tools and instruments. Read More…

>Cleanroom Design Clean rooms and all of their constituent parts and accessories are subject to extremely strict standards and regulations. These standards are set by a variety of governmental and international standards-setting bodies including the United States government and the ISO. These standards are necessary because of the sensitivity of operations conducted in clean rooms.

As a manufacturer of clean rooms, including inplant modular offices, exterior steel buildings, guard buildings, fork liftable and crane liftable buildings, multi-level buildings and mezzanines, Abtech offers turnkey installations or packages for install by end user. Our modular structures are constructed of steel, are free-standing & manufactured under strict quality control methods.

Abtech, Inc. $$$

For the very best of clean rooms, look no further than Clean Rooms International! We can provide the ultimate in quality, customer service, durability, and unique designs just for you!

Clean Rooms International, Inc. $$$

Cleanrooms By United is the industry’s premier manufacturer of modular clean room systems. We design, manufacture and install our clean rooms to meet our customers’ unique requirements. The custom, flexible, modular construction of our cleanrooms makes them easy to expand, reconfigure, or relocate as your cleanroom needs evolve.

Cleanrooms by United $$$

Atmos-Tech Industries is a designer and manufacturer of cleanrooms and equipment for industries, including health care, pharmaceutical aerospace and automotive.

Atmos-Tech Industries $$$

Our design staff is qualified with over 30 years of clean room experience. Our clean rooms are made from the highest quality materials and use a modular design that can be modified to suit any needs.

Clean Air Technology, Inc. $$$

Our complete line of clean rooms will meet your needs. We are the experts of the clean room industry and our engineers can work with you to determine which clean room models work best for your business. We offer a variety of softwall, bio-clean, hardwall, and micro-clean options, all of which are manufactured with the highest standards. You will not be upset with our products. Contact us for more ...

Modular Cleanrooms, Inc. $$$

Bayside Interiors is able to provide the design, engineering and construction of clean rooms. Bayside Interiors Inc. has been around since 1984. We also specialize in the construction of strut framing systems and facility support systems.

Bayside Interiors $$$

BASX Solutions has been designing and manufacturing truly modular cleanrooms since 1984. These are durable, scaleable, portable cleanrooms and are available in both softwall and hardwall designs. Our products meet the highest industry levels, from Class 100 to 100,000. Call for a free quick quote.

BASX Solutions $$$

Since 1976, we at Mitchell Technical Sales have been dedicated to delivering excellence in quality cleanroom design, manufacturing, installation, certification, and maintenance. Our journey has been marked by innovation and expertise, ensuring that every project we undertake reflects our commitment to precision and cutting-edge solutions.

Mitchell Technical Sales $$$

Welcome to Cleanrooms USA, where we pride ourselves on delivering unparalleled expertise and innovative solutions in the realm of cleanroom technology. At Cleanrooms USA, we are dedicated to providing cutting-edge cleanroom environments that meet the stringent requirements of industries ranging from pharmaceuticals and biotechnology to electronics and aerospace.

Cleanrooms USA $$$
Get Your Company Listed
placeholder image Abtech, Inc. Clean Rooms International, Inc. Cleanrooms by United Atmos-Tech Industries Clean Air Technology, Inc. Modular Cleanrooms, Inc. Bayside Interiors BASX Solutions Mitchell Technical Sales Cleanrooms USA

The term clean room refers to a specially engineered and designed environment that has been cleansed of dust, dirt, microbes, and other contaminating particles. To be classified as a clean room, specific standards and conditions must be met, as stipulated by the United States Governments Federal Standards 209 (FED-STD-209E) and the International Organizations for Standardization (ISO).

The description of the standards of the ISO and Federal Standard 209 clearly and concisely defines the conditions a clean room must meet to be classified as a clean room. Adhering to the qualifications is the initial step in the process, followed by determining what classification a clean room meets.

Although the ISO and Federal Standard 209 intend to define the class of a clean room, each organization approaches the issue using a different classification method. For the ISO, clean rooms are classified using a numbering system, beginning with ISO 1 for the strictest compliance with clean room standards and continuing to ISO 9. Federal Standard 209 was published by the Institute of Environmental Sciences and Technology (IEST) in 1963 and was updated in 1992. Its numbering system begins with class 1 (ISO 3) as the most restricted and continues to class 100000.

The designing of a clean room begins with determining what classification is necessary. The primary factor in deciding is based on the size and quantity of particulate matter allowed in the air, which is essential for defining a clean room's classification.

ISO 14644-1 Cleanroom Standards
Maximum Particles/m³
Classification≥0.1µm≥0.2µm≥0.3µm≥0.5µm≥1µm≥5µmFED STD 209E
ISO 1102.371.020.350.0830.0029
ISO 210023.710.23.50.830.029
ISO 31,000237102358.30.029Class 1
ISO 410,0002,3701,020352832.9Class 10
ISO 5100,00023,70010,2003,52083229Class 100
ISO 61.0 x 10^6237,000102,00035,2008,320293Class 1,000
ISO 71.0 x 10^72.37 x 10^61,020,000352,00083,2002,930Class 10,000
ISO 81.0 x 10^82.37 x 10^71.02 x 10^73,520,000832,00029,300Class 100,000
ISO 91.0 x 10^92.37 x 10^81.02 x 10^835,200,0008,320,000293,000Room Air

Federal Standard 209 Air Classification System

The particles measured in a clean room are far smaller and more minute than the types of pollen, dust, and dirt that can be seen with the naked eye. Clean room particles are measured in micrometers, or one-thousandth of a millimeter, and referred to as a micron (µ).

Definition of a Micron

The US FED STD 209E standard system rates clean rooms based on the number of 0.5-micron particulates present per cubic foot in an enclosure. The particulate volume number decides the classification number assigned to a clean room. For example, Class 1 clean rooms have no more than one 0.5 micron particle per cubic foot. To achieve this low level of contamination, Class 1 clean room designs must have high-efficiency particulate air (HEPA) filters working in concert with other decontamination equipment.

As the class numbers increase, so does the acceptable level of particulate presence. For example, Class 10000 clean rooms contain no more than 10,000 0.5 micron sized particles per cubic foot. By comparison, the normal unfiltered air we breathe would be Class 1,000,000.

The lower the class number, the more likely the clean room has hard walls with a complex filtration and personnel decontamination system. Higher-class clean rooms, such as modular and portable ones, can be less permanent. They provide basic protection and can be moved easily and disassembled without difficulty.

The design and structure of a clean room dictate the kinds of operations for which it can be used. This is also represented through the garments workers are permitted to wear. For example, class 1 clean rooms require employees to wear a bunny suit covering them from head to toe with a mask and synthetic gloves. In a Class 10000 clean rooms, workers can wear their own clothes but must have their hair, feet, hands, and faces covered. Additionally, class 1 clean rooms are small and limited to allow for better air supply control, while class 10000 clean rooms can be very large like classrooms.

Elements of a Clean Room

Three basic principles are considered when planning and designing a clean room. The first of those considerations is the quality of the air, which is the determining factor regarding a clean room's classification. Next is the size and number of surfaces of a clean room and the type of equipment used. The final component, and the one that supplies the most contamination, is the number of workers.

Air Filtration

The key element when defining a clean room is its quality of air. Controlling fresh air flow is simple since it involves passing a stream of air through a high-efficiency particulate air (HEPA) filtration system. The challenge is how to maintain that system without the clean room being contaminated. This aspect of the design process is the key to a high-performance clean room.

Each classification of clean rooms measures the air change rate (ACR), determined by how quickly the air in a clean room is replaced by clean filtered air. The ACR is the number of air changes per hour, with lower-class clean rooms having an ACR measured in changes per second. Additionally, the speed of the change is measured in feet per minute.

HEPA Air Filtration

Knowing what atmosphere the industry requires is necessary when planning a clean room. Particle size and the number of particles in a cubic foot or meter must be carefully assessed regarding the product being tested or fabricated.

Clean Room Structure

Once the air filtration and cleanliness have been established, the next step is to design the walls, ceiling, floor, vents, and entryways for a clean room. Wall panels are made of resilient materials that are tightly secured. Ceilings have a metal hanging grid where tiles are securely placed. Finally, vents can be located on the floor or walls for easy airflow.

Cleanroom Construction


The final element in clean room planning is the people who will work in it. Air control, clean walls and ceilings, and the seal of a clean room are static and seldom change. However, the personnel is constantly changing and carries a wide range of contaminants and bacteria, which must be monitored and controlled through body coverings, masks, and decontamination doors and pass thrus. The classification of a clean room determines the type of hygiene clean room staff must follow.

Selecting the Right Clean Room Design Company

For the most productive outcome when purchasing a clean room design from a clean room design company, it is important to compare several businesses using our directory of clean room design companies. Each clean room design company has a business profile page that highlights their areas of expertise and capabilities, along with a contact form to directly communicate with them for more information or to request a quote. Review each clean room design business using our patented website previewer to get a better understanding of what each company specializes in. Then, use our simple RFQ form to contact multiple clean room design businesses with the same form.

Cleanroom Design Informational Video


Clean Rooms Power Pages



A cleanroom is a specially designed enclosed space where airborne particulates have been limited or removed by a highly sophisticated filtration system. They are used by industries that require a highly controlled and monitored environment for the production...

Portable Cleanrooms

Portable Cleanrooms

A portable cleanroom is a compact system that requires little space, provides mobility, is cost effective, and offers exceptional clean and filtered airflow to create an uncontaminated and sanitized environment. They are a modular designed room where...

Softwall Cleanrooms

Softwall Cleanrooms

A softwall cleanroom is a confined controlled space with a metal frame, clear panel walls, an entrance, high efficiency particulate air (HEPA) filters, and exceptional lighting that is designed to provide a contaminant and particulate matter free workspace...

Cleanroom Products

Cleanroom Products

Cleanroom products are specially designed and engineered to prevent the contamination and pollution of highly sensitive cleanroom environments. For a cleanroom to receive its level of classification, it is required to be cleaned, constructed, and sanitized to meet a list of qualifying conditions and standards....

Modular Clean Rooms

Modular Clean Rooms

A modular clean room is a prefabricated, controlled environment that is constructed to limit the presence of sub-micron particulates. These specially designed rooms are assembled using prefabricated panels inserted into a frame. They are purchased as a kit to be assembled or can be constructed by a technician...

Types of Cleanrooms

Types of Cleanrooms

A cleanroom is a specially designed and configured room that has been constructed to eliminate dust particulates and atmospheric contaminants. They are commonly used for scientific research, pharmaceutical production, and other industries that produce products that can be damaged by unsanitary or polluted conditions...

Environmental Chambers

Environmental Chambers

An environmental chamber is an enclosure used to test the effects of a variety of conditions on a product, component, part, or assembly. These highly technical pieces of equipment are capable of simulating the types of conditions a product may face while in use...

Modular Buildings

Modular Buildings

Modular buildings are buildings made up of standardized sections, called "modules," manufactured in a controlled environment of a factory away from the building's future location. The common factory-made, standard modules include walls...

Altitude Chambers

Altitude Chambers

An altitude chamber is a test chamber that is designed to simulate the altitude, vacuum, and temperature of environmental conditions at heights that match the flight patterns of all forms of aircraft, from commercial to military...

HEPA Air Filters

HEPA Air Filters

A HEPA filter is a high efficiency pleated air filter capable of capturing extremely small particulate matter down to particles that are the size of a micron (µ), or a micrometer, which is 1/1000th of a meter...

Test Chamber

Test Chamber

A test chamber is a managed and controlled environment used to test the endurance, stability, and practicality of equipment, products, and chemicals. They are a controlled enclosure that mimics the effects of environmental conditions that a product may encounter during its usage...

Prefabricated Buildings

Prefabricated Buildings

Prefabricated buildings, or prefabs, are buildings with components (walls, roof, and floor) that are manufactured in a factory or manufacturing plant. These components can be fully or partially assembled in a factory which is then transferred at the construction site...

Test and Measurement Equipment

Featured Industries