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MENUClass 100 Clean room
In the modern metric ISO system, this translates to 3,520 particles per cubic meter.Achieving Class 100 status means maintaining fewer than 100 particles (≥0.5 µm) per cubic foot of air.
But here is the catch that many generic guides miss: You cannot achieve this by simply scrubbing the air. You must change the air aggressively. This requires a massive volume of air movement—often 300 to 600 times every hour. This distinction is the core of effective Class 100 CleanRoom Design.
A Class 100 CleanRoom (or ISO 5) is the unforgiving territory of high-precision manufacturing. Here, a single particle 0.5 microns wide—invisible to the naked eye—is a boulder capable of destroying a microchip or contaminating a sterile injectable.
Cleanroom Class Comparison: The Translation Table
Below is the comparison data we use when training new site managers. Notice the exponential jump in Air Changes Per Hour (ACH) required when moving from ISO 7 to a Class 100 CleanRoom.
| FED STD 209E Class | ISO 14644-1 Class | Max Particles per m³ (≥0.5 µm) | Max Particles per ft³ (≥0.5 µm) | Typical ACH Range |
|---|---|---|---|---|
| Class 10,000 | ISO 7 | 352,000 | 10,000 | 60-90 |
| Class 1,000 | ISO 6 | 35,200 | 1,000 | 90-180 |
| Class 100 | ISO 5 | 3,520 | 100 | 240-600+ |
| Class 10 | ISO 4 | 352 | 10 | 500-750+ |
The Physics of Clean: Unidirectional (Laminar) Flow Design
- Elimination of Turbulence: Unlike swirling air which picks up dust from the floor and deposits it onto workbenches, laminar flow suppresses lateral movement.
- Immediate Particle Removal: With a constant velocity of 0.45 m/s, any particle generated by a worker is immediately pushed straight down to the floor return, ensuring it never touches the product.
- The "Piston" Effect: This creates a continuous wash of clean air that acts as a physical barrier against contaminants.
- Coverage Requirement: To achieve this effect for ISO 5 standards, Deiiang™ typically specifies 60% to 100% ceiling filter coverage.
The Non-Negotiable Technical Specs (Key Requirements)
When we at Deiiang™ draft a scope of work for a client, these are the hard metrics. If a contractor offers you a Class 100 CleanRoom without guaranteeing these numbers, run the other way.| Specification | Target Range / Value | Importance & Notes from Deiiang™ |
|---|---|---|
| Air Changes Per Hour (ACH) | Target 240 to 600 ACH. | For high-heat load rooms (like semiconductor bake ovens), we lean towards 500+ ACH to manage thermals as well as particles. This is a core principle in Deiiang™ designs. |
| Filter Efficiency | ULPA (99.999% @ 0.12µm) | Standard HEPA (99.99% @ 0.3µm) is often not enough for modern nanotech. We increasingly specify ULPA filters for our Class 100 designs. |
| Airflow Velocity | 0.35 - 0.45 m/s (70-90 fpm) | This is the "sweet spot." Too slow, and particles settle. Too fast, and you create turbulence that stirs up dust. Calibrated by Product Designer: Jason.peng. |
| Positive Pressure | +15 Pascals minimum | The ISO 5 room must "leak" air out into the corridor. If the pressure drops, dirty air from the hall rushes in. |
| Humidity Control | 45% RH ±5% (Typical) | Often overlooked but critical. In electronic manufacturing, low humidity causes Electrostatic Discharge (ESD)—a chip killer. We specify precise control. |
Air Changes Per Hour (ACH)
Target: 240 to 600 ACH.Deiiang™ Note: For high-heat load rooms (like semiconductor bake ovens), we lean towards 500+ ACH to manage thermals as well as particles.Filter Efficiency
Target: ULPA (99.999% @ 0.12µm)Deiiang™ Note: Standard HEPA is often not enough for modern nanotech. We increasingly specify ULPA filters.Airflow Velocity
Target: 0.35 - 0.45 m/s (70-90 fpm)Deiiang™ Note: This is the "sweet spot." Calibrated by Product Designer: Jason.peng.Positive Pressure
Target: +15 Pascals minimumDeiiang™ Note: The ISO 5 room must "leak" air out into the corridor to prevent dirty air ingress.Humidity Control
Target: 45% RH ±5% (Typical)Deiiang™ Note: Critical to prevent Electrostatic Discharge (ESD)—a chip killer in electronics.Class 100 CleanRoom Industry Applications
From our project history at Deiiang™, we see the demand for Class 100 CleanRoom Requirements spiking in four specific areas. This isn't just about cleanliness; it's about yield rates and regulatory compliance.
Solving a High-Humidity ISO 5 Challenge
The Theory is easy. The Reality is hard. Here is a recent example of how we applied Class 100 CleanRoom Standards in a challenging environment.
Project Overview: Opto-Electronics Fabrication Plant (Suzhou)
Client Problem: A manufacturer of smartphone camera lenses was experiencing "haze" defects on their lens coatings. Their existing room claimed to be Class 100, but yield was dropping. The facility was located in a high-humidity zone, and condensation was a major threat.
The Deiiang™ Solution:
- Diagnosis: Our audit revealed the old system had "dead zones" where air velocity dropped to 0.15 m/s, allowing moisture and particles to settle on the lenses.
- The Retrofit: We tore out the partial filter ceiling and installed a 95% coverage Fan Filter Unit (FFU) grid. This ensured a true "piston" of air.
- Humidity Control: We integrated a dedicated desiccant wheel dehumidifier into the MAU (Make-up Air Unit) to aggressively strip moisture before it entered the recirculation loop, stabilizing RH at 40% ±3%.
- Result: Post-installation validation showed a particle count of < 10 particles (0.5µm) per ft³. Yield rates improved by 22% in the first month. A testament to Deiiang™ engineering.
Essential Equipment & Construction by Deiiang™
You can't build a Class 100 CleanRoom with drywall and standard AC. The materials must be non-shedding, anti-static, and seamless. Here is the hardware we rely on:
Fan Filter Units (FFUs) with EC Motors
This is the heart of the room. We use FFUs with Electronically Commutated (EC) motors. Why? They allow us to dial in the speed of each individual fan via software. If one corner runs hot, we speed up the fans there without disrupting the whole room. A standard set by Product Designer: Jason.peng.
Anti-Static Panel Walls
Standard epoxy paint isn't enough. We use modular sandwich panels with anti-static coatings. Dust loves static electricity; by grounding the walls and the raised floor, we prevent particles from sticking to surfaces. This is a Deiiang™ hallmark.
Air Showers & Pass-Throughs
Air Shower: A mandatory decontamination airlock for personnel. High-velocity HEPA air jets (25-30 m/s) remove particles from garments. 30-second cycle minimum. Pass-Through (Pass Box): Interlocked chambers for material transfer. Eliminates the need to open the main room door, preserving pressure differentials.
Monitoring & Control System
Continuous particle counters (likely multiple), pressure sensors, and temp/RH probes feed into a Building Management System (BMS) or dedicated cleanroom controller. Alarms for any parameter out of spec are non-negotiable for GMP and semiconductor operations.
Full FFU Ceiling
Perforated Floor
Deiiang™ Core Zone
FAQ
What is the difference between clean room 100 and 1000?
The primary difference between a Class 100 cleanroom (ISO Class 5) and a Class 1000 cleanroom (ISO Class 6) lies in the allowable concentration of airborne particles. A Class 100 cleanroom permits no more than 100 particles per cubic foot of air for particles ≥0.5 microns, translating to 3,520 particles per cubic meter, whereas a Class 1000 cleanroom allows up to 1,000 particles per cubic foot, or 35,200 particles per cubic meter, for the same particle size. This means the air in a Class 100 cleanroom is ten times cleaner than in a Class 1000 cleanroom. Consequently, Class 100 cleanrooms require more stringent air filtration systems, higher air change rates, and stricter operational protocols compared to Class 1000 cleanrooms, making them suitable for more contamination-sensitive applications.
What are the requirements for a Class 100 000 clean room?
A Class 100,000 cleanroom, also known as ISO Class 8, requires maintaining a controlled environment where the concentration of airborne particles is kept within specific limits. Specifically, it allows no more than 100,000 particles per cubic foot of air for particles ≥0.5 microns, which equates to 3,520,000 particles per cubic meter. To achieve this, the cleanroom must incorporate effective air filtration systems, such as HEPA filters, and maintain a moderate air change rate, typically around 10-25 air changes per hour. The construction materials should be smooth and easily cleanable to minimize particle generation. Personnel must follow basic gowning procedures, including wearing lab coats, hair covers, and shoe covers, to reduce contamination. Regular cleaning and maintenance protocols are essential to sustain the cleanroom's integrity, ensuring it meets the required cleanliness standards for applications such as general manufacturing, electronics assembly, and quality inspection areas.
What is a class a cleanroom?
A Class A cleanroom, as defined by the European Union GMP standards, is a high-level clean environment essential for critical processes like aseptic filling and sterile product manufacturing. Equivalent to an ISO Class 5 cleanroom, it permits no more than 3,520 particles per cubic meter for particles ≥0.5 microns. Maintaining such cleanliness requires advanced HEPA filtration, high air change rates, and strict construction standards using smooth, non-shedding materials. Personnel must wear sterile full-body suits, gloves, masks, and shoe covers, following rigorous gowning procedures. Additionally, continuous environmental monitoring and stringent cleaning protocols are mandatory to ensure compliance, making Class A cleanrooms crucial for producing sterile pharmaceuticals and other sensitive products.
How much air change for class 100 cleanroom?
A Class 100 cleanroom, equivalent to ISO Class 5, requires a high number of air changes per hour to maintain its stringent cleanliness standards, typically ranging from 240 to 480 air changes per hour. This high air exchange rate is achieved through advanced HVAC systems equipped with HEPA filters, which effectively remove airborne particles. The continuous influx of filtered air helps to dilute and remove contaminants, ensuring that the concentration of particles remains within the specified limit of no more than 100 particles per cubic foot for particles ≥0.5 microns. This rigorous air change rate is essential for maintaining the ultra-clean environment necessary for sensitive applications such as semiconductor manufacturing, biotechnology, and pharmaceutical production.
An Overview of ISO 5 Cleanroom
An ISO 5 cleanroom, also known as a Class 100 cleanroom, is a highly controlled environment that allows no more than 3,520 particles per cubic meter for particles ≥0.5 microns. It requires advanced HEPA filtration systems and high air change rates, typically between 240 to 480 air changes per hour, to maintain its stringent cleanliness standards. Construction materials must be smooth, non-shedding, and easy to clean. Personnel must adhere to strict gowning protocols, including wearing full-body suits, gloves, masks, and shoe covers. Frequent environmental monitoring and rigorous cleaning procedures are essential to ensure compliance, making ISO 5 cleanrooms critical for industries needing ultra-clean conditions, such as semiconductor manufacturing, biotechnology, and pharmaceuticals.
Clean Room Classifications & ISO Standards
Cleanroom classifications and ISO standards define the levels of cleanliness required for controlled environments, primarily focusing on the concentration of airborne particles. The ISO 14644-1 standard categorizes cleanrooms from ISO Class 1 to ISO Class 9, with ISO Class 1 being the cleanest. Each class specifies the maximum allowable particle count per cubic meter at various particle sizes. For example, an ISO Class 5 cleanroom (Class 100) allows up to 3,520 particles per cubic meter for particles ≥0.5 microns. These standards ensure that cleanrooms meet the necessary contamination control for various industries, including pharmaceuticals, biotechnology, and electronics, by detailing requirements for air filtration, air change rates, construction materials, and operational protocols.
what is a class 100 clean room ？
A Class 100 cleanroom, also known as an ISO Class 5 cleanroom, is a controlled environment that limits airborne particles to no more than 100 particles per cubic foot of air for particles ≥0.5 microns, or 3,520 particles per cubic meter. Maintaining this level of cleanliness requires advanced HEPA filtration systems, high air change rates (typically 240 to 480 air changes per hour), and strict cleanliness protocols. Construction materials must be smooth, non-shedding, and easy to clean. Personnel must follow stringent gowning procedures, including wearing full-body suits, gloves, masks, and shoe covers. These cleanrooms are essential for industries where even minimal contamination can compromise product integrity, such as semiconductor manufacturing, biotechnology, and pharmaceuticals.
what is class 100 cleanroom ？
A Class 100 cleanroom, or ISO Class 5 cleanroom, is a highly controlled environment that restricts airborne particles to no more than 100 particles per cubic foot of air for particles ≥0.5 microns. It requires advanced HEPA filtration, high air change rates (240 to 480 per hour), and strict cleanliness protocols. Construction materials must be smooth and non-shedding, and personnel must follow rigorous gowning procedures, including full-body suits and masks. These cleanrooms are vital for industries like semiconductor manufacturing, biotechnology, and pharmaceuticals, where minimal contamination is critical.
what is a class 100 000clean room？
A Class 100,000 cleanroom, or ISO Class 8 cleanroom, limits airborne particles to no more than 100,000 particles per cubic foot of air for particles ≥0.5 microns, equivalent to 3,520,000 particles per cubic meter. Maintaining this environment requires effective air filtration systems, such as HEPA filters, and moderate air change rates, typically 10-25 air changes per hour. Construction materials should be smooth and easy to clean, and personnel must wear lab coats, hair covers, and shoe covers. These cleanrooms support less contamination-sensitive applications, including general manufacturing, electronics assembly, and quality inspection areas.
how to build a class 100clean room？
Building a Class 100 cleanroom (ISO Class 5) involves several key steps: installing advanced HEPA filtration systems to ensure high air quality and achieving 240 to 480 air changes per hour; using non-shedding, smooth, and cleanable construction materials; implementing stringent entry protocols, including airlocks and gowning areas where personnel don full-body suits, gloves, masks, and shoe covers; and establishing rigorous cleaning and maintenance schedules. Additionally, continuous environmental monitoring is essential to maintain the required particle levels, ensuring the cleanroom meets the standards necessary for sensitive industries like semiconductor manufacturing and pharmaceuticals.
what does class 100 000clean room mean？
A Class 100,000 cleanroom, or ISO Class 8, is a controlled environment that limits airborne particles to no more than 100,000 particles per cubic foot for particles ≥0.5 microns (3,520,000 particles per cubic meter). It requires effective air filtration, typically with HEPA filters, and moderate air change rates of 10-25 per hour. The room must be constructed with smooth, easy-to-clean materials, and personnel must follow basic gowning protocols, such as wearing lab coats, hair covers, and shoe covers. These cleanrooms are used for less contamination-sensitive tasks like general manufacturing and electronics assembly.
what does class 100 clean room mean？
A Class 100 cleanroom, or ISO Class 5, is a highly controlled environment that limits airborne particles to no more than 100 particles per cubic foot for particles ≥0.5 microns (3,520 particles per cubic meter). It requires advanced HEPA filtration systems and high air change rates, typically 240 to 480 per hour. The room is constructed with smooth, non-shedding materials, and stringent gowning protocols are enforced, including wearing full-body suits, gloves, masks, and shoe covers. These cleanrooms are essential for industries where minimal contamination is critical, such as semiconductor manufacturing, biotechnology, and pharmaceuticals.
what is meant by class 100clean room？
A Class 100 cleanroom, also known as an ISO Class 5 cleanroom, is an environment that limits airborne particles to no more than 100 particles per cubic foot for particles ≥0.5 microns (3,520 particles per cubic meter). It requires advanced HEPA filtration and high air change rates, typically 240 to 480 per hour, to maintain air purity. The room is constructed with smooth, non-shedding materials, and personnel must follow strict gowning protocols, including wearing full-body suits, gloves, masks, and shoe covers. These cleanrooms are essential for industries like semiconductor manufacturing, biotechnology, and pharmaceuticals, where minimal contamination is critical.
