If work processes are to be carried out in a clean environment, the question sometimes arises as to whether a cleanroom is sufficient or whether the construction of a cleanroom is necessary. In the following article, you will find out in which cases the respective cleanliness level – cleanroom or cleanroom – is necessary.

What is the difference between a cleanroom and a cleanroom?

One of the main differences between a cleanroom and a cleanroom is the maximum permissible particle size in the respective area. In a cleanroom, the maximum permissible particle size in the air is 5 μm. In a cleanroom, on the other hand, the particles on the components may be up to 600 μm in size. The unit “μm” stands for micrometer. The measurement of particles also differs. In the cleanroom, the air is analyzed using particle counters. Components are washed in the cleanroom. The particles are then extracted from the washing solution and the particle size is determined using a microscope.

Another difference between a cleanroom and a cleanroom is the parameters that are measured. In a cleanroom, only the particles are usually measured, whereas in a cleanroom, the temperature, humidity and overpressure are also measured. In addition to particles, germs are also measured in the cleanroom.

And finally, there is a difference in terms of ventilation and filter technology. Only medium-grade technology is installed in the clean room. A much lower air exchange rate (from ten air changes per hour) is achieved there than in the cleanroom, where the ventilation technology installed is much more complex and the air exchange rate is much higher at up to 30 air changes per hour. However, the better technology in the cleanroom leads to higher costs.

Moreover, the structure of a cleanroom is similar to that of a cleanroom, although the cleanroom is usually equipped with stainless steel furniture, whereas this is not absolutely necessary in the cleanroom.

Dust control mats

Standardization of the cleanliness area

In addition to the standardization of class systems for cleanrooms, there is also a standardization of cleanliness areas in general, which applies to both cleanrooms and clean areas. The standardization of cleanliness areas can be found in the VDA 19.2 guideline, which divides cleanliness areas into four different cleanliness levels :

  • Cleanliness level 0 (SaS0): non-regulated area
  • Cleanliness level 1 (SaS1): Clean zone
  • Cleanliness level 2 (SaS2): Clean room
  • Cleanliness level 3 (SaS3): Clean room (according to EN ISO 14644)

In the non-regulated area (cleanliness level 0, SaS0), separable work processes are carried out in the same area as other work processes. This area is not set up to ensure cleanliness. This area is also not labeled.

The clean zone (cleanliness level 1, SaS1), on the other hand, is an area separated by floor markings in which cleanliness-oriented work processes are carried out. Instead of floor markings, the area can also be separated by partitions or strip curtains. People who wish to enter the clean zone must comply with the cleanliness regulations. Materials brought into the clean zone must also comply with the cleanliness regulations. Apart from air conditioning, no clean air technology is used in the clean zone. The clean zone is marked as such.

The clean room (cleanliness level 2, SaS2) is structurally separated from other rooms and permanently installed. Persons who wish to enter the clean room and materials that are brought into it must comply with the cleanliness guidelines. Apart from air conditioning, no clean air technology is used in the cleanroom. The cleanroom is marked as such.

The cleanroom (cleanliness level 3, SaS3) is also a fixed structural installation that is separated from other areas. The work processes that take place in a cleanroom are subject to strict cleanliness guidelines. For example, people and materials can only enter the cleanroom via airlocks. Clean air technology is also used in the cleanroom to filter particles from the air. The cleanroom is labeled as such.

When is a cleanroom recommended?

If it is not absolutely necessary to prevent the particle size of 5 μm being exceeded in the air, a cleanroom is recommended, as the investment costs and operating costs for ventilation, filters and monitoring are lower in a cleanroom than in a cleanroom. In the cleanroom, the maximum permissible particle size on the components is 600 μm.

The maximum permissible particle size for the respective application depends on the particle size at which interference is caused. The particle type and particle quantity can also play a role here.

abovo helps you with the room concept

The experts at abovo will advise you free of charge and without obligation as to whether a cleanroom is sufficient for your applications or whether the construction of a cleanroom is necessary. Simply send us an e-mail or give us a call.