Categorized | clean room

Designing a Clean Room

The design of a clean room is that much more complex than the design of a conventional system as it is more demanding in terms of standards and precaution measures. When talking a about a clean room design, it`s not only the humidity and temperature control that have to be taken into consideration, there are also many other sources of possible contamination such as particulates, electrostatic discharge, airflow, gas contaminants, that must be controlled in a way that ensures that all highly set cleanliness requirements are met at all times.

Following are some of the key aspects of clean room design that must be met in any successful project of the kind.

  1. Filtration.
    One of the most important functions of a modern clean room is to control and minimize particle contamination. The filters themselves will play the leading role it this task and special attention must be paid when doing this choice. Generally speaking there are two kinds of filters: high efficiency particulate air (HEPA) filters and ultra-low penetration air (ULPA) filters. The first ones are also known as absolute filters and are mostly used when an extreme cleanliness is mandatory.
  2. Airflow.
    A clean room requires the distribution of greater amounts of air in order to meet the demands of cleanliness and purity; therefor management of the airflow patterns is of extreme importance when designing these systems. By controlling the direction the air will go, you are also controlling the way particles move around the room. Based on the patterns that the air takes, there are two main design types: unidirectional and non-unidirectional flow design.
  3. Room Pressure.

There are basically two major principals that have to be respected in the design of a clean room when air pressure is the subject of discussion:

  • The room itself has to be with a static pressure that is higher than the atmospheric one in order to prevent penetration by wind.
  • There should be a positive pressure maintained between different rooms in the facility which will ensure that the air flows only from the cleanest to the least clean place and not the other way around.

Even though clean room design is an industry standard present for quite some time now, there are still many aspects of it that need to be improved, one that is most pressing is increasing the efficiency of the whole concept. What makes for a solid clean room design, apart from providing a quality solution with specific cleanliness requirements is also having the right approach of designing the clean room so it fits in the existing facilities or the new ones being built, in a way that will ensure seamless flow and efficiency on the long run. This will only be possible if there is a close communication between the clean room designers and the overall engineering teams working on the facility.

Leave a Reply