Operating a clean room
01 February 2018

Operating a clean room

Cleanrooms are defined as a room or suite of rooms, in which the concentration of airborne particles is maintained within established parameters and where other factors are controlled to within specified limits. The most effective way of maintaining the air quality in a cleanroom is to operate and maintain it correctly.

This involves:

  • minimising the amount of potential contamination that escapes from your manufacturing operations
  • strictly controlling access to the cleanroom to only trained personnel and limiting the number, as even trained operators are the most significant source of cleanroom contamination
  • regularly cleaning your facility to strictly controlled procedures
  • regular maintenance of the facility and equipment
  • regular monitoring of the air filters and air flows and frequent recertification of the cleanroom.

Air change rate

This refers to the number of times the air is changed within a cleanroom. It is simply calculated by taking the total volume of air introduced into the cleanroom over an hour and dividing it by the volume of the room. It is expressed as air changes per hour (ACH) and for cleanrooms, this is normally between 20 and 40 air changes per hour.

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