As stated before, clean rooms are classified by how clean the air is, according to the number of particles and size of particles per volume of air. Some classifications do not require certain particle sizes to be tested because the respective concentrations are too low or too high to be tested, but they should not be zero.
For ISO 7, particles smaller than 0. Air cleanliness is achieved by passing the air through HEPA filters using flow principles such as laminar flow. The more often the air passes through the HEPA filters, the fewer particles are left in the room air. The volume of air filtered in one hour divided by the volume of the room gives the number of air changes per hour.
The above-suggested air changes per hour are only a design rule of thumb. They should be computed by an HVAC clean room expert, as many aspects must be taken into consideration, such as the size of the room, the number of people in the room, the equipment in the room, the processes involved, the heat gain, etc.
Contact our experts to discuss your project. Please note that this information is only provided for educational purposes. The definitions in this article are oversimplified in order to assist with understanding. This article will not help you decide which clean room classification you must reach.
If help is needed in this respect, seek the advice of an expert in your industry pharmaceutical, medical devices, sterile compounding, electronics, etc. We can Design-Build-Install and Commission your cleanroom or we can partner with other professionals that your are currently working with!
By continuing to use the site you agree to our privacy policy. Clean Room Classifications Clean rooms are classified according to the cleanliness level of the air inside the controlled environment. ISO Cleanroom Standards and layouts Depending on the class of clean room system you would like to reach, it is important to allow for enough square footage. Cleanroom classification and air changes per hour Air cleanliness is achieved by passing the air through HEPA filters using flow principles such as laminar flow.
I agree. ISO 4. Class ISO 8 Cleanroom. Request for Quote Contact Us. ISO class 8 modular Hardwall and Softwall cleanrooms provide significant particle protection for your project needs. They require numerous air changes and allow a limited number of maximum particle concentration limits per room.
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