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Airflow Visualization

According to the ISO 14644-3 Annex B7 International Standard, airflows in all classified environments of any ISO class should be visually verified every 24 months. Among the listed methods, the generation of tracers that clearly visualize speed and direction of the airflows, is suggested. The test is carried out in the areas of interest by taking pictures of the airflows made visible by the fog during “at rest” conditions (with no personnel present and no equipment in use). The purpose of this type of test is to verify and certify that the airflow devised and installed to protect the critical areas is working efficiently.