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HEPA Filter Leakage Testing, Airflow Distribution Testing and Flow Rate Verification

HEPA Filter Leakage Testing, Airflow Distribution Testing and Flow Rate Verification
HEPA (high efficiency particulate air filters) filters and HEPA filter integrity are critical to air filtration systems in industries including pharmaceutical, semiconductor, food, and nuclear. HEPA filters are most effective when used at their rated airflow resistance and face velocity, and various standards have been implemented for certification and in-situ qualification testing of HEPA filters.

Airflow Measurement for Air Cleaners, Purifiers and Sanitizers

Airflow Measurement for Air Cleaners, Purifiers and Sanitizers
The covid-19 pandemic has generated an increased interest in airflow and cleaning the air.  Air cleaners, also referred to as air purifiers or sanitizers, use differing technologies including HEPA filtration, activated carbon filtration, ultraviolet (UV) germicidal irradiation, or multiple technologies such as filtration with UV disinfection.  The ASHRAE Position Document on Filtration and Air Cleaning provides information on these and other technologies. 

Air Velocity Monitoring for Critical Containment

Air Velocity Monitoring for Critical Containment
Engineering controls are used to protect laboratory workers. Examples include exposure control devices (ECDs) such as chemical fume hoods and biosafety cabinets (BSCs), which are ventilated to contain harmful toxins and odors, and safeguard against fume releases into the room. These critical containment cabinets differ in design, and airflow requirements vary as well, according to the application.