Cleanroom HVAC

terminal hepa filter box with h14 filter installed in a cleanroom ceiling hvac air supply system

Terminal HEPA Filter Boxes Explained: Types, Applications and Selection Guide

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Introduction Terminal HEPA filter boxes are one of the final components in a cleanroom ventilation system. Installed at the end of the air distribution ductwork, they house the final HEPA filter before conditioned air enters the controlled environment. Unlike an Air Handling Unit (AHU), which conditions and distributes large volumes of air, or a Fan

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Cleanroom air changes per hour calculation showing supply airflow, room volume and HEPA filtrationcalculation

How to Calculate Air Changes per Hour (ACH) in a Cleanroom

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Introduction Air Changes per Hour, commonly abbreviated as ACH, is widely used in cleanroom and controlled-environment design. It expresses the total supply airflow delivered to a room in one hour as a multiple of the room’s internal volume. ACH can help engineers estimate the airflow required for contaminant dilution, particle removal, temperature control, humidity control

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