Cleanrooms and equipment

Which device, arrayed on the ceiling, integrates a filter and fan to deliver clean air?

  1. AFFU (fan filter unit)
  2. BEFEM
  3. COHT
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Answer: A. FFU (fan filter unit)

An FFU is a unit integrating a blower fan with a HEPA/ULPA filter; many are arrayed on a cleanroom ceiling to blow clean air downward. Airflow can be adjusted unit by unit and they adapt easily to layout changes, so they are widely used.

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