A cleanroom project specifies a HEPA filter rated to remove at least 99.97% of particles at 0.3 micrometers. Which submittal matches that stated performance?
- AA filter labeled MERV 13 with no HEPA performance documentation.
- BA coarse prefilter without a particle-efficiency rating.
- CA screen rated only for insect exclusion.
- A HEPA filter documented at 99.97% efficiency at 0.3 micrometers.
Where to look it up
https://www.cdc.gov/infection-control/hcp/environmental-control/air.html
Why D is correct
Match the submittal to the specified particle size and efficiency. CDC describes this HEPA performance; the question does not assign a universal filter requirement to every cleanroom.