Table 4.18.
Relationship between efficiency and composite proportion of glass fiber inside HEPA filter
| Efficiency with 0.3 μm DOP particles (%) | Proportion of glass fibers in filter paper (%) |
|---|---|
| >99.995 | >90 |
| >99.97 | >60 |
| 99 | ~45 |
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.