410 IAC 32-1-39
410 IAC 32-1-39 "High efficiency particle air" or "HEPA" defined
Cite as Ind. Admin. Code tit. 410, r. 32-1-39
Sec. 39. "High efficiency particle air" or "HEPA" means a filter capable of filtering out particles of three-tenths (0.3) micron or greater
from a body of air at ninety-nine and ninety-seven hundredths percent (99.97%) efficiency or greater.