HEPA panel air filter
Purolator's ULTRA-CELL HEPA filter products are
high efficiency aluminum separator style filters, except for the
ULTRA-CELL "V" Pleat.
They are manufactured for environments requiring
95% minimum efficiency on .3 micron particles,
99.97% efficiency on .3 micron, or 99.99% efficiency on
.3 micron (scan tested to assure no leak shall exceed 0.01% of the upstream challenge).