Better Air Filter Than HEPA? It's Called ULPA
HEPA removes 99.97% of particles 0.3 micrometers or more.
ULPA removes 99.999% of particles 0.12 micrometers or greater.
ULPA is correspondingly much more expensive.
Here are some HEPA filters sold on Amazon.com:
Here is an ULPA unit sold on Amazon.com:
Fauquier ENT
Dr. Christopher Chang is a private practice otolaryngology, head & neck surgeon specializing in the treatment of problems related to the ear, nose, and throat. Located in Warrenton, VA about 45 minutes west of Washington DC, he also provides inhalant allergy testing/treatment, hearing tests, and dispenses hearing aids.

1 comment:
How long has ULPA have been certifying filters? I have used HEPA certified filters and they are really good filters. They meet most of the industrial requirements I need but maybe I can try ULPA in the future
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