Misleading HEPA Claims:
We receive the occasional phone call from customers looking for a cyclone HEPA filter.  We have been in this business since 1972 and to the best of our knowledge, there is no  such thing as a “Cleanable HEPA” here in the United States.  Here in the  U.S., a filter must meet MIL Std 282 to be called a HEPA…that’s 99.97%  efficient at 0.3 microns.  European HEPA standards vary widely from H10,  which is only 85% efficient at 0.3 micron, all the way up to H14, which is  99.995%.  Before you risk your health, or waste a lot of money on a filter,  be sure to do your research.  A quick Google search for
“European hepa efficiency”, or “en 1822” will turn up valuable  information.  Again, in the United States, a filter must be 99.97%  efficient at 0.3 microns to be rated HEPA.