Just called the ionizer machine distributor to get a replacement filter and ask abot HEPA certification.

The thing has been long discontinued. O'm SOL.

0-0

Word of caution: I am more sensitive to the ozone generated by our ionizer than I was to our cats. We went with a non-ionizing air cleaner. Not cheap, bot I don’t have that asthmatic reaction to it after sleeping in the same room with it.