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HEPA filters are for particulates. They won't do much about gasses such as formaldehyde or radon.
by ams6110 9y ago
HEPA filters are for particulates. They won't do much about gasses such as formaldehyde or radon.
- Alex3917 9y agoMost air purifiers with HEPA filters also have plasma generators to reduce VOCs. Whether it's a good idea to leave them running when you're in the room probably depends on how much you trust them not to be generate appreciable amounts of ozone.