Doesn't this defeat the whole purpose of purifying the air? By
vacuuming the HEPA filter, one is just spewing the particulates into
the air again, hopefully to be captured by the HEPA filter again
(except that you get the joy of breathing it while it is being
recaptured).
I live in a highrise apartment building, in a region with serious
winter weather. Vacuuming it filter outside is not an option. (This
doesn't even take into account the fact that the typical household
appliance is not meant to be operated outside).
Obviously, I must be missing something here. It will soon be time to
"clean" or replace the filter.