2.
In certain buildings
with a lack of
correct ventilation,
the actual indoor
atmosphere may
be One hundred
times more
polluted than the
air outside!
3.
4.
5.
If you are shopping for an
air cleaner, then you ought
to first consider what kind
of contaminants you are
trying to get rid of. For
example, if you have
problems with tobacco
smoke, then you'll want to
make sure your air cleaner
is able to get rid of gases,
VOCs, along with other
gas.