According
to the American Lung Association
a significant segment of the U.S.
population suffers from allergies
caused by bioaerosols; mold spores,
bacteria, and viruses are examples
of bioaerosols.
Your
heating and airconditioning ventilation
ducts and filters breed and circulate
germs, viruses and allergy-causing
mold spores.
Filters
and other air cleaning devices
are not totally effective in removing
bioaerosols and in many cases
worsen the problem.