Air purification and
ventilation in buildings
Air purifiers and air cleaners especially
Hepa air cleaners purifiers
improve indoor air quality and help relieve allergy and asthma symptoms.
We test many different hepa, multigas, ultraviolet, voc, and
electrostatic air purifiers and compare them below.
HEPA filters cannot be cleaned and are usually replaced every year. This
can amount to a considerable expenditure annually. Some of the
disadvantages of HEPA filters are that they are extremely fragile and
are easily damaged. Estimates of operating costs for HEPA filters have
been placed at $100 to $300 annually for most installations. Although
HEPA filters are very effective when it comes to filtering dust
particles, they cannot filter out most biological contaminants such as
virus, bacteria etc, because these are extremely small in size.
Filtration usually refers to the removal of contaminating substances
from the ambient atmospheric air, while air purification refers to the
removal of harmful substances and biological material as well
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