One of the qualities people most
ask for in an air purifier, is quiet operation. A unit that can remove
particles, allergens, spores, gasses, chemicals and all matter of indoor air
pollution from a large space without making any noise is what most customers
who come to ClearFlite are looking for. It is a tall order to say the least!
Years of heavy television advertising by the Sharper Image company has firmly
planted the idea in the minds of the public that an air purifier can do a
remarkable job without making a sound, or moving much air! With the exception
of Blueair, which has done an exemplary job in designing the flow of air so
that it is as quiet as possible, most models of air purifier that actually
work, emit noise to some degree. An internal fan is typically the reason for
the noise, but it is also the reason that the air purifier works; dirty air is
pulled into the unit and clean air emerges.
HEPA air purifier models as well as the electrostatic and ionization units
that work effectively all have fans which emit sound. Typically the air
purifier will be fairly quiet on the lower speeds, make an audible blowing
noise on the mid-speeds, and be fairly loud on the highest speed. But it is on
the highest speed, where an air purifier has enough power to pull air from the
far reaches of the room. A silent air purifier with no fan is simply not able
to move much air. The air very close to the air purifier may be cleaned
effectively, but the idea that it will mysteriously pull air from clear across
a large room silently and without a fan is fantasy.
Although effective air purifier units do emit noise, there are variances which
make some models much more easy to live with than others. ClearFlite has found
that there are models from different manufacturers that make almost the same
amount of noise but the pitch is different. The higher the pitch, the more the
air purifier noise will have a whine in it, which can be irritating. The lower
the pitch, the more comfortable the sound.
Athough the air purifier brands which ClearFlite has chosen to carry do emit
sound, we have selected those with a lower pitch. The sound is just that of
the blowing of a fan. It is not as loud as a room air conditioner fitted in a
window, but there is a blowing sound. In most cases, the sound becomes
background noise which is not obtrusive at all. In the case of air purifier
units used in bedrooms, the sound often becomes white noise which covers other
sporadic sounds in the house thus allowing the owner to sleep better. Many
customers tell us they cannot sleep without an air purifier in the room, and
have to take one on vacation!
Blueair’s design, which is a combining of electrostatic and HEPA technology
where the flow of air is charged before it moves through the filter, makes the
airflow less constricted and thus quieter. Yet even on a Blueair air purifier,
there is still a strong blowing sound on the highest speed. Most manufacturers
are trying very hard to reduce the noise, but it is extremely challenging. An
air purifier that truly removes toxic elements from the air is most likely
going to make some noise.
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