Fungi, bacteria and
dust accumulation in the
ventilation ducts of
large
office buildings is
the main reason
for the deterioration
of the same.
Such buildings can
now be nursed
back to good health
thanks to a
treatment offered by
Prime Clean, a
Swedish company, and
the Royal
Technical University
in Stockholm.
To clean the ducts,
rotating brushes
and compressed air
are used.
The cleaning nozzle
makes
about 15,000 to
20,000 revolutions
per minute, thus
loosening the dirt.
When the nozzle is
pulled back, the
compressed air blows
out the dirt
from the ducts,
leaving behind a
clean ventilation
system.
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