vacuuming. Others, like

vacuuming. Others, like
ductwork, you put
under negative pressure
with a vacuum
collection unit and then
dislodge the
accumulated dirt and
debris with your air
washing and power
bushing tools.
This dirt and debris is
collected (via the
negative pressure or
suction from the
vacuum collection unit)
and blown (via air
washing tools) to the
vacuum collection unit.
Coils can be cleaned via
air washing, contact
vacuuming or with coil
cleaning solutions and
water.