Air ducts are often full of
debris, dust, insects, mold, and particulate matter. I
just had my ducts cleaned for the third time since moving
into this house five and a half years ago.
Each of the duct cleaners had
slightly different equipment. Many have fungicides
that can be misted into the ducts, but because I am not sure
of the safety of the products used, I have not tried this. I
have, however, put a few drops of cinnamon oil on an aromatherapy
pad and put this between the grill over the return and filter. The
aroma is intense and pervasive so be really careful how much
||As you can see, the
truck is specially equipped with enormous vacuum cleaner
bags, hoses, and the power to suction out debris in the
||The hose is attached to the furnace
and sucked into the bags mounted on the truck.
||Air, using a compressor, is blown
from each register. The flexible tubing is fed
into the ducts and rotated so as to blow as much debris
as possible through the ducts to the furnace and into
the vacuum bags.
This is a straightforward job,
sometimes performed by one person and sometimes by two. It
takes a couple of hours and costs $200-300, depending on
the company, equipment used, and number of registers. If
there are a lot of particulates in the air, it may solve
many problems. I
believe it is essential to clean the ducts after any construction
or renovation work.
When I first had the ducts
cleaned, I had been aware of the smell of burning construction
materials (and the chemicals used on those materials.) The
person performing the work found pieces of drywall, wood,
sawdust, nails, and such in the ducts.
The second and third times,
we only found powder, lots of it. After each cleaning,
I felt the air quality had improved significantly.
3 October 2006
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See also, page on HVAC
Systems and Forced Air