Look closely my friends and sure enough...the panty hose
serve as a lint collector for a clothes dryer. The good news is that, a
periodic visit to the garage will reveal when the "legs" are nearly
full and can be emptied. The bad news is
that dryers that vent to a garage add warm moisture that may lead to fungal
growth and combustible dryer lint that, even in small quantities may be
Clothes dryers should always be vented to the exterior
through rigid or metal flexible piping to a non-restricted (not screened)
exhaust and equipped with a back-draft damper.
Here is some information about safe dryer venting that I
distribute to my customers.
dryer ducting must be a minimum of 4" in diameter and shall not be reduced
in size. Clean, unobstructed,
frictionless ducts encourage air flow efficiency, quicken drying time, add
longevity to clothing life and reduce utility bills.
transition hose between the dryer and the wall outlet should be either the
aluminum metal flex or rigid aluminum duct (do not use foil or plastic vinyl as
they collect combustible lint and will burn when overheated).
joints shall be installed so that the male end of the duct points in the
direction of the airflow.
joints should be secured with metal (foil) tape: not duct tape. Do not use rivets or screws in the joints or
anywhere else as these will encourage lint accumulation.
vents shall always be to the exterior (not to attics, basements, chimneys or
garages) and must not be screened or obstructed.
vents shall not be installed within 12" of the ground or in areas where
snow will prevent a free air flow and proper exhaust. The vent hood must point
vents must be 25' in developed length or less without the addition of an
approved in-line dryer booster fan.
Deduct 5 feet for each 90 degree elbow and 2.5 feet for each 45 degree
elbow. These dryer vent lengths may vary by manufacturer.
crushed or severely bent dryer vents will limit air flow and should be
eliminated or minimized. (Consider the installation of an in-wall "Dryer
ducting accumulates combustible lint and should be inspected by a Certified
Dryer Exhaust Technician (CDET) as certified by the Chimney Safety Institute of
America (CSIA.org) periodically (at the time of a home purchase and perhaps
every three or four years thereafter). I recommend that you periodically examine
the dryer exhaust vent for cleanliness (lack of lint) and free air flow (when
the dryer is operating).
the dryer vent screen before or after each dryer use. If clothing is still damp
at the end of a typical drying cycle, or drying requires longer times than
normal, this may be a sign that the lint screen or the exhaust duct is blocked.
of vertical dryer vents is discouraged as these tend to accumulate dryer lint
and many dryers do not have fans forceful enough to elevate the warm air and
and underscored again, the use of the white vinyl flex pipe is all but
completely prohibited, both by building departments and appliance
manufacturers. Some municipalities allow or at least do not do not discourage
the foil (Mylar) covered flex pipe but almost all appliance manufacturers
insist on the use of the aluminum rigid or flexible piping (ducting).