Installation Instructions
26

EXHAUST SYSTEM CHECKLIST

HOOD OR WALL CAP
•Terminate in a manner to prevent back drafts
or entry of birds or other wildlife.
•Termination should present minimal resistance
to the exhaust airflow and should require little
or no maintenance to prevent clogging.
• Never install a screen in or over the exhaust
duct. This could cause lint buildup.
•Wall caps must be installed at least 12″above
ground level or any other obstruction with the
opening pointed down.
•If roof vents or louvered plenums are used, they
must be equivalent to a 4″dampened wall cap
in regard to resistance to airflow, prevention
of back drafts and maintenance required to
prevent clogging.
SEPARATION OF TURNS
For best performance, separate all turns
by at least 4 ft. of straight duct, including
the distance between the last turn and
the exhaust hood.
TURNS OTHER THAN 90º
•One turn of 45º or less may be ignored.
•Two 45º turns should be treated as one
90º turn.
•Each turn over 45º should be treated as
one 90º turn.
SEALING OF JOINTS
•All joints should be tight to avoid leaks.
The male end of each section of duct must
point away from the dryer.
•Do not assemble the ductwork with fasteners
that extend into the duct. They will serve as
a collection point for lint.
•Duct joints can be made air- and moisture-tight
by wrapping the overlapped joints with duct
tape.
•Horizontal runs should slope down toward
the outdoors 1/2″per foot.
INSULATION
Ductwork that runs through an unheated area
or is near air conditioning should be insulated
to reduce condensation and lint buildup.
EXHAUSTING THE DRYER (cont.)
WARNING – USE ONLY METAL
4″DUCT. DO NOT USE DUCT LONGER THAN
SPECIFIED IN THE EXHAUST LENGTH TABLE.
Using exhaust longer than specified length will:
•Increase the drying times and the energy cost.
•Reduce the dryer life.
•Accumulate lint, creating a potential
fire hazard.
The correct exhaust installation is YOUR
RESPONSIBILITY.
Problems due to incorrect installation
are not covered by the warranty.
The MAXIMUM ALLOWABLE length of
the exhaust system depends upon the type
of duct, number of turns, the type of exhaust
hood (wall cap) and all conditions noted below.
Both rigid and flexible metal duct are shown
in the table below.

EXHAUST LENGTH

RECOMMENDED MAXIMUM LENGTH
Exhaust Hood Types
Recommended Use only for short-
run installations
No. of 90º Rigid Flexible Rigid Flexible
Elbows Metal Metal Metal Metal
0 150 Feet 55 Feet 125 Feet 45 Feet
1 135 Feet 52 Feet 115 Feet 42 Feet
2 125 Feet 49 Feet 105 Feet 39 Feet
3 115 Feet 46 Feet 95 Feet 36 Feet
4 105 Feet 43 Feet 85 Feet 33 Feet
5 95 Feet 40 Feet 75 Feet 30 Feet
4
″
DIA
4
″21⁄2″
4
″
DIA 4
″
DIA
If using flexible metal duct, please refer to page 25.