GE GTD18GSSJWW Installation Instructions Manual page 13

DO NOT bend
or collapse
ducting. Use
elbows if turns
are necessary.
EXHAUST LENGTH
Using exhaust longer than specified length will:
Increase the drying times and the energy cost.
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 on the chart.
Internal elbows added for side or bottom vent
conversions must be included in the total elbow
count.
Any elbow greater than 45° should be treated as
a 90° elbow.
Two 45° elbows will be treated like one 90° elbow.
For every additional 90° elbow, reduce the
allowable vent system length by 10 feet.
When calculating the total vent system length,
you must add all the straight portions and
elbows of the system (including the transition
duct).
Installation Instructions
DO cut duct as short
as possible and install
straight into wall.
DO NOT use
excessive
exhaust
length. Cut
duct as short
as possible.
DO NOT
crush duct
against the
wall .
RECOMMENDED MAXIMUM LENGTH
Recommended
4" DIA.
4"
No. of 90° Rigid
Elbows Metal
0 120 Feet
1 100 Feet
2 85 Feet
3 70 Feet
4 60 Feet
5 55 Feet
13
DO use elbows when
turns are necessary.
Elbows
EXHAUST LENGTH
Exhaust Hood Types
Use only for short
run installations
4" DIA.
4" DIA.
Rigid
Metal
90 Feet
75 Feet
65 Feet
55 Feet
45 Feet
35 Feet
DO NOT
set dryer
on duct .
2-1/2"