Operating Instructions
Vented Dryer
T 1405
To prevent accidents
and machine damage,
read these instructions
before
UV
Installation or use.
M.-Nr. 05 313 361
IMPORTANT SAFETY INSTRUCTIONS
Do not repair or replace any part of
the appliance or attempt any
servicing unless specifically
recommended in these operating
instructions. Repairs to electrical
appliances should only be performed
by qualified personnel. Incorrectly
repaired machines may pose a
considerable risk to the user.
,WARNING - To reduce the risk of
fire, electric shock, or injury to
persons when using your appliance,
follow basic precautions, including
the following:
Read all instructions before using
the appliance.
Do not dry articles that have been
previously cleaned, washed,
soaked or spotted with gasoline,
dry-cleaning solvents or other
flammable or explosive substances.
They may give off vapors that could
ignite or explode.
Do not use heat to dry articles
containing foam rubber or similarly
textured rubber-like materials, or items
containing hair spray, nail polish
remover or similar substances.
Clean the lint filter before or after
each load.
Do not allow children to play on or
in the appliance. Close supervision
is necessary when the appliance is
used near children. Always close the
door after use to prevent child hazards.
Keep the area around the air intake
(toekick) and adjacent surrounding
areas free from lint, dust and dirt.
The interior of the machine and
exhaust duct should be cleaned
periodically by qualified personnel.
Before this appliance is removed
from service or discarded, remove
the door to the drying compartment.
Do not place items exposed to oils
in your dryer. Items contaminated
with oils may contribute to a chemical
reaction that could cause the laundry to
catch fire.
Do not reach into the dryer if the
drum is moving.
Do not install or store this
appliance where it will be exposed
to the weather.
This dryer is intended for
residential use only!
Do not tamper
with the controls.
3
IMPORTANT SAFETY INSTRUCTIONS
GROUNDING INSTRUCTIONS
This appliance must be grounded.
In the event of malfunction or
breakdown, grounding will reduce the
risk of electric shock by providing a
path of least resistance for electric
current.
This appliance is equipped with a cord
having an equipment-grounding
conductor and a grounding plug. The
plug must be plugged into an
appropriate outlet that is properly
installed and grounded in accordance
with all local codes and ordinances.
WARNING – Improper connection
of the equipment grounding
conductor can result in a risk of electric
shock. Contact a qualified electrician if
you are in doubt as to whether the
appliance is properly grounded.
Do not modify the plug provided
with the appliance: if it will not fit
the outlet, have a proper outlet installed
by a qualified electrician.
SAVE THESE INSTRUCTIONS
4
Control panel
a e- "PROGRAMS" buttons
g "Start/Stop" button T
For selecting a drying program.
Starts and stops a program.
Interrupts a program when pressed.
b "OPTIONS" buttons
Flashes during program selection
and lights once the program starts.
For selecting a drying option.
c "DRYNESS" button
h "Door" button
For selecting the dryness level of
finished laundry.
Opens the door when the program
has finished. If the dryer is on, the
drum interior will light when the door
is opened. If the door is left open, the
light will go off after a few minutes to
save energy.
d "STATUS" display
Shows the current cycle of the drying
program.
i "On/Off" button
e "Buzzer" button
Turns power to the machine on and
off.
When selected, a buzzer will sound
at the end of a program.
f "FAULT" indicators
An illuminated indicator will alert you
if the child lock has been activated
or if a fault occurred.
5
Before loading the dryer
Program recommendations
The dryer must be correctly installed
and connected before the first use.
Please refer to the "Installation
Instructions".
Normal
– Cottons and Permanent Press blends
Wrinkle-free
^ Before using for the first time clean
the drum with a cloth.
– Permanent Press:
select the Hand Iron dryness and
reduce the load size for best drying
results
Before drying, check fabric care
labels for special drying instructions.
– Delicate fabrics, such as polyester:
select the Gentle option to reduce
creasing
q Dry with normal temperature
r Dry with low temperature
(select "Gentle" option)
s Do not dry in a tumble dryer
– Pure linen and down filled items
– Do not overload the drum!
Woolens
Overloading the dryer will result in
poor drying results and wrinkling.
– Wool and wool blends
– Knitted fabrics and flannel tend to
shrink when washed and dried for
the first time. Do not overdry these
fabrics.
Smooth
– Linen
– Permanent Press (cottons, blends
and synthetics)
– To prevent discoloration, do not dry
new, dark-colored fabrics with
light-colored items.
Sturdy
– Durable Cottons and Permanent
Press
– Close zippers and tie up fabric belts
and apron ties to prevent tangles
and damage to clothing.
Fluff / 20 min / 30 min
– Do not dry items that may melt or
ignite in the dryer, such as plastics,
rubber or sneakers.
– All fabric types
6
Using the dryer
1. Turn on the dryer and load
the laundry
2. Select a program
^ Press the "On/Off" button to turn on
the dryer.
^ Press the "Door" button to open the
door.
^ Load the laundry loosely into the
drum.
^ Make sure the lint filters are in place.
^ Close the door with a firm swing - do
not push it shut.
For best results use liquid fabric
softener when washing laundry.
Fabric softener sheet may clog the
filters and cause the dryer to
overheat.
^ Press the e or - button until the
desired program indicator lights.
To prevent fabric damage, check
that laundry will not be caught in the
closed door.
7
Using the dryer
Program
When to use
Note
Normal Available drying options: Turbo, Full load, Gentle, Anti-crease
Extra Dry
Multi-layer, mixed loads of sturdy cottons, The "Extra Dry" program should not be
e.g. jeans, towels.
selected for jersey materials.
Items may shrink.
More Dry
Normal
Uniform loads of cottons,
e.g. sheets, underwear, socks.
-
Knitted items that may shrink,
If items are still damp, dry again using
e.g. jersey material or lightweight cottons. "More Dry".
Less Dry
Hand Iron
Cotton or linen fabrics to be left damp for
ironing.
-
If fabrics are too damp, dry again using
"Less Dry".
Rotary Iron
Cotton or linen fabrics which will be ironed To prevent moisture loss, roll up the
with a rotary iron.
laundry until ready to iron.
Wrinkle-free Available drying options: Turbo, Gentle, Anti-crease
More Dry
Synthetic permanent press items
e.g. pants and shirts.
-
Normal
Permanent press and blended fabrics,
e.g. cotton/synthetic.
Less Dry
Permanent press and blended fabrics
requiring an ironed finish.
Reduce load size for fabrics that wrinkle
easily.
Special Programs Available drying options: Anti-crease only available in Fluff,
Sturdy
Woolens
Delicate items which allow machine
drying.
Remove items immediately at the end of
the program, while still slightly damp.
Allow items to air dry.
Smooth
Program for reducing creasing of cotton,
linen or permanent press fabrics made of
cotton, blends or synthetics.
-
Sturdy
Fluff
Mixed loads of cotton and permanent
press items.
-
Individual items to be freshened and
fluffed with cool air.
Reduce load size.
TIMED CYCLES Available drying options: Gentle, Anti-crease
20 min
For individual items or very small loads,
e.g. beach towels, swimsuits.
-
30 min
8
Using the dryer
3. Select a drying option
(if needed)
OPTIONS
Turbo
Fast drying for sturdy fabrics with
increased temperature and a reduced
program length.
Full load
Select this option for efficient drying of
a standard size load.
Gentle
For drying delicate fabrics at a lower
temperature with an extended program
time.
^ A drying option can be selected or
deselected with each press of the
button.
Anti-crease
Prevents wrinkles if laundry is not
removed immediately after the end of a
program. The drum periodically rotates
for about 1 hour.
9
Using the dryer
4. Select the dryness level
5. Select the buzzer (if desired)
The dryness level can be selected in
the "Normal" and "Wrinkle-free"
^ Press the "Buzzer" button to have a
tone beep at the end of the program.
programs. (The dryness level of the
other programs cannot be adjusted.)
Indicator light:
on = buzzer selected
off = buzzer not selected
Adjusting the buzzer volume:
– the dryer must be on
– the door closed
– a program selected
– if the "Buzzer" indicator is lit, press
the "Buzzer" button so its indicator
light goes out.
^ Press and hold the "Buzzer" button
until its indicator lights and you hear
the desired volume and tone.
^ Press the selection button until the
desired indicator illuminates.
In the "Wrinkle-free" program, only
"More Dry", "Normal" and "Less Dry" can
be selected.
10
Using the dryer
6. Start the program
7. At the end of a program
The "Anti-crease/End" indicator will light
at the end of a program and the buzzer
will sound if it was selected.
If a fault occurred, a "FAULT" indicator
will light. See "Frequently asked
questions" for details.
^ Press the "Start/Stop T" button.
Once the program starts, the current
cycle of the program will be indicated
in the "STATUS" display.
^ Press the "Door" button.
^ Open the door.
^ Remove the laundry.
^ Check that the drum is empty.
^ Clean the lint filter after each use
(see "Dryer care").
^ Close the door.
^ Press the "On/Off" button to turn off
the dryer.
11
Using the dryer
Canceling or changing a
program
Adding or removing laundry
during a program
^ Press and release the "Start/Stop T"
button to stop the drying program.
^ Turn off the dryer using the "On/Off"
button.
To continue drying:
^ Press the "Door" button.
^ Select the new program by pressing
^ Open the door.
the e or - button.
,CAUTION - Do not touch the rear
of the drum while adding or
removing items! There is a danger of
burns due to high temperatures in
the drum.
^ Select any desired options.
^ Select a dryness level (available in
the "Normal" and "Wrinkle-free"
programs).
^ Press and release the "Start/Stop T"
button to start the new program.
^ Add or remove items.
^ Close the door.
^ Turn the dryer back on with the
"On/Off" button.
12
Child lock
Child lock
To deactivate the child lock
When activated, the child lock prevents Repeat steps 1. to 5.
the dryer from being operated by
locking the control panel functions.
The "Child lock" indicator will go out.
The control panel is now unlocked.
The dryer can be turned on but not
started. The "Child lock" indicator will
flash.
6. Turn off the dryer using the "On/Off"
button.
The door can be opened.
To activate the child lock
1. Make sure the dryer is turned off and
the door is closed.
2. Press and hold the "Anti-crease" and
"DRYNESS" buttons at the same time,
hold until step 5.
3. Turn on the dryer with the "On/Off"
button.
4. Press the "OPTIONS" button 3 times.
5. Release the "Anti-crease" and
"DRYNESS" buttons.
The "Child lock" indicator will flash and
the dryer is now locked.
6. Turn off the dryer using the "On/Off"
button.
13
Dryer care
Cleaning the lint filter
,A clogged filter is a fire hazard!
The lint filter must be cleaned after
every program.
^ Wipe the lint off the filter with your
hand (do not use any sharp objects!)
^ Any lint remaining in the hollow part
of the door can be removed through
the gap at the bottom with a dust
brush or vacuum.
^ Open the door and remove the lint
filter by gently lifting it upwards.
^ Return the lint filter and close the
door.
The lint filter can be rinsed with hot
water if necessary. The filter must be
dried thoroughly before being returned
to the dryer door.
14
Dryer care
Cleaning the exterior and the
control panel
,To reduce the risk of electric
shock, disconnect the dryer from the
power supply by shutting off the
power main, tripping the circuit
breaker or unplugging the power
cord before performing
maintenance.
Never use abrasive cleaners,
scouring pads, steel wool or caustic
(oven) cleaners on the dryer. They
will damage the surface.
^ The exterior and the control panel
can be cleaned with warm water and
liquid dish soap applied with a soft
sponge.
^ Wipe dry.
Cleaning the drum
^ The stainless steel surfaces of the
drum can be cleaned using a
non-abrasive stainless steel cleaner.
^ Wipe clean with a soft cloth.
15
Dryer care
Changing the light bulb
^ Replace the light bulb with a
temperature proof bulb, available
from Miele.
,To reduce the risk of electric
shock, disconnect the dryer from the
power supply by shutting off the
power main, tripping the circuit
breaker or unplugging the power
cord before performing
The light bulb must not exceed the
maximum wattage listed on the data
plate.
^ Flip up the light bulb cover and press
it firmly until it clicks into place.
maintenance.
^ Open the door.
,Make sure the bulb cover is
securely closed to prevent a short
circuit or penetrating moisture.
The bulb cover is located along the
upper rim of the drum opening.
^ Restore power.
^ Slide a screwdriver with a wide head
underneath the side edge of the bulb
cover and twist (see illustration).
^ Flip down the bulb cover.
16
Frequently asked questions
What if the dryer will not run?
Possible fault
Fix
The "Start/Stop T" button was not Make sure the dryer is on. Press the "Start/
pressed. Stop T" button to begin the drying program.
The circuit breaker tripped or the Make sure the dryer is plugged in or reset
dryer is unplugged.
the circuit breaker.
The door is not closed.
How do I prevent static cling?
Close the door properly.
Add fabric softener to laundry when washing or select the "Less Dry" setting on
the dryer.
What if the drum light does not come on?
Possible fault
Fix
The bulb may be bad or burned
out.
See "Changing the light bulb."
What if the "Child Lock" indicator flashes after turning the dryer on and a
program cannot be started?
Possible fault
Fix
The child lock is activated.
Deactivate the child lock. See "Child Lock."
What if the program stops, the "Anti-crease / End" indicator lights and the
buzzer sounds?
Possible fault
Fix
The drum is empty.
Load laundry into the dryer. The dryer will not
operate when the drum is empty. Single
items should be dried with "Sturdy" or a
timed program and dry items in the "Fluff"
program.
What if the "Filter/Vent" fault indicator is lit?
Possible fault
Fix
The lint filter is clogged.
Clean the lint filters. See "Dryer care".
The exhaust hose or the
connection is clogged with lint.
Remove lint and check the exhaust system
for blockages.
The air supply in the room is
insufficient.
Open a window or door to increase airflow.
17
Frequently asked questions
What if the "Filter/Vent" indicator lights after cleaning the exhaust system?
Possible fault
Fix
The dryer is not operating efficiently
because the duct hose is too long.
Check the exhaust length and diameter
(see "How to calculate the effective
duct length"). A long exhaust hose will
increase program times and energy
consumption.
If the exhaust hose cannot be
shortened, the indicator can be turned
off by a service technician.
What if the program runs too long or stops?
Possible fault
Fix
The airflow is insufficient in the area of Open a window or door to increase
the dryer.
airflow.
The lint filters are clogged.
Clean the lint filters (see "Dryer care").
The laundry was not spun sufficiently in Select a higher spin speed in the wash
the washer.
program.
The dryer is overloaded.
Reduce the load size.
Metal zippers interfere with the dryer’s Select a timed program to avoid
moisture sensors. overdrying.
An airflow gap of 3/8" (10 mm) must be This gap must not be blocked by a
provided between the machine and the toekick or thick piled carpets for
floor.
sufficient airflow.
What if the laundry is not dry enough?
Possible fault
The load contained too many dissimilar items (size and fabric.)
What if water has collected around the drum opening?
Possible fault
This is condensed moisture from the laundry.
18
Quick Guide
Remove this guide for easy reference
Please read all
instructions, especially
the "Important Safety Instructions",
before using the dryer.
Quick Guide
1.Turn on the dryer and load the
laundry
2. Select a program
^ Press the "On/Off" button to turn on
the dryer.
^ Press the "Door" button to open the
door.
^ Press the e or - button until the
desired program indicator lights.
^ Load the laundry into the drum. Make
sure that there is enough space in the
drum for clothes to tumble freely.
3. Select a drying option (if needed)
To prevent fabric damage, check
that laundry will not be caught in the
closed door.
^ A drying option can be selected or
deselected with each press of the
button.
^ Close the door with a firm swing - do
not push it shut.
Quick Guide
4. Select the dryness level
5. Select the buzzer (if desired)
6. Start the program
^ Press the "Start/Stop T" button.
7. At the end of a program
The "Anti-crease / End" indicator will
light.
^ Press "Door" and remove the laundry.
^ Clean the lint filter.
^ Press the selection button until the
desired indicator illuminates.
^ Press the "On/Off" button to turn off
the dryer.
Quick Guide
Program
When to use
Note
Normal Available drying options: Turbo, Full load, Gentle, Anti-crease
Extra Dry
For laundry to be folded and shelved
immediately, e.g. jeans, towels.
The "Extra Dry" program should not be
selected for jersey materials.
Items may shrink.
More Dry
Normal
For uniform loads, e.g. sheets,
underwear, socks.
-
For knitted items that may shrink, e.g. If items are still damp, dry again using
jersey material or lightweight cottons.
"More Dry".
Less Dry
Hand Iron
For items to be left damp for ironing.
-
If fabrics are too damp, dry again using
"Less Dry".
Rotary Iron
For items to be ironed with a rotary
iron.
To prevent moisture loss, roll up the
laundry until ready to iron.
Wrinkle-free Available drying options: Turbo, Gentle, Anti-crease
More Dry
For items that do not require ironing,
e.g. pants and shirts.
-
Normal
For items to be hung after drying.
For items which require ironing.
Less Dry
Reduce load size for fabrics that wrinkle
easily.
Special Programs Available drying options: Anti-crease only available in Fluff,
Sturdy
Woolens
Delicate items which allow machine
drying.
Take items out immediately after the end
of the program while still slightly damp.
Allow items to air dry.
Smooth
Program for reducing creasing in
delicate items.
-
Sturdy
Fluff
For mixed loads of durable items.
-
Individual items to be freshened and
fluffed with cool air.
Reduce load size.
TIMED CYCLES Available drying options: Gentle, Anti-crease
20 min
Individual items or very small loads,
e.g. beach towels, swimsuits.
-
30 min
Individual items or very small loads,
e.g. beach towels, swimsuits.
Technical Service
In the event of a fault you cannot fix
yourself, please contact the Miele
Technical Service Department
PC Update
The indicator on the control panel
marked PC allows a technician to
update the dryer to make use of new
technology.
U
V
1-800-999-1360
For example, if new programs or fabrics
are developed, a service technician will
be able to modify the existing program
cycles accordingly.
1-800-565-6435
When contacting Technical Service,
please quote the model and serial
number of your appliance. They can be
found on the data plate located below
the drum opening.
19
Installation Instructions
IMPORTANT SAFETY INSTRUCTIONS
Installation, repair and
maintenance work should be
performed by a Miele authorized
This dryer must be vented
outdoors to reduce the risk of fire.
Be sure to observe local building
service technician. Work by unqualified codes.
persons could be dangerous and could
Use flexible or rigid metal pipe for
void the warranty.
venting. Non-metallic flexible hose
should not be used, it is a potential fire
hazard.
Before installation, disconnect the
tumble dryer from the electrical
supply by shutting off the power main,
unplugging the power cord or tripping
the circuit breaker. Do not restore
The dryer exhaust must not be
connected to a chimney, ducting
which ventilates rooms with fireplaces,
a combustion appliance vent flue, a
wall, ceiling or concealed space of a
building.
power until the installation is complete.
GROUNDING INSTRUCTIONS
This appliance must be grounded.
In the event of malfunction or
If there is any doubt concerning
installation, contact Miele’s
Technical Service Department.
breakdown, grounding will reduce the
risk of electric shock by providing a
path of least resistance for electric
current. This appliance is equipped
with a cord having an equipment
grounding conductor and a grounding
plug. The plug must be plugged into an
appropriate outlet that is properly
installed and grounded in accordance
with all local codes and ordinances.
U
V
1-800-999-1360
1-800-565-6435
WARNING – Improper connection
of the equipment grounding
conductor can result in a risk of electric
shock. Check with a qualified
electrician or service representative or
personnel if you are in doubt as to
whether the appliance is properly
grounded.
Do not modify the plug provided
with the appliance! If it will not fit
the outlet, have a proper outlet installed
by a qualified electrician.
22
Caring for the environment
Disposal of the packing
materials
Disposal of an appliance
Old appliances may contain materials
that can be recycled. Please contact
your local recycling authority about the
possibility of recycling these materials.
The cardboard box and packing
materials protect the appliance during
shipping. They have been designed to
be biodegradable and recyclable.
Ensure that a discarded dryer presents
no danger to children. While being
stored for disposal remove the door to
the drying compartment.
To prevent suffocation of children,
ensure that any plastic wrappings,
bags, etc. are disposed of safely and
kept out of the reach of children.
23
Washer / Dryer Stack
The tumble dryer can also be placed
Height of vent adapter in a stacked
on top of a Miele washing machine for a installation
stacked installation. An appropriate
Miele washer with a flat or angled
control panel
stacking kit is required. The stacking kit
is available from your Miele dealer or
the Miele Technical Service
Department.
,Installation of the stacking kit
must be performed by a Miele
authorized technician.
5’ 6 3/8" (168.6 cm)
Stacking kit with a pull out shelf
24
Electrical connection
The dryer comes with a 5 ft long, 12/4
AWG cord and a NEMA 14-30 P plug.
GROUNDING INSTRUCTIONS
This appliance must be grounded.
In the event of malfunction or
breakdown, grounding will reduce
the risk of electric shock by
providing a path of least resistance
for electric current. This appliance is
equipped with a cord having an
equipment grounding conductor and
a grounding plug. The plug must be
plugged into an appropriate outlet
that is properly installed and
It should be connected to a
120/208-240 V, 15 A, 60 Hz AC power
supply. A 3 pole-4 wire grounding
power outlet (NEMA type 14-30 R) is
necessary.
EASY INSTALLATION KIT
If you do not have a dedicated 15 Amp
line for this appliance, but you have the
standard, 120/208-240 V - 30 Amp,
60 Hz AC outlet, you can use the "Easy
Installation Kit", which allows you to use
that line to connect the dryer to power.
grounded in accordance with all
local codes and ordinances.
WARNING – Improper connection of
the equipment grounding conductor
can result in a risk of electric shock.
Check with a qualified electrician or
service representative or personnel
if you are in doubt as to whether the
appliance is properly grounded.
057B for on-site outlet NEMA 10-30 R
060B for on-site outlet NEMA 14-30 R
For more information on the "Easy
Installation Kit" or if you have questions
concerning the electrical connection,
please contact:
U
1-800-999-1360
Do not modify the plug provided with
the appliance! If it will not fit the
outlet, have a proper outlet installed
by a qualified electrician.
V
1-800-565-6435
25
Installation
a Exhaust connection:
The exhaust hose can be installed
either at the rear, left or right of the
dryer.
c Control panel
d Door
e Four height adjustable feet
b Power cord with plug
26
Installation
Leveling the dryer
Determining the position of the
exhaust connection
The exhaust connection can be left at
the rear of the dryer (factory standard)
or moved to the left or right side of the
dryer.
Changing the position of the exhaust
connection
^ Remove the exhaust connection
cover on the left or right side of the
dryer.
The dryer must be level to ensure safe
and proper operation. Minor
discrepancies do not however, have an
adverse effect on operation.
^ Turn the cover counterclockwise to
remove it.
^ Firmly press the cover into the rear
opening.
The machine can be leveled by turning
the legs clockwise or counterclockwise
as necessary.
27
Installation
Installation tips
An airflow gap of 3/8" (10 mm) must
be provided between the machine
and the floor. This airflow gap must
not be blocked by a toekick or thick
piled carpets.
Do not install the dryer next to a
refrigerator. The warm air exhausting
from the dryer can affect the
thermostat of the refrigerator,
causing it to run continuously.
28
Installation
Exhaust connection with a
flexible exhaust hose or rigid
pipe
Window connection
Using the connector supplied, an
exhaust hose (4" [100 mm]
diameter) can be installed.
Necessary materials:
– a wall or window duct
– an exhaust hose made of approved
non-flammable material
1 Window connection (installed in a
plexiglass pane)
2 Connector for the flexible exhaust hose
Wall connection with rigid pipe
^ Install the connector, 1, with the
exhaust hose or pipe, 2, to the dryer.
1 Wall pipe
2 Connector
3 Rigid pipe
29
Installation
Direct wall connection
Necessary materials:
– a wall pipe
Dryer side view
– flexible foam gasket
Dryer top view
1 Wall pipe
2 Flexible foam gasket
1 Wall pipe
2 Flexible foam gasket
^ Connect the flexible foam gasket, 2,
to the wall pipe connector, 1.
^ Push the dryer to the wall.
30
Installation
How to calculate the effective
duct length
Tips about the ductwork
– Check with your local building code
to determine the maximum allowable
duct length.
The overall duct length will determine
the duct diameter.
– Use flexible metal pipe or rigid metal
pipe for venting. Non-metallic flexible
hose should not be used since it is a
potential fire hazard.
^ Measure the actual duct length
needed to go from the dryer’s
exhaust connection to the vent outlet:
1. Establish the number of elbows or
bends necessary, noting the type of
bend, angle and radius involved
(see Table).
– For best drying results avoid extra
long ducting with too many bends,
angles or tight corners.
– The shorter the exhaust ductwork,
the more efficient the dryer will be.
Expelled air is slowed down in the
ducts due to friction against the inner
walls. The shorter and smoother the
inner walls are, the less friction will
be created.
2. Add the additional duct length (as
derived by using the values
specified in the table) to the actual
duct length to get the effective
length.
– An elbow or bend creates more
friction than a straight duct. An
additional duct length factor must be
added for each elbow or bend (see
Table). This factor expresses the
resistance of the bend in terms of a
straight length of duct.
Note:
Maximum effective duct lengths:
4" (100 mm) diameter
5" (125 mm) diameter
6" (150 mm) diameter
66 ft (20 m)
132 ft (40 m)
328 ft (100 m)
Effective duct lengths over 66 ft (20 m)
require a larger duct diameter.
The additional length factor is then
added to the existing duct to give the
effective duct length.
A larger duct diameter helps to
reduce friction. Therefore the duct
diameter and length should be
increased simultaneously.
Longer ducts may lead to slight
decreases in dryer efficiency if the
necessary duct diameter is not
employed.
31
Installation
Additional duct lengths (4" rigid pipe only)
Type
of
bend
RadiusAdditional
ft
cm
ft
cm
Flexible metal duct
– 3’ 3" (1 m) straight
– 45° angle
5’ 11"
4’ 11"
8’ 2"
180
150
250
10"
10"
25
25
– 90° angle
Smooth metal duct
– 3’ 3" (1 m) straight
– 45° angle
3’ 3"
1’ 11"
2’ 7"
100
60
80
10"
10"
25
25
– 90° angle
Elbow 90° sharp
7’ 6"
2’ 4"
230
70
Concertina bend
– 90° angle
8"
20
Wall vent or window vent
– with louvers
– with flap
12’ 5"
4’ 11"
380
150
Exhaust connection
– left or right side
3’ 3"
100
32
Installation
Example: Calculating the effective duct length and required internal
duct diameter
Rigid pipe
A
Duct length
ft
Duct length
m
12’ 5"
3.8 m
Wall duct with
louvered wall vent
B
2’ 7"
1’ 7"
2’ 7"
3’ 3"
22’ 5"
0.8 m
0.5 m
0.8 m
1.0 m
6.9 m
90° bend
C
20" (0.5 m) rigid pipe
90° bend
D
E
left vent opening
Total duct length
The total duct length is less than 33 feet (10 m), so a duct diameter of 4" (100 mm)
with adapter is sufficient.
33
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