Installation guide
Installation
Instructions
INSTALLATION
INSTRUCTIONS
FOR
EXTERNAL
EXHAUST
DUCTING
NOTE:
If
you
need
to
install
ducts,
note
that the
total
Maximum
duct
length:
duct
length
of
Sia"
x
10
(8.2
x
25.4
cm)
rectangular
or
For
satisfactory
air
movement,
the
total
duct
length
of
5"
(12.7
cm)diameter/
6”
(15.2
cm)
diameter
round
duct
3%4"
x
10”
(8.2
x
25.4
cm)
rectangular
or
5"
(12.7
cm)
should
not
exceed
120
equivalent
feet
(36.5
m).
diameter/6
"(15.2
cm)
diameter
round
duct
should
not
Outside
ventilation
requires
an
EXTERNAL
EXHAUST
exceed
120
equivalent
feet
(36.5
m).
DUCT.Read
the
following
carefully.
NOTE:
It
is
important
that
venting
be
installed
using
Elbows,
transitions,
wall
and
roof
caps,
the
most
direct
route
and
with
as
few
elbows
as
possible.
etc.,
present
additional
resistance
to
airflow
and
are
This
ensures
clear
venting
of
exhaust
and
helps
prevent
equivalent
to
a
section
of
straight
duct
which
is
longer
blockages.
Also,
make
sure
dampers
swing
freely
and
than
their
actual
physical
size.
When
calculating
the
total
nothing
is
blocking
the
ducts.
duct
length,
add
the
equivalent
lengths
of
all
transitions
.
and
adaptors
plus
the
length
of
all
straight
duct
sections.
Exhaust
connection:
The
chart
below
shows
you
how
to
calculate
total
The
exhaust
adaptor
has
been
designed
to
mate
with
equivalent
ductwork
length
using
the
approximate
feet
a
standard
3%"
x
10"
(8.2
x
25.4
cm)
rectangular
duct.
of
equivalent
length
of
some
typical
ducts.
If
a
round
duct
is
required,
a
rectangular-to-round
transition
adaptor
must
be
used.
A
5"
(12.7cm)/
6"
(15.2cm)
diameter
duct
is
acceptable
to
use.
EQUIVALENT
NUMBER
EQUIVALENT
DUCT
PIECES
LENGTH
X
USED
=
LENGTH
Rectangular-to-Round
5
Ft.
(1.5
m)
X
( }
=
Ft.
orm
Transition
Adaptor*
ry
Wall
Cap
AO
Ft.
(12.2
m)
X
( }
=
Ft.
orm
OD
90°
Elbow
10
Ft.
(3
m)
X
( }
=
Ft.
orm
Q
45°
Elbow
5
Ft.
(1.5
m)
X
( }
=
Ft.
orm
EZ
90°
Elbow
25
Ft.
(7.6
m)
xX
(
)
=
Ft.
orm
FA
45°
Elbow
5
Ft.
(1.5
m)
x
(
)
=
Ft.
orm
eS
Roof
Cap
24
Ft.
(7.3
m)
xX
( )
=
Ft.
orm
Straight
Duct
6"
(15.2
cm)
1
Ft.
(0.3
m)
X
( }
=
Ft.
orm
Round
or
34/4"
x
10°
(8.2
x
25.4
cm
Rectangular)
Total
Ductwork
=
Ft.orm
*
IMPORTANT:
If
a
rectangular-to-round
transition
Equivalent
lengths
of
duct
pieces
are
based
on
actual
tests
>
adaptor
is
used,
the
bottom
corners
of
the
damper
and
reflect
requirements
for
good
venting
performance
with
will
have
to
be
cut
to
fit,
using
the
tin
snips,
in
order
any
vent
hood.
to
allow
free
movement
of
the
damper.
EN-10