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Installation
Instructions
NOTE:
If wm
need
to install
ducts,
note
that
the
total
duct
length
of 3¼"
x ] O" rectangular
or 6" diameter
round
duct
should
not exceed
140
equivalent
feet.
Outside
ventilation
requires
a HOOD
EXHAUST
DUCT.
Read
the
following
carefully.
NOTE:
It is important
that
venting
be installed
using
the
most
direct
route
and
with
as few
elbows
as possible.
This
ensm'es
clear
venting
of exhaust
and
helps
prevent
blockages.
Also,
make
sure
dmnpers
swing
freely
and
nothing
is blocking
the
ducts.
Exhaust
connection:
The
hood
exhaust
has
been
designed
to mate
with
a standard
3Vt" x 10" rectangular
duct.
If a round
duct
is required,
a rectangula_to-rotmd
transition
adaptor
inust
be
used.
Do
not
use
less
than
a 6" diameter
duct.
Maximum
duct length:
For
satisfiwtorv
air movement,
the
total
duct
length
of
3¼"
x ] 0" rectangular
or 6" diameter
round
duct
should
not
exceed
140
equivalent
feet,
Elbows, transitions,
wall and roof caps,
etc.,
present
additional
resistance
to airflow
and
are
equiwdent
to a section
of straight
duct
which
is longer
than
their
actual
physical
size.
When
calculating
the
total
duct
length,
add
the
equiwdent
lengths
of all transitions
and
adaptors
plus
the
length
of all straight
duct
sections.
The
chart
below
shows
w)u
how
to calculate
total
equivalent
ductwork
length
using
the
approximate
feet
of equiwdent
length
of some
typical
ducts.
EQUIVALENT
NUMBER
EQUIVALENT
DUCT
PIECES
LENGTH
x
USED
=
LENGTH
Rectangular-to-Round
5 Ft.
x
(
)
=
Ft.
Transition Adaptor*
Wall Cap
40 Ft.
x
(
)
=
Ft.
()_
90 ° Elbow
10 Ft.
x
(
)
=
Ft.
45° Elbow
5 Ft.
x
(
)
=
Ft.
90 ° Elbow
25 Ft.
x
(
)
=
Ft.
45° Elbow
5 Ft.
x
(
)
=
Ft.
RoofCap
24 Ft.
x
(
}
=
Ft.
Straight Duct 6" Round or
1 Ft.
x
(
)
=
Ft.
3W' x 10" Rectangular
Total Ductwork
=
Ft.
* IMPORTANT:
If' a r_ctangulal_to-round
transition
Equival< nl 1_ngths of duct piec< s are based on _tClll_al I {%ts
adaptor is used, the bottom comers of th( damp( 1
and refl( ct requir( m( his tk)r good v( riling performanc(
with
xdll hax_ to b< Clll to fit, using Ih(t lill snips, in ordel
any vent hood.
to allm_ free lllOVelllelll of Ihe
dalllpel.
5
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