GE Profile Advantium SCA2001KSS, Installation Instructions Manual

Page: 5 / 24

5
NOTE: If you need to install ducts, note that the total duct
length of 3 1 ⁄
4
″
x 10
″
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 ensures clear venting of exhaust and helps prevent
blockages.
Also, make sure dampers swing freely and
nothing is blocking the ducts.
Exhaust connection:
The hood exhaust has been designed to mate with
a standard 3
1 ⁄
4
″
x 10
″
rectangular duct.
If a round duct is required, a rectangular-to-round
transition adaptor must be used.
Do not use less than
a 6
″
diameter duct.
Maximum duct length:
For satisfactory air movement, the total duct length of
3
1 ⁄
4
″
x 10
″
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 equivalent
to a section of straight duct which is longer than their actual
physical size. When calculating the total duct length, add
the equivalent lengths of all transitions and adaptors plus
the length of all straight duct sections. The chart below
shows you how to calculate total equivalent ductwork length
using the approximate feet of equivalent 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.
Roof Cap 24 Ft. x ( ) = Ft.
Straight Duct 6
″
Round or 1 Ft. x ( ) = Ft.
3 1 ⁄
4
″
x 10
″
Rectangular
Total Ductwork = Ft.
Installation Instructions
* IMPORTANT: If a rectangular-to-round transition adaptor
is used, the bottom corners of the damper will have to be
cut to fit, using the tin snips, in order to allow free movement
of the damper.
Equivalent lengths of duct pieces are based on actual tests
and reflect requirements for good venting performance with
any vent hood.