– 6 –
HOOD EXHAUST DUCT
Outside ventilation requires a HOOD EXHAUST
DUCT. Read the following carefully.
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.
REAR EXHAUST: If a rear or horizontal
exhaust is to be used, care should be taken to
align exhaust with space between studs, or wall
should be prepared at the time it is constructed
by leaving enough space between the wall studs
to accommodate exhaust.
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
the approximate feet of equivalent length of
some typical ducts.
3
Duct
Equivalent Length
A. Rectangular-to-Round
Transition Adaptor
B. Wall Cap
40 Ft.
C. 90˚ Elbow
10 Ft.
D. 45˚ Elbow
5 Ft.
E. 90˚ Elbow
25 Ft.
F. 45˚ Elbow
5 Ft.
G. Roof Cap
24 Ft.
5 Ft.
F. 45˚ Elbow
5 Ft.
E. 90˚ Elbow
25 Ft.
B. Wall Cap
40 Ft.
D. 45˚ Elbow
5 Ft.
A. Rectangular-to-Round
Transition Adaptor
5 Ft.
C. 90˚ Elbow
10 Ft.
G. Roof Cap
24 Ft.
Summary of Contents for Advantium SCA2000BCC
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