JVB94SH – GE Profile™ 30" Telescopic Downdraft System
Venting Duct Information
Plan the Ductwork
1
. This downdraft blower system is designed for use with 3-1/4" x 10"
ductwork (can be transitioned to 6" round). Two different discharge
directions are available with side-to-side adjustment for the accurate
alignment of ductwork.
2
. For best performance: choose the ducting option which allows the shortest
length of ductwork and a minimum number of elbows and transitions.
Check location of floor joists, wall joists, wall studs, electrical wiring or
plumbing for possible interference.
Left discharge
(as shipped)
Right
discharge
Specification Revised 5/09
220963
For answers to your Monogram,® GE Profile™
or
GE® appliance questions, visit our website at
GEAppliances.com or call
GE Answer Center® service, 800.626.2000.
Listed by
Underwriters
Laboratories
DUCTWORK LENGTH AND DUCT FITTINGS
NOTE: Do not exceed 150 foot maximum permissible equivalent lengths!
Flexible ducting: If flexible metal ducting is used, all equivalent feet values in the table should be
doubled. The flexible metal duct should be straight and smooth and extended as much as possible.
DO NOT
use flexible plastic ducting.
Add equivalent lengths for all duct pieces and transitions used to ensure that the duct run does not
exceed the maximum 150 feet.
Duct
Equivalent
Duct
Equivalent
Duct
Equivalent
Pieces
Length*
Pieces
Length*
Pieces
Length*
3
1
⁄
4
″
x 10
″
to 6
″
Round
6
″
Round
1 ft. (per
3
1
⁄
4
″
x 10
″
Transition
4 ft.
Straight
foot length)
45°Elbow
8 ft.
90°Elbow
6
″
Round
3
1
⁄
4
″
x 10
″
1 ft. (per
3
1
⁄
4
″
x 10
″
Wall Cap
24 ft.
Straight
foot length)
90°Flat Elbow
33 ft.
with Damper
6
″
Round
3
1
⁄
4
″
x 10
″
6
″
12 ft.
to 3
1
⁄
4
″
x 10
″
2 ft.
Wall Cap
24 ft.
90°Elbow
Transition
with Damper
3
1
⁄
4
″
x 10
″
6
″
to 6
″
Round
2 ft.
6
″
Round
45°Elbow
7 ft.
Transition
Roof Cap
33 ft.
6
″
Round
to 3
1
⁄
4
″
x 10
″
3
1
⁄
4
″
x 10
″
Transition
4 ft.
90°Elbow
14 ft.
90°Elbow
SHOULD NOT EXCEED 150 EQUIVALENT FEET
*Equivalent lengths of duct pieces are based on actual tests conducted by GE Evaluation Engineering
and reflect requirements for good venting performance. See chart for CFM Duct Length.
