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18
49-80635-1
INSTALLATION INSTRUCTIONS
Installation Instructions
DESIGN INFORMATION
7
PREPARE FOR DUCTWORK
Determine the best route for ductwork; it can be routed in a
variety of ways depending on the kitchen layout.
IMPORTANT: The downdraft air discharge outlet for this unit is
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Typical duct arrangement countertop series.
To maximize the ventilation performance of the vent system:
1. Minimize the duct run length and number of transitions
and elbows.
2. Maintain a constant duct size.
3. Seal all joints with duct tape to prevent any leaks.
4. Do not use any type of flexible ducting.
If needed, install any make up (replacement) air system in
accordance with local building code requirements. Visit
GEAppliances.com for available makeup air solutions.
• Install ductwork so the piece of duct nearest the downdraft
unit slots INTO the next piece of the duct. Secure the joints
with self-tapping screws and apply duct tape around the
joints to ensure an airtight seal.
Inside wall
cabinet
Up inside wall to roof or
overhang
Directly to outside
Between floor joists Through cabinet toe space
Peninsula or island
Peninsula
Outside wall
cabinet
NOTE: PVC sewer pipe type PSM 12454-B
Schedule 40 ASTM D1785.
Wall Cap
Concrete
Slab
6″ (15 cm)
Dia. PVC
Sewer Pipe
6″ (15 cm)
Dia. Metal
Duct
Pack tightly with gravel
or sand completely
around pipe
3-1/4″ x 10″ Rectangular
to 6″ Round Transition
6″ (15 cm)
Dia. 90°
Metal Elbow
6″ (15 cm) Dia.
Metal Duct
16″
(40.6 cm)
Max.
12″
(30 cm)
Min.
6″
(15 cm)
Dia. PVC
Coupling
6″ (15 cm) Dia.
PVC Sewer Pipe
Elbow
6″ (15 cm) Dia.
PVC Sewer Pipe
Elbow
6″ (15 cm)
Dia. PVC
Sewer
Pipe
6″
(15 cm)
Dia.
PVC
Coupling
30′-0″ (9.14 m) Max.
Optional duct arrangement under concrete slab.
PVC duct should be used if installing under a
poured concrete slab.
Duct Tape
Over Seam and Screw
Screw
Air
Flow
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