Installation Instructions
PREPARATION
6PREPARE FOR DUCTWORK
NOTE: Ductwork MUST be vented outside. DO NOT vent into a wall, ceiling, crawlspace, attic or any concealed space.
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
Typical duct arrangement countertop series.
Outside wall
7BLOWER TO DUCTWORK
ALIGNMENT
In general, the use of flexible ducting is discouraged because it can cause severely restricted airflow. However, if the blower outlet and the floor or wall duct location do NOT align well, then flexible METAL ducting can be used to adapt to an offset. Good alignment without use of flexible ducting is best.
NOTE:
Do not exceed the maximum recommended offset of 6″.
Do not allow the flexible ducting to kink or collapse.
Inside wall
cabinet
cabinet
Do stretch the flexible ducting as much as possible to eliminate as much of the corrugation as possible.
Up inside wall to roof | Directly to outside |
or overhang |
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| Peninsula |
Peninsula or island |
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Between floor joists | Through cabinet toe space |
Optional duct arrangement under concrete slab.
PVC duct should be used if installing under a poured concrete slab.
NOTE: PVC sewer pipe type PSM
Schedule 40 ASTM D1785.
6″ (15 cm) | ||
Dia. 90° | to 6″ Round Transition |
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Metal Elbow |
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| 6 (15 cm) |
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| Dia. Metal |
Wall Cap | Concrete | Duct |
6″ (15 cm) Dia. | Slab |
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Metal Duct
6″ Max.
Centerline
to Centerline
Offset
Bottom Venting | Back Venting |
| (Requires 31⁄4″ x 10″) |
A 31⁄4″ x 10″ rectangle to 6″ round transition duct is available at your local building supply store.
NOTE: Illustrations are for planning purposes only.
12″ (30 cm)
Min.
6″ 
(15 cm) 
Dia. PVC
Coupling 
6″ (15 cm) Dia. PVC Sewer Pipe Elbow
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