Venting system requirements
Venting system must terminate to the outside.
Do Not terminate the vent system in an attic or other enclosed space.
Do Not use
Use metal vent only. Exception: See "optional venting under a concrete slab", in "Venting methods" below. Rigid metal vent is recommended. Do not use plastic or metal foil vent.
To reduce risk of fire and to properly exhaust air, be sure to vent air outside.
Do Not vent exhaust air into spaces within walls or ceilings or into attics, crawl spaces or garages.
Before making cutouts, make sure there is proper clearance within the wall or floor for the exhaust vent.
Do Not cut a joist or stud unless absolutely necessary. If a joist or stud must be cut, then a supporting frame must be constructed.
Vent materials needed for installation are not supplied.
Determine which venting method to use. See “Venting methods,” below.
Next, determine the equivalent vent length using chart on Page 5. The maximum equivalent vent length is 60 feet (18.3 m).
The blower housing is set to vent straight out the back from the cooktop. To vent down, left or right, see “Installation,” Step 2, Page 6.
This downdraft cooktop is rated at
60 feet (18.3 m) of straight vent or the equivalent.
•If vent length is 10 feet (3 m) or less, 6" (15.2 cm) diameter round vent may be used.
•If vent length is more than 10 feet
(3 m), use 6" (15.2 cm) diameter round or
Thermal breaks: In areas of extreme cold weather, it may be necessary to provide a short length of nonmetallic duct as close to the wall as possible to prevent thermal conduction along the metal vent.
For altitudes above 4,500 ft (1372 m),
reduce recommended vent run by 20%.
For the most efficient and quietest operation:
Use
Do Not exhaust more than one downdraft cooktop into a single vent system.
The length of vent and number of elbows should be kept to a minimum to provide efficient performance.
The size of the vent should be uniform.
Use the fewest number of 90° elbows.
Do Not install two elbows together.
Make sure there is a minimum of 18" (45.7 cm) of straight vent between the elbows if more than one elbow is used. (Elbows too close together cause excess turbulence that reduces airflow.)
Do Not use a 5" (12.7 cm) elbow in a 6" (15.2 cm) or
(8.3 x 25.4 cm) system.
Do Not reduce back to 5" (12.7 cm) system after using 6" (15.2 cm) or
Avoid forming handmade crimps. Handmade crimps may restrict airflow.
Use the recommended vent caps for proper performance. If an alternate wall or roof cap is used, be certain cap size is not reduced and that it has a backdraft damper.
Use duct tape to seal all joints in the vent system.
Use caulking to seal exterior wall or roof opening around the cap.
Venting methods
hole in rear or
side of cabinet 17" (43.2 cm)
The cooktop may be vented through the wall or floor. Common venting methods and the types of materials needed are shown.
Make sure there is proper clearance within the wall or floor for exhaust vent before making cutouts.
inside wall | outside wall | peninsula | |||||||
cabinet |
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(8.3 x 25.4 cm)
transition
elbow
inside wall to roof | directly | between |
or overhang | outside | floor joists |
peninsula
transition |
elbow |
(8.3 x 25.4 cm)
cabinet toe space
to outside
4