Venting Requirements - Jenn-Air JXI5036WS Installation Instructions And Use & Care Manual

The chimneys can be adjusted for different ceiling heights. See
the following chart.
Vented Installations
Min. ceiling height
7' 9" (2.36 m)
Electric cooking
surface
Gas cooking 8' (2.44 m)
surface
Non-Vented (Recirculating) Installations
Min. ceiling height
7' 9" (2.36 m)
Electric cooking
surface
Gas cooking 8' (2.44 m)
surface
*NOTE: The range hood chimneys are adjustable and designed
to meet varying ceiling or soffit heights depending on the
distance "C" between the bottom of the range hood and the
cooking surface. For higher ceilings, a Stainless Steel Chimney
Extension Kit Part Number W10635231 is available from your
dealer or an authorized parts distributor. The chimney extension
replaces the upper chimney shipped with the range hood.

Venting Requirements

(vented models only)
Vent system must terminate to the outdoors, except for non-
vented (recirculating) installations.
Do not terminate the vent system in an attic or other enclosed
area.
Do not use 4" (10.2 cm) laundry-type wall cap.
Use metal vent only. Rigid metal vent is recommended.
Plastic or metal foil vent is not recommended.
The length of vent system and number of elbows should be
kept to a minimum to provide efficient performance.
For the most efficient and quiet operation:
Use no more than three 90° elbows.
Make sure there is a minimum of 24" (61.0 cm) of straight
vent between the elbows if more than 1 elbow is used.
Do not install 2 elbows together.
Use clamps to seal all joints in the vent system.
Use caulking to seal exterior wall or roof opening around the
cap.
The size of the vent should be uniform.
Cold Weather Installations
An additional back draft damper should be installed to minimize
backward cold air flow and a thermal break should be installed to
minimize conduction of outside temperatures as part of the vent
system. The damper should be on the cold air side of the thermal
break.
The break should be as close as possible to where the vent
system enters the heated portion of the house.
Makeup Air
Local building codes may require the use of makeup air systems
when using ventilation systems greater than specified CFM of air
movement. The specified CFM varies from locale to locale.
Consult your HVAC professional for specific requirements in your
area.
Venting Methods
This range hood is factory set for venting through the roof.
Max. ceiling height
A 8" (20.3 cm) round vent system is needed for installation (not
included). The hood exhaust opening is 8" (20.3 cm) round.
9' 10" (3.0 m)
NOTE: Flexible vent is not recommended. Flexible vent creates
back pressure and air turbulence that greatly reduce
9' 10" (3.0 m)
performance.
For Non-Vented (recirculating) Installations
If it is not possible to vent cooking fumes and vapors to the
Max. ceiling height
outside, the hood can be used in the non-vented (recirculating)
10' 4" (3.15 m)
version, using a Recirculation Kit (which includes charcoal filters
and a deflector). To order, see the "Assistance or Service"
section.
10' 4" (3.15 m)
Non-vented (recirculating)
A. Deflector
B. 8" (20.3 cm) round vent
NOTE: Wall venting can be an option for 2-story homes.
Calculating Vent System Length
To calculate the length of the system you need, add the
equivalent feet (meters) for each vent piece used in the system.
Vent piece
45° elbow
90° elbow
Maximum equivalent vent length is 35 ft (10.7 m).
A
B
Roof Venting
A
B
A. Roof cap
B. 8" (20.3 cm) round vent
8" (20.3 cm) round
2.5 ft
(0.8 m)
5.0 ft
(1.5 m)
5