Electrical Specifications
WARNING
The electrical service to the range hood should be
installed only by a licensed electrician.
It is the owner’s responsibility to ensure that the electrical
connection of this appliance is performed by a qualified
electrician. The electrical installation, including minimum
supply wire size and grounding, must be in accordance
with the National Electric code ANSI/NFPA* (or latest
revision) and local codes and ordinances.
* A copy of this standard may be obtained from:
National Fire Protection Association
1 Batterymarch Park
Quincy, Massachusetts 02269-9101
Connect the hood to a junction box supplied by a 120
Vac, 60 Hz dedicated, grounded, 3-wire (hot, neutral,
ground) circuit protected by a 15 Amp. circuit breaker
or time delay fuse. It must be installed a minimum of 17
inches above the bottom of the hood.
Planning the Duct Work
WARNING
To reduce the risk of fire and to properly exhaust air,•
be sure to duct air outside the house or building. Do
not vent exhaust air into spaces within walls or ceil-
ings or into attics, crawl spaces or garages.
To prevent combustion by-products smoke or odors•
from entering the home and to improve efficiency,
tape all duct joints securely.
Do not exhaust more than one vent into a single•
duct run.
TO REDUCE THE RISK OF FIRE, USE ONLY•
METAL DUCTWORK.
DO NOT• install an additional in-line or external
blower to increase the length of the duct run. Even
small differences between blower air flow rates can
greatly reduce the air draw of the hood.
All duct work materials (including screws and duct•
tape) must be purchased separately by the customer.
The hood exhaust connects to an 8-inch round duct.•
You can increase the duct size over the duct run if
desired. To prevent a back draft, never decrease the
duct size over the run. If existing duct work is smaller
than 8 inches in diameter, remove it and replace it
with 8-inch duct work.
Do not rely on tape alone to seal duct joints. Fasten•
all connections with sheet metal screws and tape all
joints with certified silver tape or duct tape. Use sheet
metal screws as required to support the duct weight.
To prevent back-drafts, a damper at the duct outlet•
may also be required.
Installation Specifications
When planning new•
duct work, always look
for the shortest, most
direct route to the out-
side. Venting can be
done through the roof
or directly through the
back wall to the out-
side as shown.
Make sure duct work•
does not interfere with
floor joists or wall
studs.
Calculating the Maximum Duct Run Length
The maximum straight duct length for the hood is 50 feet.
To determine the actual maximum duct run, subtract the
equivalent length of each elbow, transition and cap from
50 feet.
EQUIVALENT LENGTHS
Piece Subtract Piece Subtract
8” 90° elbow 7 feet 10” 90° elbow 5 feet
8” 45° elbow 3 feet 10” 45° elbow 2 feet
3¼” X 10”
to round 90°
transition
25 feet
3¼” X 10” to
8”/10” round
transition
4 feet
Roof cap * Wall cap with
damper *
* The equivalent lengths of roof and wall caps vary with
model and configuration. For equivalent length, contact
the manufacturer or a qualified HVAC specialist.
Duct Work Design Tips
Wherever possible, reduce the number of transitions•
and turns to as few sharp angles as possible. Two
staggered 45° angles are better than one 90°.
Keep turns as far away from the hood exhaust as•
possible, and as much space between bends as pos-
sible.
For best performance, use round duct instead of rect-•
angular, especially when elbows are required.
If multiple elbows are used, try to keep a minimum of•
24 inches straight duct between them. Avoid “S” or
“back to back” use of adjacent elbows.
In regions where the weather gets extremely cold,•
use thermal breaks, such as a short section of
non-metallic duct, to avoid indoor heat loss. Locate
the break as close as possible to the outside pass
through point.
Do not use flexible metal duct.•
DO NOT• use duct work that is smaller in cross-
sectional area than the recommended size duct (8”
round).
