Preparing for Installation
Electrical Power Supply
WARNING
•Observe all governing codes and ordinances during planning and installation. Contact your local building department for further information.
Electrical Specifications
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 the standard may be obtained from:
National Fire Protection Association 1 Batterymarch Park
Quincy, Massachusetts
This hood requires a dedicated 120 Vac, 60Hz, 15 A circuit.
Plan the Duct Work Installation
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 ceilings or into attics, crawl spaces or garages.
•Tape all duct joints securely to prevent combustion
•Do not exhaust more than one vent into a single duct run.
•Use only duct work constructed of materials deemed acceptable by state, municipal and local codes.
•Range hoods may interrupt the proper flow of smoke and combustion gases from furnaces, gas water heaters and fireplaces. To avoid drawing lethal gases into the home, follow the manufactures recommendation for these devices and consult NFPA and ASHRAE recommendations.
•All duct work materials (including screws and duct tape) must be purchased separately by the customer.
•The hood exhaust connects to an
•Do not rely on duct 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 require to support the duct weight.
•To prevent
may also be required.
•When planning new duct
work, always look for the shortest, most direct route to the outside. Venting can be done through the roof or directly through the back wall to the outside.
•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 100 feet. For each elbow and transition added to the duct work, a certain number of feet must be subtracted from the maximum straight length to compensate for wind resistance. To determine the length the duct work cannot exceed, subtract all of the equivalent lengths of the elbows and transitions listed below from 100 feet.
Duct Work Equivalent Lengths
DUCT PIECE | SUBTRACT |
90° elbow | 15 feet |
45° elbow | 9 feet |
3 1/4” x 10” to 8” round | 1 foot |
Wall cap with damper | 30 feet |
Roof cap | 30 feet |
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, with as much space between each bend as possible.
•For best performance, use round duct instead of rectangular, especially when elbows are required.
•If multiple elbows are used, try to keep a minimum of 24” of straight duct between them. Avoid “S” or “back to back” configurations of adjacent elbows.
•In regions where the weather gets extremely cold, thermal breaks, such as a short section of
•Do not use flexible metal duct.
•Do not use duct work that is smaller in