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English
I
nstallation
Instruction
s
Planning the Ductwork
WARNING
•
To prevent combustion by-products, smoke, or odors from entering the home, and to improve
efficiency, tape all duct joints securely.
•
Range hoods may impede proper flow of smoke and combustion gases from furnaces, gas water
heaters, and fireplaces. To avoid drawing lethal gases into the home, follow the manufacturer’s
directions for these devices and NFPA/ASHRAE recommendations.
•
Failure to install a remote blower or proper ductwork may cause a backdraft and insufficient
venting of smoke/fumes.
•
DO NOT add an in-line or external blower to lengthen the duct. Even small differences between
blower air-flow rates can greatly reduce the hood’s air draw.
CAUTION
To reduce risk of fire and to properly exhaust air,
never
duct air
into interior spaces
.
WARNING
During duct installation, ensure the damper flaps on top of the hood can open freely.
A
B
•
Building codes may require makeup air systems
to be used with ventilation systems that move air
at greater than the specified rate (CFM), which
rate depends on locale. In designing the system,
consult an HVAC specialist for local requirements
and to ensure best performance.
•
All ductwork material (incl. screws and foil tape)
shall be provided
by the customer.
•
Ductwork must not interfere with floor joists or wall studs.
•
On dual-exhaust models, the two 8” exhausts may be merged into one 10” duct using Dacor
Transition Kit AHT10.
•
Fasten all joints with sheet-metal screws, and seal with certified duct/foil tape.
•
Typically, the blower vents through the hood top (A, above); however, the blower can be rotated
to vent through the rear (B, above). When planning ductwork, always find the shortest, most
direct route to the outside.
Duct-Length Calculation Table
The type of duct determines the hood’s maximum straight duct length.
To determine your
maximum length, start with the duct run’s total max. length, then subtract all of the ductwork
equivalent lengths. (See the chart.)
Duct Type
Max. Duct Run
8-in. Round
60 feet
10-in. Round
50 feet
3 1/4-in x 10-in Rectangular
