Broan Best IS102 Mode D'emploi page 5

INSTALL THE DUCTWORK
NOTE: To reduce the risk of fire, use only
metal ductwork.
1. Decide where the ductwork will run between
the hood and the outside.
2. A straight, short duct run will allow the hood
to perform most efficiently.
3. Long duct runs, elbows, and transitions will
reduce the performance of the hood. Use
as few of them as possible.
4. Install a roof or wall cap. Connect 8" round
metal ductwork to cap and work back
towards hood location. Use duct tape to seal
the joints between ductwork sections.
INSTALL SUPPORT SYSTEM
1. At hood location, install 2 x 4 cross framing
between ceiling joists using dimensions
shown.
2. Finish the ceiling surface. Be sure to mark
the location of the ceiling joists and cross
framing.
3. Position the support frame as shown. The
UP ARROW should point towards the ceiling
after installation.
4. Secure the support frame to joists and cross
framing with four screws (6x70mm) and four
washers provided (D.6.4mm). Make sure
screws are driven into center of joists and
framing for maximum strength.
5. Adjust the overall height of the support frame.
Loosen and re-tighten the 4 screws in the
height adjustment slots as necessary.
Insert 4 screws (3.9x9.5mm) and 4 washers
(D.4.5mm) located in the Hardware
Package.
Note that the hood height is 11-7/16" and
that the bottom of the hood must be 24" min.
and 30" max. above the cooktop.
ROOF CAP
SUPPORT
F R A M E
HOOD
24" TO 30" ABOVE
COOKING SURFACE
DRYWALL
9 / "
13
16
WASHERS
(Ø6.4mm)
MOUNTING
SCREWS
(6x70mm)
FRONT
ADJUSTMENT SLOTS
SUPPORT FRAME
- 5 -
8" ROUND
DUCT
8" ROUND
ELBOW
DECORATIVE
FLUE
CROSS FRAMING
CEILING
JOISTS
SUPPORT
FRAME
HEIGHT
TOP VIEW OF
9 / "
13
16
7
13
EAVE
VENT
/ "
16