Broan BXT1 Series Manual page 2

IMPORTANT
For Non-ducted (Duct free) Installation:
a) Purchase non-ducted filter separately, part number HPFX1.
b) Remove and discard damper/duct connector and trap door (See Step 3
in "Preparing the range Hood," on page 3).
c) Follow all steps except steps inside dotted lines.
For Ducted Installation:
Follow all steps, including steps inside dotted lines except Step 3 in
"Preparing the range Hood," on page 3.
TOOLS AND MATERIAL REQUIRED
TOOLS

Drill

Sabre saw

Pliers
For ducted installation ONLY:
 
Saber saw
 
Metal snips
MATERIALS

Electrical wiring and supplies of type to comply with local codes
 
Roof or wall cap
 
Roof cement or caulk
For installation on kitchen cabinets with recess bottoms only:

Two 1" x 2" x 12" (approximate length) wood strips (purchase locally)

Four 1¼" long flat heat wood screws (purchase locally) to fasten
strips to cabinet bottom
PLANNING DUCTWORK INSTALLATION
Begin planning ductwork by deciding where the duct will run between
the range hood and the outside. For best performance, use the shortest
possible duct run and a minimum number of elbows. There are several
choices shown - FIGS. 1A - 1F.
If needed, a 3¼" x 10" rectangular ducting range hood can be converted to
a round duct by means of a transition.
FIG. 1A. Ducting directly through the wall (for range hoods mounted on an
exterior wall). Shown are two ways to duct through an outside wall. If a wall
cap is used directly off the back of the hood, special care must be taken to
make sure that the damper in the damper/duct connector on the hood and
damper in the wall cap do not interfere with each other when the hood is
operating. This could result in either inadequate air delivery or back drafts.
If this condition does exist, remove the hood damper flap. Sometimes when
using a wall cap it is easier to duct vertically and then use an elbow as
shown in FIG. 1B.
FIG. 1C. Ducting straight up through the roof using 3¼" x 10" rectangular
duct. (For single story installations.)
FIG. 1D. Ducting between the ceiling joists (for multi-story installations) or
through the soffit space above the cabinets (where the soffit connects to
an outside wall).
FIG. 1E. Straight up through the roof using 3¼" x 10" to 6" round duct
transition and 6" round duct (for single-story installations).
FIG. 1F. Straight up through the roof using 7" round duct (for single-story
installations).

Flat blade and
Phillips screwdriver

Tape measure or ruler
and pencil
 
Duct and metal foil duct tape
FIG. 1A
639
WALL CAP
FIG. 1B
FIG. 1C
FIG. 1D
ADJUSTABLE ELBOW
6"
ROUND DUCT
FIG. 1E
3¼" 10" 6"
X TO
DUCT TRANSITION
FIG. 1F
7"
ROUND DUCT
HJ0191
- 2 -
649
OR
639
WALL CAP OR
3¼" 10" 401
X DUCT
634 644
ROOF CAP OR
3¼" 10" 401
X DUCT
419
WALL CAP
406
3¼" 10"
X TO
DUCT TRANSITION
634 644
ROOF CAP OR
6"
ROUND DUCT
ROUND
411
ROOF CAP
OPTIONAL DAMPER
407
BP87Q
MODEL
649
641
6"
ROUND
411
406
634 644
OR