Hold the housing so that it is in contact with the bottom of the joist. Attach the housing with
four (4) screws to the joist through the holes in each mounting flange.
1. MOUNT HOUSING TO JOIST OR I-JOIST.
HANGER
BAR
NAIL
DUCT
2. MOUNT WITH HANGER BARS
2a. Sliding hanger bars have been provided, which allow the housing to be positioned accurately
anywhere between the framing. The bars span up to 24 in. and can be used on all types of
framing: I-joist, standard joist, and truss construction. Slide hanger bars onto housing and adjust
as needed to fit between framing.
2b. Extend the hanger bars to the width of the framing. Position the ventilator with the hanger
bar tabs wrapped around the bottom edge of the framing, holding the ventilator in place.
Secure hanger bars to framing using one screw on each end of hanger bar.Select a proper hole
and secure the hanger bars together using flange screws.
3. ATTACH DAMPER/DUCT CONNECTOR
Snap the damper/duct connector onto the fan housing. The connector must be flush with the top
of the housing, and the damper flap should fall closed.Insulated flexible duct is recommended for
the quietest possible installation. If rigid duct is used, a short (1-3 feet) section of insulated flexible
duct will ensure quiet operation.
TYPES OF TYPICAL INSTALLATIONS
1. Do not use in a cooking area.
2. Two ways to connect ductwork to a factory-shipped unit.
ASSEMBLY INSTRUCTIONS
1. Housing mounted to I-joists (Start at “ASSEMBLY INSTRUCTIONS 1”)
2. Housing mounted to joists (Start at “ASSEMBLY INSTRUCTIONS 1” )
3. Housing mounted to truss (Start at step “ASSEMBLY INSTRUCTIONS 2”)
SCREW
2
ROOF CAP*
(with built-in
damper)
ROUND
DUCT*
WALL CAP*
(with built-in
damper)
*
Purchase
separately
POWER
CABLE*
INSULATION*
(Place around and
over Fan Housing.)
Seal gaps
around
Housing.
FAN
HOUSING
ROUND
ELBOW(S) *
Seal duct
joints with
tape.
Keep duct
runs short
PLAN THE INSTALLATION
