Installation Instructions
2
PACKAGE CONTENTS
PART NAME APPEARANCE QTY
Fan Body 1
Grille 1
Grille
1
Hanger Bar
4
80F/100F/80-120DS/100HS
80F-DGL
1.   To bend the housing tabs out to 90 degrees and
make housing tabs contact the bottom of the joist.
2.   The housing mounts with 4 tapping screws 
(ø
 4x25mm). Screw housing to joist through lowest 
holes in each mounting flange, then through the
other holes. 
4.   Extend hanger bars to the width of the joists. 
Make sure the fan body is level and perpendicular 
with the joist, and flush with ceiling surface. 
Fasten hanger bars to joists with tapping screws 
(ø 4×25mm). 
Secure hanger bars together with machine screws
(#8-32 x 5/16”).
USING HANGER BARS
3.   Insert hanger bars into the channels on housing.
Sliding hanger bars to allow for your specific 
positioning of housing anywhere between joists 
and span up to 24”.
2. Place housing in opening so that its bottom edge is
flush with finished ceiling. Screw housing to joist
through lowest holes in each mounting flange.
Tabs
Joist
Tabs
Joist
1.   Measure the existing ceiling opening or cut a new
opening to ensure it is large enough to 
accommodate the new fan 
(8 in. x 8 1/4 in. suggested).
EXISTING CONSTRUCTION–ACCESSIBLE 
FROM ABOVE
3. Insert the duct (not provided) into the duct 
connector and tape all ductworks connection to 
make them secure and air tight. Install the duct with 
a gradient 1°~ 2° to the outside.
1. Measure the existing ceiling opening or cut a new
opening to ensure it is large enough to 
accommodate the new fan (9 in. x 9 in. suggested).
A piece of wood (not provided) may be necessary
that is screwed in from below through the ceiling
board. Suggested size is H 4 in. x L 14 in. 
Position the screws far enough from the edge of 
the ceiling board that it does not crumble and give 
way.
Screw Ø4×25 
Joist
Joist
Screw Ø4×25 
Hanger Bar
Screw
Joist
Joist
EXISTING CONSTRUCTION–ACCESSIBLE
FROM BELOW (No Attic Access)
2. Unplug fan connector from junction box.
Remove fan body from housing.
3. Insert the duct (not provided) into the duct
connector and tape all ductworks connection
to make them secure and airtight by through
the ceiling opening. Using wire nuts (not provided)
connect house wires to fan wires as shown in the 
connect wiring diagram on page 3.
5. Insert housing into ceiling opening and secure
housing by using tapping screws (ø 4×25mm).
Insert fan body into housing by using three
machine screws (M4 x 45mm) originally on the fan
body and plug in fan connector.
9.4"
9.4"
8 1/4 in.
8 in.
Joist
( 4 x 25mm)ØScrew
Screws
A
B
HARDWARE CONTENTS
(Images are to scale)
 × 8
Long Wood Screw ( ø 4 x 25mm)
   × 4
Machine Screw (#8-32 x 5/16 in.)
NEW CONSTRUCTION
MOUNT HOUSING WITH FLANGE 
(CEILING/WALL) 
BEFORE INSTALLATION
Turn off power source. Review all safety precautions.
ASSEMBLY INSTRUCTIONS
Ceiling/Wall Models: 80F/80F-DGL/80-120DS/100F
Ceiling Model: 100HS
Wood
4 in.
14 in.
9 in.
9 in.
Gradient
 1º~2º
4. Insert housing into ceiling opening and secure 
housing by using three screws (Ø4x25mm).




