Installation Guide
ASSEMBLY INSTRUCTIONS 
5. INSTALL DUCTWORK 
Connect the round ductwork (not included) to the damper/duct connector, 
and run the ductwork to a roof or wall cap (not included). Using duct tape 
(not included), secure all the ductwork connections so that they are air tight 
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. 
The ducting from this fan to the outside of building has a strong effect on 
the air flow, noise and energy use of the fan. Use the shortest, straightest 
duct routing possible for best performance, and avoid installing the fan with 
smaller ducts than recommended. Insulation around the ducts can reduce 
energy loss and inhibit mold growth. Fans installed with existing ducts may 
not achieve their rated air flow. 
CONNECT ELECTRICAL WIRING 
Run 120V AC house wiring to the location of the fan. Use only UL-approved connectors (not included) to attach the house wiring to 
the wiring plate. Refer to the wiring diagram and connect the wires as shown. 
For AP904/124-SL       
For AP904/124H-SL       
INSTALL GRILLE 
Install ceiling material to complete the ceiling construction. Then cut around 
the fan housing. 
To attach the grille assembly to the fan housing, pinch the grille springs on 
the sides of the grille assembly, and position the grille into the housing 
with the grille springs in the appropriate slots. Gently push the grille 
assembly towards the ceiling to secure. 
                                                READ AND SAVE THESE INSTRUCTIONS 
                                          Installer: Leave this manual with the homeowner 
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