Installation Guide
PLAN THE INSTALLATION 
 1. Do not use in a cooking area.                                2. Two ways to connect ductwork to a factory-shipped unit 
ASSEMBLY INSTRUCTIONS 
1. Before installation, you need to know: 
Note: Hanger bar short only can slide into channel A. 
2.Mount with mounting holes and hanger bar 
Slide one hanger bar into the channel on the housing and adjust to fit 
between framing. Hold housing in place so that the housing contacts the 
bottom of the joist. Screw housing to joist through hole A and hole B. 
Screw the hanger bar onto the other side of joist through the hole (refer 
to diagram at right). Screw hanger bar to housing with screw A. 
Hanger Bar Options 
Distance A 
Hanger Bar 
Channel 
13 1/4 in to 15 1/2 in (336mm-394mm) 
Hanger bar (short) 
Channel A (Fig. 1) 
16 1/2 in to 18 7/8 in (419mm-480mm) 
Hanger bar (long) 
Channel B (Fig. 2) 
3.Mount with hanger bars only 
Slide hanger bars onto housing and adjust to fit between framing. 
Extend the hanger bars to the width of the framing. Holding the fan in 
place, position the hanger bar tabs close to the bottom edge of the 
framing. Secure hanger bars to framing using one screw on each end of 
hanger bar (refer to the right diagram). Screw hanger bars to housing 
with screw A. 
Hanger Bar A Option 
Distance A 
Hanger Bar A 
14 in to 23 1/2 in (356mm-597mm) 
Hanger bar (short) 
21 1/4 in to 23 1/2 in (540mm-597mm) 
Hanger bar (long) 
4. Mount to I-joist 
Slide one hanger bar (long) into channel B on the housing and adjust to 
fit between framing. Hold housing in place so that the housing contacts 
the bottom of the joist. Screw housing to joist through hole A and hole B. 
Screw the hangar bar onto the other side of joist through the hole (refer 
to diagram at right). Screw hanger bar to housing with screw A. 
                                                READ AND SAVE THESE INSTRUCTIONS 
                                          Installer: Leave this manual with the homeowner 
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