FAN HOUSING ASSEMBLY & INSTALLATION
Figure 4
Top Housing Sheet
Side Housing Sheet
Guard Clip
Overlapping Corner Hole
Guard Latch
If the fan and housing are factory assembled, you may skip this paragraph.
The housing consists of 4
housing sheets that must be fastened together. The side sheets are identical. The bottom sheet has five 7/8-inch
diameter drain holes. Assembly should be done inside the building in which it will be placed. To assemble the
housing, place bottom sheet so that the flange on the long side of the sheet is down. Then take the sides and
place them at 90° to the bottom and over the flange of the bottom sheet. Take the top and place it at 90° to the
sides and over the flange of the side sheets. The two inside holes, as well as the hole in the corner at the
intersection of the two flanges, should overlap. Using two 1/4” x 3/4” bolts and two 1/4” whiz-lock nuts, fasten the
two sheets at the overlapping holes on the inside corner of the two sheets. Push the bolts from the outside in, and
thread the nuts on the inside. This process should be repeated for the two remaining sheets. After the fourth
sheet has been fastened to the third, it should also be fastened to the first, completing the housing. See Figure 4A.
Next, lift the housing into place in the wall opening. Using the 4 overlapping corner holes and the 3 individual
holes in each sheet flange, fasten the housing to the building frame (hardware not provided).
After securing the housing to the frame, attach the 2 guard latches each to the side and bottom housing sheets as
shown in Figure 4 using the #10 screws provided. The screws should go through the latch, through the housing,
and into the building frame. In the same manner, attach the two guard clips to the top housing sheet using #10
wood screws as shown in Figure 4.
Install flashing around the housing and caulk to properly seal fan to wall.
Page 3
Figure 4A
Housing
Sheet
Overlap
