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PREPARE THE
INSTALLATION LOCATION
ROOF INSTALLATIONS
1. Locate the blower on the rear slope of the
roof. Place it in a location to minimize
duct run. The location should be free of
obstacles (T.V. leads, electrical lines,
etc.). Bear in mind, if the blower top is
level with the roof peak, it will not be seen
from the street. Keep this approximate
location in mind as you work from within
the attic.
Figure 1
8½"
8½"
REMOVE
REMOVE
SHINGLES
SHINGLES
10
10
3
3
/
/
"
"
8
8
Pilot
Pilot
Pilot
Hole
Hole
Hole
1¼"
1¼"
dia. hole
dia. hole
OUTSIDE - ROOF VIEW
OUTSIDE - ROOF VIEW
From inside the attic space:
2. Drill a PILOT HOLE up through the roof,
8½" from the inside edge of a ROOF
RAFTER.
From outside - on the roof:
3. Measure and mark the 20¾" x 20½" rect-
angle. Cut and remove only the shingles
inside this rectangle.
4. Measure and mark the 11" DIAMETER
HOLE and the 1¼" DIAMETER HOLE.
Cut these holes all the way through the
roof.
Figure 2
2 "
5. For flat roof installations, build a curb that
will mount the blower at a minimum pitch of
2/12. See Figure 2. Discharge end of the
blower should be pointed away from pre-
vailing winds.
20¾"
20¾"
11"
11"
dia.
dia.
hole
hole
20½"
20½"
9
9
1
1
/
/
"
"
8
8
7¼"
7¼"
PREPARE THE
INSTALLATION LOCATION
WALL INSTALLATIONS
1. Choose a position on the outside wall.
Make sure that no wall studs, pipes or
wires run through the opening area.
Figure 3
12
12
7
7
/
/
"
"
8
8
dia. hole
dia. hole
From inside the wall:
2. Drill a PILOT HOLE through the wall, 8½"
from the inside edge of a WALL STUD.
From outside - on the wall:
3. Measure and mark the 24¾" x 28¼"
rectangle. Cut and remove only the sid-
ing inside this rectangle.
4. Measure and mark the 11" DIAMETER
HOLE and the 1¼" DIAMETER HOLE.
Cut these holes all the way through the
wall.
PREPARE THE BLOWER
ALL INSTALLATIONS
1. Unpack the blower assembly.
2. Remove the cover and screws.
"
6 ¾
3. Remove and discard cardboard from blower
wheel.
4. Remove the wiring box cover and screws.
5. Attach an appropriate U.L. approved cable
connector in the hole at the rear of the wiring
box.
3
24¾"
25"
10¾"
10¾"
REMOVE
REMOVE
8½"
8½"
SIDING
SIDING
Pilot
Pilot
Pilot
Hole
Hole
Hole
1¼"
1¼"
7¼"
7¼"
OUTSIDE - WALL VIEW
OUTSIDE - WALL VIEW
11" dia.
11" dia.
hole
hole
28¼"
29½"
9
9
1
1
/
/
"
"
8
8
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