2
11" dia.
hole
29½"
11" dia.
hole
1¼"
dia. hole
12
7
/
8
"
10¾"
25"
7¼"
7¼"
1¼"
dia. hole
9
1
/
8
"
9
1
/
8
"
W
a
ll
S
tu
d
10¾"
24¾"
28¼"
W
a
ll Stud
12
7
/
8
"
W
a
ll
S
tu
d
W
a
ll Stud
REMOVE
SIDING
REMOVE
SIDING
8½"
8½"
Pilot
Pilot
Hole
Hole
Pilot
Hole
OUTSIDE - WALL VIEW
OUTSIDE - WALL VIEW
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.
1. Choose a position on the outside wall. Make sure
that no wall studs, pipes or wires run through the
opening area.
PREPARE THE INSTALLATION
LOCATION
ROOF INSTALLATIONS
PREPARE THE INSTALLATION
LOCATION
WALL INSTALLATIONS
ALL INSTALLATIONS
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 prevailing winds.
20½"
11"
dia.
hole
20½"
10
3
/
8
"
1¼"
dia. hole
10
3
/
8
"
8½"
8½"
20¾"
20¾"
7¼"
7¼"
1¼"
dia. hole
9
1
/
8
"
9
1
/
8
"
REMOVE
SHINGLES
Roof Rafter
REMOVE
SHINGLES
11"
dia.
hole
Roof Rafter
Pilot
Pilot
Hole
Hole
Pilot
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" rectangle.
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 1
6¾"
2"
28¼"
24¾"
2"
Figure 2
PREPARE THE BLOWER
1. Unpack the blower assembly.
2. Remove the cover and screws.
3. Remove and discard cardboard from blower wheel.
4. Remove the wiring box cover and screws.
5. Attach an appropriate U.L. approved cable con-
nector in the hole at the rear of the wiring box.
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 25" x 29½" rectangle. Cut
and remove only the siding 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.
Figure 3
