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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.). 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.
2. Mark and drill a guide hole centered
between roof rafters.
Ø Ø
15"
Ø
Ø
1¼" dia. hole
1¼" dia. hole
REMOVE SHINGLES
REMOVE SHINGLES
11
11
12
12
/
/
"
"
16
16
Guide hole
Guide hole
(centered
(centered
between rafters)
between rafters)
9
9
13
13
/
/
"
"
16
16
18"
18"
3. From the outside, use the guide hole as
a starting point to lay out the installation:
A. Use a T-square to measure 9
left of the guide hole, then up 12
locate the top-left corner of the layout.
B. Starting from the top-left corner, mark
the rectangular cutout (18" W x 20½" H)
and remove only the shingles in this
area.
C. Mark an 11" diameter hole centered on
the guide hole. Cut this hole through the
roof board(s).
D. Mark and cut a 1¼" diameter hole
through
the roof
board(s)
29-1/2"
w h e r e
shown.
4. For flat
roof in-
s t a l l a -
t i o n s ,
build a
22"
curb that
w i l l
mount the blower at a minimum pitch of
2/12. Discharge end of the blower should
be pointed downward.
PREPARE THE
INSTALLATION LOCATION
1. Choose a position on the outside wall.
2. From inside, mark and drill a guide hole
14
1"
20½"
20½"
11" dia.
11" dia.
hole
hole
3. From the outside, use the guide hole as
/
" to the
13
16
/
" to
11
16
2"
7"
2"
3
WALL INSTALLATIONS
Make sure that no wall studs, pipes or
wires run through the opening area.
centered between wall studs.
Ø
Ø
17"
17"
Ø Ø
1¼" dia. hole
1¼" dia. hole
Guide hole
Guide hole
(centered between studs)
(centered between studs)
11
/
"
16
11" dia.
11" dia.
REMOVE
REMOVE
hole
hole
SIDING
SIDING
11
11
13
13
/
/
"
"
16
16
22"
22"
a starting point to lay out the installa-
tion:
A. Use a T-square to measure 11
to the left of the guide hole, then up
14
11
/
" to locate the top-left corner
16
of the layout.
B. Starting from the top-left corner,
mark the rectangular cutout (22" W
x 29½" H) and remove only the
siding in this area.
C. Mark an 11" diameter hole cen-
tered on the guide hole. Cut this
hole through the roof board(s).
D. Mark and cut a 1¼" diameter hole
through the roof board(s) where
shown.
3"
29½"
29½"
/
"
13
16