Installation - Broan 345 Instructions Manual

INSTALLATION

A
B
1. Locate the ventilator at the center of the rear slope of the roof.
Place it as high on the roof as possible. The location should
be free of obstacles (T.V. leads, electrical lines, etc., see A in
illustration). If the ventilator top is level with the roof peak, it
can't be seen from the street (see B in illustration). Keep this
approximate location in mind as you work from within the attic.
With the location set, measure down from the roof peak to the
center or the powered attic ventilator. Note this measurement.
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2. From inside the attic, measure and place a mark at the point
which is one half the distance between 2 rafters, closest to
the position of the powered attic ventilator. Draw a line parralel
to the rafters. Measure down from the roof peak the distance
found in Step 1 and mark that measurement on the center
line between the 2 rafters.
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9
INSTALLATION
3. Drill a guide hole through the roof at this mark.
4. Cut out the red and blue template found on the carton.
5. On the roof outside, mark 4 lines at 11½" from the guide hole
to form a 23" square. These lines will be used to center the
unit over the hole to be cut off.
Push a large nail through the center of the cardboard template
and into the guide hole.
Using the large half of the template, draw a 17½" diameter
circle on the shingles.
MODEL 345
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