- ページ 3

扇風機 Attic Breeze 253AのPDF インストレーション・マニュアルをオンラインで閲覧またはダウンロードできます。Attic Breeze 253A 4 ページ。 Curb-mounted attic fan

Installation Instructions (continued)
Step 6 - Marking the Attic Hole: Depending on roofing type (i.e. tile, metal roofing etc.),
remove roofing material around the desired installation area to expose the roof decking.
Insert a screw part-way into the roof decking in the approximate center of the area chosen to
install the attic vent. Tie one end of string to a permanent marker, and the other end to the
screw. The knot tied to the screw should allow the string to move freely in a circle. Adjust the
length of the string so that when the marker is pulled tight, it measures 10 inches from the
screw. Keeping tension on the string, trace out a circle onto the roof decking. The resulting
circle will have a diameter of 20 inches.
Step 7 - Cutting the Attic Hole: Using a power drill equipped with a ½ inch drill bit, drill a
hole anywhere along the circle that was previously traced out during Step 6. This will be a
pilot hole for the reciprocating saw. Following the circle pattern, insert the reciprocating saw
into the pilot hole and cut out the hole in the roof. When the cutting is complete, clear away
any remaining pieces of wood from the sides of the hole and rafters.
DO NOT CUT THROUGH ANY ROOFING RAFTER OR FRAMING MEMBER. ONLY CUT
AND REMOVE THE ROOF SHEATHING. This can be accomplished by adjusting the
reciprocating saw so that it does not cut deep enough to cut into the rafters or framing
members. Alternatively, if your saw cannot be adequately adjusted, you must cut around any
rafters or framing members which may be located near the attic hole. This may require
drilling additional pilot holes.
Step 8 - Mounting the Curb Box: Position the curb box
over the attic hole. The box should be squared with the
ridge line of the roof. Using the power drill, screw/nut driver
bit, and self-tapping screws, secure the curb box to the roof
decking. Tow in the self-tapping screws at a 45° angle,
starting from the inside wall of the curb box and drilling
through to the roof decking. It is recommended to use 4
inch self-tapping screws for this procedure.
MAKE SURE THAT THE CURB BOX IS SECURELY
Fig. 2 - Mounting the Curb Box
FASTENED TO THE ROOF DECKING. The curb box will
be the primary anchor holding the attic vent to the roof.
Step 9 - Flashing the Curb Box: Flash the curb box using
the most appropriate flashing material for your specific roof
type (see Fig. 3 for common curb flashing materials).
Replace tiles or metal roofing, leaving enough working space
between the edge of the tiles and the curb box so that the
flashing can be slipped into place.
Install the sill flashing first. Screw or nail the flashing into the
curb box. DO NOT NAIL THE FLASHING TO THE ROOF
DECKING. Next, install the side flashing and fasten it in
place. If using step shingles, slip them under each row of
roofing tiles, working your way up from the bottom. Slip the
base of the head flashing under the roofing tiles and set it in
place over the top of the side flashing. Screw the head
flashing into the curb box.
Fig. 3 - Flashing the Curb Box