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Installation — Wall-Vent Mounted
This gable-mounted unit is designed for attics of average size and operates most efficiently when air intakes are located around the
eaves. Alternatively, air intake may be from opposing gable vents, but never from roof or ridge vents. At least 600 sq. in. of net free
air intake is required per unit for safe and efficient operation. The motor operates on 120 V, 60 Hz, AC current. See the motor label for
amperage.
This unit may be mounted behind any static wall vent, or behind models VX1818 or CX2121 automatic shutters.
TIP:
Much of the preparation, thermostat wiring, testing, and mounting to the frame can be
done before final installation in the attic.
1
Framing the opening
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For new installation or installation behind existing louvers,
using 2 x 4 studs, frame an opening at least 18 ¼-in.
square (depending on stud spacing) on center, on the attic
side of the gable.
18.25" H
18.25" H
2
Covering the opening and cutting
the hole
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Cover the opening with a square piece of plywood,
paneling, or sheetrock, at least 21 ¼-in. square (depending
on stud spacing).
□
Cut a 15-in. diameter hole in the center of this panel to
allow the shroud of the fan to enter the hole.
IMPORTANT:
Block off any remaining open vent area
in the gable.