WhisperKool 17-1103 - Manual (Page 11)

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Once the horizontal lines have been cut,
make vertical cuts using the inside edge
of the studs as a guide. Once you have
made both vertical cuts, you should have
a rectangular hole in the sheetrock. Now
you have to make the same hole on the
other side of the wall. Since you already
have one hole, this is an easy process.
Using a nail, mark all four corners of the
first hole by making nail holes through the
sheetrock. Then on the other side of the
wall, connect the holes with a pencil mark
and cut.
Sheetrock alone cannot support the
weight of a 65-pound (or more) cooling
system. Therefore, it is necessary to
frame the hole that you have just cut with
upper and lower supports. Using two two-
by-fours 14.5 inches in length and eight
6d nails, secure the upper and lower
supports to the right and left studs, just
inside the sheetrock. Make sure that the
internal height remains at 16" for the
1600, 3000 and 4200 models and 22.75"
for the 6000 and 8000 models so that the
WhisperKOOL system will fit snugly
through the framed cut-out.
Cut vertical lines
along the inside
edge of the studs.
Frame the hole with
two-by-four supports .