7
W415-0210 / R / 02.27.08
16”
MINIMUM
40 FT MAXIMUM
3 FT MINIMUM
16”
MINIMUM
40 FT MAXIMUM
3 FT MINIMUM
TYPICAL VENT INSTALLATIONS
(GD36 AND BGD36)
FIGURE 2a
FIGURE 2b
TOP EXIT
REAR EXIT
Use the GD201 periscope kit to locate the air termination
above grade. The periscope must be installed so that when
fi nal grading is completed, the bottom air slot is located a
minimum of 12" above grade. The maximum allowable vent
length is 10 feet.
FIGURE 3a
PERISCOPE TERMINATION
(GD36 AND BGD36)
FIGURE 3b
30”
MINIMUM
12”
MINIMUM
TOP EXIT INSTALLATION
REAR EXIT INSTALLATION
30”
MINIMUM
12”
MINIMUM
MAXIMUM 10FT VENT LENGTH
CORNER TERMINATION
FIGURE 4a
20” MAXIMUM
FIGURE 4b
(BGD36 ONLY)
(WITH RIGID ONLY)
6” RISE
MINIMUM
FIGURE 2c
FIGURE 2d
GD36
* See chart on Page 6
20" MAXIMUM
24
1
/
4
" MINIMUM
PLUS RISE*
24" MAXIMUM
24"
MINIMUM
57" MINIMUM
PLUS RISE**
33"
BGD36
FIGURE 2e
FIGURE 2f
* See chart on Page 6
20" MAXIMUM
24
1
/
4
" MINIMUM
PLUS RISE*
24" MAXIMUM
10"
MINIMUM
42
3
/
8
" MINIMUM
PLUS RISE**
32
3
/
8
"
SPECIAL VENT INSTALLATIONS
GD36
BGD36
The maximum vent length
for a corner installation
is 24", where only 6" of
vertical rise is used. All
corner installations require
a minimum 6" rise. See
FIGURE 4a.
The maximum vent length for
a corner installation is 20" of
horizontal run, in addition to
the 45° offset. In this case
0" rise is acceptable when
using rigid. See FIGURE
4b. Flexible venting must
maintain a 6" rise. See
FIGURE 4a.
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