8
TYPICAL VENT INSTALLATIONS - VERTICAL TERMINATION
Allowable 3" vent connections (excluding fi replace and air terminal connections)
Rise per foot (recommended)
Rise per foot (allowable)
Vertical run (when not venting horizontally)
Horizontal run
See graph to determine the required vertical rise V
horizontal rise H
.
T
20
19.5
18
16
15
14
12
REQUIRED
VERTICAL
10
RISE IN
FEET (V
)
T
8
6
4
2
1.33
0
1
HORIZONTAL VENT RUN PLUS OFFSET IN FEET (H
24"
MIN.
MINIMUM
4"
VERITICAL
MIN.
FIGURE 3a
W415-0619 / B / 03.03.08
for the required
T
4"
MIN.
2
3
4
5
6
7
FIGURE 3b
MIN
N/A
1/4"
0"
24"
19 1/2 FT
4"
24"
MIN.
MINIMUM
VERITICAL
8
9
10
)
T
MAXIMUM
5 FT MAX.
HORIZONTAL
MAX
FIGURE
2
N/A
N/A
3a, 3c
5 FT
3a, 3b, 3c
15 FT
MAX.
4"
MIN.
FIGURE 3c
19 1/2 FT
MAX.
MAXIMUM
VERTICAL