Napoleon GD19-1N, Installation And Operating Instructions Manual

Page: 18 / 128

W415-1351 / 08.29.14
18
EN
3.10 TOP OR REAR EXIT VERTICAL TERMINATION
Simple venting configurations.
See graph to determine the required vertical rise V
T
for the
required horizontal run H
T
.
REQUIRED
VERTICAL RISE
IN FEET
(METERS) V
T
HORIZONTAL VENT RUN PLUS OFFSET IN FEET (METERS) H
T
For vent configurations requiring one or more 90° elbows (top exit) or one 90° elbow (rear exit),
the following formulas apply:
Formula 1: H
T
< V
T
Formula 2: H
T
+ V
T
< 35 feet (10.7m)
Example:
V
1
= 3 FT (0.9m)
V
2
= 6 FT (1.8m)
V
3
= 8 FT (2.4m)
V
T
= V
1
+ V
2
+ V
3
= 3FT (0.9m) + 6FT (1.8m) + 8FT (2.4m) = 17FT (5.2m)
H
1
= 2 FT (0.6m)
H
2
= 2.5 FT (0.8m)
H
R
= H
1
+ H
2
= 2FT (0.6m) + 2.5FT (0.8m) = 4.5FT (1.4m)
H
O
= .03 (four 90° elbows - 90°)
= .03 (360° - 90°) = 8.1 FT (2.5m)
H
T
= H
R
+ H
O
= 4.5FT (1.4m) + 8.1FT (2.5m) = 12.6FT (3.8m)
H
T
+ V
T
= 12.6FT (3.8m) + 17FT (5.2m) = 29.6FT (9m)
Formula 1: H
T
< 3.5 V
T
12.6FT (3.8m) < 17FT (5.2m)
Formula 2: H
T
+ V
T
< 35 FT (10.7m)
29.6FT (9m) < 35FT (10.7m)
Since both formulas are met, this vent configuration is acceptable.
90°
V
1
V
2
H
1
H
2
The shaded area within the lines represents acceptable
values for H
T
and H
T
90°
90°
90°
V
3
(H
T
) < (V
T
)
18.4A
0 5
(1.5)
15
(4.6)
40 (12.2)
10 (3.1)
20 (6.1)
30 (9.1)
3 (0.9)
35 (10.7)
17.5 (5.3)
20 (6.1)
17.5
(5.3)
10
(3.1)