Napoleon Vittoria GD19N Installation And Operation Instructions Manual page 11

REAR EXIT / HORIZONTAL TERMINATION
when (H ) < (V )
T T
Simple venting confi guration (only two 90° elbows)
See graph to determine the required vertical rise V
required horizontal run H
REQUIRED
VERTICAL
RISE IN
FEET
35
V
33.3
T
30
20
17.5
10
0
.5 2.5 5
HORIZONTAL VENT RUN PLUS OFFSETS IN FEET
The shaded area within the lines represents acceptable
values for H and V
T T
For vent confi gurations requiring more than two 90° elbows
the following formulas apply:
Formula 1: H < V
T
Formula 2: H + V
T
FIGURE 12
T
7.5 10 12.5 15
.
T
< 35 feet
T
Example 4:
H
for the
T
V
= 9 ft
1
V
= 6 ft
2
V = V
T 1
H
= 3 ft
1
H
= 2 ft
2
H
= 1.5 ft
3
H = H
R 1
H
= .03(four 90° elbows - 90°)
O
= .03(90 + 90 + 90 + 90 - 90) = 8.1 ft
H = H
T R
H + V
= 14.6 + 15 = 29.6 ft
T T
Formula 1:
Formula 2:
17.5 20 Since both formulas are met, this vent confi guration is
acceptable.
H
T
90°
H
V
2
H
2
90°
V
1
1
90°
+ V
= 9 + 6 = 15 ft
2
+ H + H
= 3 + 2 + 1.5 = 6.5 ft
2 3
+ H
= 6.5 + 8.1 = 14.6 ft
O
H < V
T T
14.6 < 15
H + V < 35 feet
T T
29.6 < 35
11
3
FIGURE 13
W415-0612 / A / 11.05.07