Napoleon Vittoria GD19N Installation And Operation Instructions Manual page 13

TOP OR REAR EXIT VERTICAL TERMINATION
when (H ) < (V )
T T
Simple venting confi gurations
FIGURE 16
See graph to determine the required vertical rise V
required horizontal run H
REQUIRED
35
VERTICAL RISE
IN FEET
30
V
T
20
17.5
10
3
0
HORIZONTAL VENT RUN PLUS OFFSET IN FEET
The shaded area within the lines represents acceptable
values for H and V
T
For vent confi gurations requiring more than zero 90° elbow
(top exit) or one 90° elbow (rear exit), the following formulas
apply:
Formula 1: H
Formula 2: H
T
.
T
5 10 15
.
T
< V
T T
+ V < 35 feet
T
Example 6:
FIGURE 17
for the
T
V
= 5 ft
1
V
= 10 ft
2
V = V
T 1
H
= 3 ft
1
H
= 2.5 ft
2
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
= 13.6 + 15 = 28.6 ft
T T
H
Formula 1:
13.6 < 15
H
Formula 2:
28.6 < 35
17.5 20
Since both formulas are met, this vent confi guration is
H
acceptable.
T
90°
90°
H
2
V
1
H
1
90°
+ V
= 5 + 10 = 15 ft
2
+ H
= 3 + 2.5 = 5.5 ft
2
+ H
= 5.5 + 8.1 = 13.6 ft
O
< V
T T
+ V < 35 feet
T T
13
V
2
90°
W415-0612 / A / 11.05.07