Napoleon Vittoria GD19N Installation And Operation Instructions Manual page 13

REAR EXIT / HORIZONTAL TERMINATION
Simple venting confi guration
(only two 90° elbows)
See graph to determine the required vertical rise V
required horizontal run H
147
REQUIRED
VERTICAL
RISE IN
INCHES V
T
66
12
HORIZONTAL VENT RUN PLUS OFFSET IN FEET H
The shaded area within the lines represents acceptable
values for H and V
T
For vent confi gurations requiring more than two 90° elbows
the following formulas apply:
Formula 1: H
Formula 2: H
NorthlineExpress.com
(H ) > (V )
T T
FIGURE 14
T
150
100
50
10
0
5
3.4 12.5
.
T
< 3.5V
T T
+ V < 24.75 feet
T T
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Example 5:
H
1
for the
T
V
= 4 ft
1
V
= 1.5 ft
2
V = V + V
T 1
H
= 2 ft
1
H
= 1 ft
2
H
= 1 ft
3
H
= 1.5 ft
4
H = H + H
R 1
H
= .03(four 90° elbows + one 45° elbow - 90°)
O
= .03(90 + 90 + 90 + 90 + 45 - 90) = 9.45 ft
H = H
T R
H + V
= 14.95 + 5.5 = 20.45 ft
T T
H
Formula 1:
14.95 < 19.25
H
Formula 2:
20.45 < 24.75
Since both formulas are met, this vent confi guration is
acceptable.
15
19.
T
90°
H
90°
V
2
H
2
H
3
45°
V
1
FIGURE 15
90°
= 4 + 1.5 = 5.5 ft
2
+ H + H = 2 + 1 + 1 + 1.5 = 5.5 ft
2 3 4
+ H
= 5.5 + 9.45 = 14.95 ft
O
< 3.5V
T T
3.5V
= 3.5 x 5.5 = 19.25 ft
T
+ V < 24.75 feet
T T
W415-0612 / C / 01.25.08
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13
4
90°