Napoleon Vittoria GD19N Installation And Operation Instructions Manual page 15

Simple venting confi gurations
See graph to determine the required vertical rise V
required horizontal run H
REQUIRED
VERTICAL
RISE IN
FEET V
T
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° elbow
(top exit) or one 90° elbow (rear exit), the following formulas
apply:
Formula 1: H
Formula 2: H
90°
V
1
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(H ) > (V )
T T
FIGURE 17
.
T
.
T
< 3V
T T
+ V < 35 feet
T T
V
90°
H
H
V
1
2
2
90°
FIGURE 18
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Example 7:
V
= 2 ft
1
V
= 1 ft
2
V
= 1.5 ft
3
V = V + V
T 1
H
= 6 ft
1
H
= 2 ft
2
H = H + H
R 1
H
= .03(four 90° elbows - 90°)
O
= .03(90 + 90 + 90 + 90 - 90) = 8.1 ft
H = H + H
T R
H + V
= 16.1 + 4.5 = 20.6 ft
T T
H
Formula 1:
16.1 > 13.5
Since this formula is not met, this vent confi guration is
unacceptable.
H
Formula 2:
20.6 < 35
for the
T
Since only formula 2 is met, this vent confi guration
is unacceptable and a new fi replace location or vent
confi guration will need to be established to satisfy both
formulas.
Example 8:
90°
T
H
V
= 1.5 ft
1
V
= 5 ft
2
V = V + V
T 1
H
= 1 ft
1
H
= 1 ft
2
H
= 10.75 ft
3
3
H = H + H
R 1
H
= .03(three 90° elbows + one 45° elbow - 90°)
O
= .03(90 + 90 + 90 + 45 - 90) = 6.75 ft
H = H + H
T R
90°
H + V
= 19.5 + 6.5 = 26 ft
T T
H
Formula 1:
19.5 = 19.5
H
Formula 2:
26 < 35
Since both formulas are met, this vent confi guration is
acceptable.
+ V
= 2 + 1 + 1.5 = 4.5 ft
2 3
= 6 + 2 = 8 ft
2
= 8 + 8.1 = 16.1 ft
O
< 3V
T T
3V
= 3 x 4.5 = 13.5 ft
T
+ V < 35 feet
T T
H
45°
2
H
V
3
1
1
90°
FIGURE 19
= 1.5 + 5 = 6.5 ft
2
+ H
= 1 + 1 + 10.75 = 12.75 ft
2 3
= 12.75 + 6.75 = 19.5 ft
O
< 3V
T T
3V
= 3 x 6.5 = 19.5 ft
T
+ V < 35 feet
T T
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15
V
2
90°