Vertical Termination - Napoleon Arlington GDS20N Installation And Operation Instructions Manual

when (H ) < (V )
T T
FIGURE 9
See graph to determine the required vertical rise V
the required horizontal run H
REQUIRED VERTICAL RISE IN
FEET (V )
T
The shaded area within the lines represents acceptable
values for H and V
T
For vent configurations requiring more than one 45º and
one 90° elbow , the following formulas apply:
Formula 1: H
Formula 2: H
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VERTICAL TERMINATION

45°
.
T
HORIZONTAL VENT RUN
PLUS OFFSETS IN FEET (H
.
T
< V
T T
+ V < 40 feet
T T
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Example 3:
FIGURE10
45°
H
1
for
T
V = 5 ft
1
V = 10 ft
2
V = V + V
= 5 + 10 = 15 ft
T 1 2
H = 3 ft
1
H = 2.5 ft
2
H = H + H
= 3 + 2.5 = 5.5 ft
R 1 2
H
= .03(one 45º elbow + three 90º elbows - 135º)
O
= .03(45+90+90+90-135)=5.4
H = H + H
= 5.5 + 5.4 = 10.9 ft
T R O
H + V = 10.9 + 15 = 25.9 ft
T T
Formula 1: H < V
T
10.9 < 15
H + V
Formula 2:
T
25.9 < 40
Since both formulas are met, this vent configuration is ac-
ceptable.
)
T
V
2
90°
H
90°
2
V
1
90°
T
< 40 feet
T
W415-0496 / B / 08.10.05
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