Figure 11; H R = H; H T = H; H T + V T - Napoleon BGD42P Installation And Operation Instructions Manual

12
when (H
) > (V )
T T
Simple venting configurations

FIGURE 11

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 T
For vent configurations requiring more than one 45º and
one 90° elbow , the following formulas apply:
Formula 1: H
T
Formula 2: H + V
T
Example 4:
45°
W415-0381 / E / 02.09.06
VERTICAL TERMINATION
.
T
< 3V
T
< 40 feet
T
90°
H
H
1
V
1
90°
FIGURE 12
= 1 ft
V
1
= 1.5 ft
V
2
= V
V
T
= 6 ft
H
1
= 2 ft
H
2
= H
H
R
= .03(one 45º elbow + three 90º elbow - 135º)
H
O
= .03(45 + 90 + 90 + 90 - 135) = 5.4 ft
= H
H
T
= 13.4 + 2.5 = 15.9 ft
H + V
T T
Formula 1:
Since this formula is not met, this vent configuration is
unacceptable.
for the
Formula 2:
T
Since only formula 2 is met, this vent configuration is unac-
ceptable and a new fireplace location or vent configuration
will need to be established to satisfy both formulas.
Example 5:
45°
)
T
= 1.5 ft
V
1
= 8 ft
V
2
= V
V
T
= 1 ft
H
1
= 1 ft
H
2
= 10.75 ft
H
3
= H
H
R
= .03(three 90° elbows + two 45° elbow - 135°)
H
O
V
= .03(90 + 90 + 90 + 45 + 45 - 135) = 6.75 ft
2
= H
H
T
= 19.5 + 4.5= 29 ft
2 H + V
T T
Formula 1:
90°
Formula 2:
Since both formulas are met, this vent configuration is ac-
ceptable.
+ V = 1 + 1.5 = 2.5 ft
1 2
+ H = 6 + 2 = 8 ft
1 2
+ H = 8 + 5.4 = 13.4 ft
R O
H < 3V
T T
= 3 x 2.5 = 7.5 ft
3V
T
13.4 > 7.5
H + V < 40 feet
T T
15.9 < 40
90°
H
2
V
45°
H 1
1
90°
FIGURE 13
+ V = 1.5 + 8= 9.5 ft
1 2
+ H + H = 1 + 1 + 10.75 = 12.75 ft
1 2 3
+ H = 12.75 + 6.75 = 19.5 ft
R O
H < 3V
T T
= 3 x 9.5 = 28.5 ft
3V
T
19.5 < 28.5
H + V < 40 feet
T T
29 < 40
V
2
H
3
90°