Vertical Termination - Napoleon The Bayfield GDS25N Installation And Operating Instructions Manual

2.7

vErTICAL TErmINATION

Simple venting configurations.
fIGure 2.7a
For vent configurations requiring more than one 45° and one 90° elbows the following formulas apply:
Formula 1: H < V
T
Formula 2: H + V
T
Example 6:
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 45° elbow + three 90° elbows - 135°)
O
= .03 (45 + 90 + 90 + 90 - 135) = 5.4 FT
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:
Formula 2:
Since both formulas are met, this vent configuration is acceptable.
45°
T
< 40 feet
T
H < 3.5 V
T T
10.9 < 15
H + V < 40 FT
T T
25.9 < 40
(H ) < (V )
T T
See graph to determine the required vertical rise V
required horizontal run H
150
140
130
120
110
100
90
80
70
60
50
40
30
20
10
0
HORIZONTAL VENT RUN PLUS OFFSET IN FEET H
The shaded area within the lines represents acceptable
45°
.
T
5 10 15 20
values for H and V
T T
90°
H
2
V
1
H
1
90°
fIGure 2.7b
TP - TOP ExIT VERTICAL TERMINATION_45
W415-0547 / D / 11.14.08
13
for the
T
T
V
2
90°