Top Or Rear Exit Vertical Termination - Napoleon GD36NTR Installation And Operating Instructions Manual

2.10 TOP OR REAR EXIT VERTICAL TERMINATION

Simple venting configurations.
For vent configurations requiring more than zero 90° elbows (top exit) or one 90° elbow (rear exit),
the following formulas apply:
Formula 1: H < V
T
Formula 2: H + V
T
Example 6:
= 5 FT
V
1
= 6 FT
V
2
= 10 FT
V
3
= V = 5 + 6 + 10 = 21 FT
V + V + V
T 1 2 3
= 8 FT
H
1
= 2.5 FT
H
2
= H = 8 + 2.5 = 10.5 FT
H + H
R 1 2
= .03 (four 90° elbows - 90°)
H
O
= .03 (360° - 90°) = 8.1 FT
= H = 10.5 + 8.1 = 18.6 FT
H + H
T R O
= 18.6 + 21 = 39.6 FT
H + V
T T
Formula 1:
Formula 2:
Since both formulas are met, this vent configuration is acceptable.
T
< 40 feet
T
H < 3.5 V
T T
18.6 < 21
H + V < 40 FT
T T
39.6 < 40
(H ) < (V )
T T
See graph to determine the required vertical rise V
required horizontal run H
40
30
REQUIRED
VERTICAL
20
RISE IN
FEET V
T
10
3
0
HORIZONTAL VENT RUN PLUS OFFSET IN FEET H
The shaded area within the lines represents acceptable
90°
V
1
.
T
5 10 15
values for H and H
T T
90°
H
2
V
H 2
1
90°
18.2
W415-0773 / 06.16.09
21
for the
T
20
T
V
3
90°