Top Or Rear Exit Vertical Termination - Napoleon BGD36CFNTR Installation And Operating Instructions Manual

3.10 TOP OR REAR EXIT VERTICAL TERMINATION

Simple venting configurations.
For vent configurations requiring one or more 90° elbows (top exit) or one or more 90° elbows
(rear exit), the following formulas apply:
Formula 1: H < V
T T
Formula 2: H + V
T T
Example:
V = 5 FT (1.5m)
1
V = 6 FT (1.8m)
2
V = 10 FT (3.1m)
3
V = V + V + V = 5FT (1.5m) + 6FT (1.8m) + 10FT (3.1m) = 21 FT (6.4m)
T 1 2 3
H = 8 FT (2.4m)
1
H = 2.5 FT (0.8m)
2
H = H + H = 8FT (2.4m) + 2.5FT (0.8m) = 10.5FT (3.2m)
R 1 2
H = .03 (four 90° elbows - 90°)
O
= .03 (360° - 90°) = 8.1 FT (2.5m)
H = H + H = 10.5FT (3.2m) + 8.1FT (2.5m) = 18.6FT (5.7m)
T R O
H + V = 18.6FT (5.7m) + 21FT (6.4m) = 39.6FT (12.1m)
T T
Formula 1: H
18.6 FT (5.7m) < 21 FT (6.4m)
Formula 2: H
39.6FT (12.1m) < 40 FT (12.2m)
Since both formulas are met, this vent configuration is acceptable.
< 40 feet (12.2m)
< 3.5V
T T
+ V < 40 FT (12.2m)
T T
(H ) < (V )
T T
See graph to determine the required vertical rise V
required horizontal run H
40 (12.2)
30 (9.1)
REQUIRED
VERTICAL RISE
IN FEET
20 (6.1)
(METERS)V
T
10 (3.1)
3 (0.9)
0
HORIZONTAL VENT RUN PLUS OFFSET IN FEET
The shaded area within the lines represents acceptable
.
T
5 10 15
(1.5) (3.1) (4.6)
(METERS) H
T
values for H and H
T T
18.2A
W415-1345 / B / 10.22.15
21
EN
for the
T
20
(6.1)