Rear Exit Horizontal Termination - Napoleon GDS60N Installation And Operating Instructions Manual

3.10 REAR EXIT HORIZONTAL TERMINATION

Simple venting configuration
(only two 90° elbows)
For vent configurations requiring more than two 90° elbows, the following formulas apply:
Formula 1: H < V
T
Formula 2: H + V
T
Example:
V = 9 FT
1
V = 6 FT
2
V = V + V = 9 + 6 = 15 FT
T 1 2
H = 3 FT
1
H = 2 FT
2
H = 1.5 FT
3
H = H + H + H
R 1 2 3
H = .03 (four 90° elbows - 90°) = .03 (360° - 90°) = 8.1 FT
O
H = H + H = 6.5 + 8.1 = 14.6 FT
T R O
H + V = 14.6 + 15 = 29.6 FT
T T
Formula 1:
Formula 2:
Since both formulas are met, this vent configuration is acceptable.
T
< 40 feet
T
= 3 + 2 + 1.5 = 6.5 FT
H < V
T T
14.6 < 15
H + V < 40 FT
T T
29.6 < 40
(H ) < (V )
T T
See graph to determine the required vertical rise V
horizontal run H
40
38.3
30
REQUIRED
VERTICAL
20
RISE IN
FEET V
T
10
1.6
0
2.5
1.6
HORIZONTAL VENT RUN PLUS OFFSET IN FEET H
The shaded area within the lines represents acceptable values for H
for the required
T
.
T
5 7.5 10 12.5 15
and H
T
90°
H
3
V
2
90°
H
2
90°
V
1
H
1
90°
16.3
W415-0788 / B / 11.03.10
19
17.5 20
T
T