Napoleon GDS25N Installation And Operating Instructions Manual page 14

14
EN
Simple venting confi guration (only one 45° and 90°
elbow)
For vent confi gurations requiring more than one 45° elbow and 90° elbow, the following formulas
apply:
Formula 1: H
Formula 2: H
Example:
= 4 FT (1.2m)
V
1
= 1.5 FT (0.5m)
V
2
= V + V
V
T 1
= 2 FT (0.6m)
H
1
= 1 FT (0.3m)
H
2
= 1 FT (0.3m)
H
3
= 1.5 FT (0.5m)
H
4
= H + H
H
R 1
= .03 (one 45° elbow + four 90° elbows - 135°) = .03 (405 - 135°) = 8.1 FT (2.5m)
H
O
= H + H
H
T R
+ V = 13.6 FT (4.2m) + 5.5 FT (1.7m) = 19.1 FT (5.8m)
H
T T
Formula 1:
Formula 2:
Since both formulas are met, this vent confi guration is acceptable.
W415-0547 / J / 07.16.13
The shaded area within the lines represents acceptable values for H
< 4.2 V
T T
+ V < 24.75 feet (7.5m)
T T
= 4 FT (1.2m) + 1.5 FT (0.5m) = 5.5 FT (1.7m)
2
+ H + H = 2FT (0.6m) + 1FT (0.3m) + 1FT (0.3m) + 1.5FT (0.5m) = 5.5 FT (1.7m)
2 3 4
= 5.5 FT (1.7m) + 8.1 FT (2.5m) = 13.6 FT (4.2m)
O
H < 4.2FT (1.3m) V
T T
= 4.2 FT (1.3m) x 5.5 FT (1.7m)= 23.1 FT (7m)
4.2FT (1.3m) V
T
13.6 FT (4.2m) < 23.1 FT (7M)
H + V < 24.75 FT (7.5m)
T T
19.1 FT (5.8m) < 24.75 FT (7.5m)
(H ) > (V )
T T
See graph to determine the required vertical
rise V for the required horizontal run H
T
150 (3810)
147 (3733.8)
REQUIRED
VERTICAL RISE
100 (2540)
IN INCHES
(MILLIMETERS) V
T
57 (1447.8)
HORIZONTAL VENT RUN PLUS
OFFSET IN FEET (METERS) H
90°
V
1
50 (1270)
0
5 10 15
(1.5) (3.1) (4.6) (6.1)
12.5
(3.8)
T
90°
90°
H
3
V
H
2
1
H
2
90°
45°
16.5_2A
.
T
20
T
and V
T
H
4