Napoleon Castlemore GDS26N Installation And Operation Instructions Manual page 13

TOP OR REAR EXIT VERTICAL TERMINATION
Simple venting confi gurations
See graph to determine the required vertical rise V
required horizontal run H
40
REQUIRED
VERTICAL RISE
IN FEET
V
30
T
20
10
3
0
HORIZONTAL VENT RUN PLUS OFFSET IN FEET
The shaded area within the lines represents acceptable
values for H and V
T
For vent confi gurations requiring more than zero 90° elbow
(top exit) or one 90° elbow (rear exit), the following formulas
apply:
Formula 1: H
Formula 2: H
(H ) < (V )
T T
.
T
5 10 15
.
T
< V
T T
+ V < 40 feet
T T
Example 6:
FIGURE 16
FIGURE 17
for the
T
V
= 5 ft
1
V
= 6 ft
2
V
= 10 ft
3
V = V
T
H
= 8 ft
1
H
= 2.5 ft
2
H = H
R
H
= .03 (four 90° elbows - 90°)
O
= .03 (90 + 90 + 90 + 90 - 90) = 8.1 ft
H = H
T
H + V
= 18.6 + 21 = 39.6 ft
T T
Formula 1:
Formula 2:
Since both formulas are met, this vent confi guration is
acceptable.
20
H
T
V
3
90°
V
2
90°
H
2
V
H
1
1
90°
+ V + V
= 5 + 6 + 10 = 21 ft
1 2 3
+ H
= 8 + 2.5 = 10.5 ft
1 2
+ H
= 10.5 + 8.1 = 18.6 ft
R O
H < V
T T
18.6 < 21
H + V < 40 feet
T T
39.6 < 40
13
90°
W415-0607 / A / 01.18.08