Napoleon Fireplaces Vittoria - GD19 - Manuel (Page 18)

18
W415-1004 / B / 08.10.12
3.10 TOP OR REAR EXIT VERTICAL TERMINATION
Simple venting configurations. See graph to determine the required vertical rise V
T
for the
required horizontal run H
T
.
REQUIRED
VERTICAL
RISE IN
FEET V
T
HORIZONTAL VENT RUN PLUS OFFSET IN FEET H
T
For vent configurations requiring one or more 90° elbows (top exit) or one 90° elbow (rear exit),
the following formulas apply:
Formula 1: H
T
< V
T
Formula 2: H
T
+ V
T
< 35 feet
Example:
V
1
= 3 FT
V
2
= 6 FT
V
3
= 8 FT
V
T
= V
1
+ V
2
+ V
3
= 3 + 6 + 8 = 17 FT
H
1
= 2 FT
H
2
= 2.5 FT
H
R
= H
1
+ H
2
= 2 + 2.5 = 4.5 FT
H
O
= .03 (four 90° elbows - 90°)
= .03 (360° - 90°) = 8.1 FT
H
T
= H
R
+ H
O
= 4.5 + 8.1 = 12.6 FT
H
T
+ V
T
= 12.6 + 17 = 29.6 FT
Formula 1: H
T
< 3.5 V
T
12.6 < 17
Formula 2: H
T
+ V
T
< 35 FT
29.6 < 35
Since both formulas are met, this vent configuration is acceptable.
90°
V
1
V
2 H
1
H
2
The shaded area within the lines represents acceptable
values for H
T
and H
T
90°
90°
90°
0
5 10 15 20
40
10
20
30
3
V
3
(H
T
) < (V
T
)
18.4
35
17.5
17.5