Napoleon GDS26N Installation And Operating Instructions Manual page 17
Vented natural & propane gas fireplaces
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Also See for GDS26N:
- Installation and operating instructions manual (108 pages) ,
- Installation and operation instructions manual (32 pages) ,
- Installation and operation instructions manual (32 pages)
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Simple venting configuration
(only two 90° elbows)
For vent configurations requiring more than two 90° elbows, the following formulas apply:
Formula 1: H
< 3.5V
T
T
Formula 2: H
+ V
< 24.75 feet
T
T
Example:
V
= 4 FT
1
V
= 1.5 FT
2
V
= V
+ V
= 4 + 1.5 = 5.5 FT
T
1
2
H
= 2 FT
1
H
= 1 FT
2
H
= 1 FT
3
H
= 1.5 FT
4
H
= H
+ H
+ H
+ H
= 2 + 1 + 1 + 1.5 = 5.5 FT
R
1
2
3
4
H
= .03 (four 90° elbows + one 45° elbow - 90°)
O
= .03 (90 + 90 + 90 + 90 + 45 - 90) = 9.45 FT
H
= H
+ H
= 5.5 + 9.45 = 14.95 FT
T
R
O
H
+ V
= 14.95 + 5.5 = 20.45 FT
T
T
Formula 1:
H
< 3.5V
T
3.5V
14.95 < 19.25
Formula 2:
H
+ V
< 24.75 FT
T
T
20.45 < 24.75
Since both formulas are met, this vent configuration is acceptable.
(H
T
= 3.5 x 5.5 = 19.25 FT
T
) > (V
)
T
T
See graph to determine the required vertical rise V
required horizontal run H
150
147
REQUIRED
VERTICAL
100
RISE IN
INCHES V
T
66
50
12
0
2.5
3.5
1
HORIZONTAL VENT RUN PLUS OFFSET IN FEET H
The shaded area within the lines represents acceptable
values for H
H
.
T
5
7.5
10
12.5
15
and H
T
T
90°
H
3
V
2
90°
H
2
90°
V
1
1
90°
16.3_2A
W415-0827 / D / 08.10.12
17
for the
T
17.5
20
19.25
T
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