Top Or Rear Exit Vertical Termination - Napoleon GDS60N Installation And Operating Instructions Manual
Vented natural and propane gas fireplace heaters
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- Installation and operation instructions manual (24 pages) ,
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3.11 TOP OR REAR EXIT VERTICAL TERMINATION
Simple venting configurations.
For vent configurations requiring one or more 90° elbows (top exit) or one or more 90° elbows (rear
exit), the following formulas apply:
Formula 1: H
< V
T
Formula 2: H
+ V
T
Example:
V
= 5 FT
1
V
= 6 FT
2
V
= 10 FT
3
V
= V
+ V
+ V
T
1
2
3
H
= 8 FT
1
H
= 2.5 FT
2
H
= H
+ H
= 8 + 2.5 = 10.5 FT
R
1
2
H
= .03 (four 90° elbows - 90°)
O
= .03 (360° - 90°) = 8.1 FT
H
= H
+ H
= 10.5 + 8.1 = 18.6 FT
T
R
O
H
+ V
= 18.6 + 21 = 39.6 FT
T
T
Formula 1:
Formula 2:
Since both formulas are met, this vent configuration is acceptable.
T
< 40 feet
T
= 5 + 6 + 10 = 21 FT
H
< 3.5 V
T
T
18.6 < 21
H
+ V
< 40 FT
T
T
39.6 < 40
(H
) < (V
)
T
T
See graph to determine the required vertical rise V
required horizontal run H
40
30
REQUIRED
VERTICAL
20
RISE IN
FEET V
T
10
3
0
HORIZONTAL VENT RUN PLUS OFFSET IN FEET H
The shaded area within the lines represents acceptable
.
T
5
10
15
values for H
and H
T
T
18.2
W415-0788 / B / 11.03.10
21
for the
T
20
T
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