Top Exit Horizontal Termination - Napoleon GDS60N Installation And Operating Instructions Manual

18
3.9

TOP EXIT HORIZONTAL TERMINATION

Simple venting confi guration (only one 90° elbow)
For vent confi gurations requiring more than one 90° elbow, the following formulas apply:
Formula 1: H < V
T
Formula 2: H + V
T
Example 1:
= 3 FT
V
1
= 8 FT
V
2
= V + V = 3 FT + 8 FT = 11 FT
V
T 1 2
= 2.5 FT
H
1
= 2 FT
H
2
= H + H = 2.5 + 2 = 4.5 FT
H
R 1 2
= .03 (three 90° elbows - 90°) = .03 (270° - 90°) = 5.4 FT
H
O
= H + H = 4.5 + 5.4 = 9.9 FT
H
T R O
+ V = 9.9 + 11 = 20.9 FT
H
T T
Formula 1:
Formula 2:
Since both formulas are met, this vent confi guration is acceptable.
W415-0788 / B / 11.03.10
T
< 40 feet
T
H < V
T T
9.9 < 11
H + V < 40 FT
T T
20.9 < 40
(H ) < (V )
T T
See graph to determine the required vertical
rise V
40
39
30
REQUIRED
VERTICAL
20
RISE IN
FEET V
T
10
0
2.5
HORIZONTAL VENT RUN PLUS OFFSET IN
The shaded area within the lines represents
acceptable values for H
for the required horizontal run H
T
5 7.5 10 12.5 15
FEET H
T
and V
T
90°
V
2
90°
H
90°
1
V
1
16.1A
.
T
17.5 20
T
H
2