Top Exit Horizontal Termination - Napoleon Arlington GDS20N Installation And Operating Instructions Manual

14
3.7

TOP EXIT HORIZONTAL TERMINATION

Simple venting confi guration (only one 45° and 90°
elbow)
For vent confi gurations requiring more than one 45° elbow and 90° elbow, the following formulas
apply:
Formula 1: H < V
T
Formula 2: H + V
T
Example 1:
= 8 FT
V
1
= V = 8 FT
V
T 1
= 2.5 FT
H
1
= 2 FT
H
2
= H + H = 2.5 + 2 = 4.5 FT
H
R 1 2
= .03 (one 45° elbow + two 90° elbows - 135°) = .03 (225 - 135°) = 2.7 FT
H
O
= H + H = 4.5 + 2.7 = 7.2 FT
H
T R O
+ V = 7.2 + 8 = 15.2 FT
H
T T
Formula 1:
Formula 2:
Since both formulas are met, this vent confi guration is acceptable.
W415-0496 / D / 11.05.10
T
< 40 feet
T
H < V
T T
7.2 < 8
H + V < 40 FT
T T
15.2 < 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
45°
for the required horizontal run H
T
5 7.5 10 12.5 15
FEET H
T
and V
T
90°
V
1
H
1
90°
16.5
.
T
17.5 20
T
H
2