T For The; Formula 1: H Formula 2: H T; T < V T; T < 40 Feet - Napoleon The Dream BGD90NT Installation And Operation Instructions Manual

8
TOP EXIT VERTICAL TERMINATION
when (H ) < (V )
T T
FIGURE 9
Simple venting confi gurations
See graph to determine the required vertical rise V
required horizontal run H
TOP VERTICAL TERMINATION
when (H ) > (V )
T T
Simple venting confi gurations
FIGURE 10
See graph to determine the required vertical rise V
required horizontal run H
For vent confi gurations requiring more than two 90° elbow
(top exit) or one 90° elbow (rear exit), the following formulas
apply:
MAXIMUM
VERTICAL
R I S E I N
FEET
V
T
HORIZONTAL VENT RUN PLUS OFFSET IN FEET
The shaded area within the lines represents acceptable
values for H and V .
T T
W415-0614_05.15.07
.
T
T
.
T
REQUIRED VERTI-
CAL RISE IN FEET
V
T
HORIZONTAL VENT RUN PLUS OFFSET IN FEET
The shaded area within the lines represents acceptable
values for H and V
T
For vent confi gurations requiring more than zero 90° elbow
(top exit) or one 90° elbow (rear exit), the following formulas
apply:
Formula 1: H
for the
T Formula 2: H
Formula 1: H
Formula 2: H
Example 7:
V = 2 ft
1
V = 1 ft
2
V = 1.5 ft
3
V = V + V
for the
T 1
H = 6 ft
1
H = 2 ft
2
H = H + H
R 1
H = .03(four 90° elbows - 90°)
O
= .03(90 + 90 + 90 + 90 - 90) = 8.1 ft
H = H + H
T R
H + V = 16.1 + 4.5 = 20.6 ft
T T
Formula 1: H
16.1 > 13.5
Since this formula is not met, this vent confi guration is
unacceptable.
H
Formula 2: H
T
20.6 < 40
Since only formula 2 is met, this vent confi guration
is unacceptable and a new fi replace location or vent
confi guration will need to be established to satisfy both
formulas.
.
T
< V
T T
+ V < 40 feet
T T
< 3V
T T
+ V < 40 feet
T T
FIGURE 11
+ V = 2 + 1 + 1.5 = 4.5 ft
2 3
= 6 + 2 = 8 ft
2
= 8 + 8.1 = 16.1 ft
O
< 3V
T T
3V = 3 x 4.5 = 13.5 ft
T
+ V < 40 feet
T T
H
T