Venting Application Flow Chart; Horizontal Termination; Vertical Termination - Napoleon GD33NR Installation And Operating Instructions Manual

VENTING APPLICATION FLOW CHART

Horizontal Termination

Vertical rise is equal
to or greater than the
horizontal run
Horizontal run +
vertical rise to
maximum of 40 feet
DEFINITIONS
for the following symbols used in the venting calculations
and examples are:
> - greater than
> - equal to or greater than
< - less than
< - equal to or less than
H
- total of both horizontal vent lengths (H
T
offsets (H ) in feet
O
H
- combined horizontal vent lengths in feet
R
H
- offset factor: .03(total degrees of offset - 90°*) in
O
feet
V
- combined vertical vent lengths in feet
T
HORIZONTAL TERMINATION
(H
T
Simple venting confi guration (only two 90° elbows)
FIGURE 11
Fireplace Vent Exit
Vertical rise
is less than
horizontal run
Horizontal run +
vertical rise to
maximum of 24.75
feet
3.5 times the
vertical rise equal
to or greater than
the horizontal run
) and
R
) < (V )
T

Vertical Termination

Vertical rise is equal
to or greater than
the horizontal run
Horizontal run +
vertical rise to
maximum of 40 feet
ELBOW VENT LENGTH VALUES
1°
15°
30°
45°
90°*
* the fi rst 90° offset has a zero value and is shown in
the formula as -90° when (H
See graph to determine the required vertical rise V
required horizontal run H
T
REQUIRED
VERTICAL
RISE IN
FEET
V
T
HORIZONTAL VENT RUN PLUS OFFSETS IN FEET
The shaded area within the lines represents acceptable
values for H and V .
T T
Vertical rise is less
than horizontal run
Horizontal run +
vertical rise to
maximum of 40
feet
3 times the
vertical rise equal
to or greater than
the horizontal run
feet inches
0.03 0.5
0.45 6.0
0.9 11.0
1.35 16.0
2.7 32.0
) < (V )
T T
for the
T
W415-0662 / A / 03.04.09
9
H
T