Vent Termination - Napoleon 9500 series Installation And Operating Instructions Manual

20
Size the combustion air and exhaust piping in accordance
with Table 4. When calculating allowable vent lengths, be
sure to count all termination fi ttings in addition to counting the
concentric vent as a straight pipe.
IOM
IOM
Take the building orientation and the presence of other
buildings or other nearby structures into consideration
when planning the venting system location. Certain
external structures could create air turbulence around the
vent termination leading to downdrafts and similar venting
problems. In windy and hill locations, roof venting may improve
operations. Maximum venting length is based on 30 mph
(48 km) winds, areas where higher gusts are dominant it is
suggested to shorten the horizontal vent length.
The vent and combustion air intake shall be installed so that
both are located in the same wind pressure zone.
DO NOT CONNECT FURNACE TO A CHIMNEY OR FLUE SERVING OTHER APPLIANCES OR A
9.1

VENT TERMINATION

Horizontal vents should pass through the exterior wall. Figure 8 shows a standard horizontal vent detail.
Terminate the vent approximately 8" (203mm) or more from the wall.
Exterior vent pipe greater than 24" (610mm) should be insulated with 1/2" (13mm) insulation to prevent
moisture from freezing within the pipe and accumulating.
Size the exhaust pipe as specifi ed in
Table 4 - Direct and Non-Direct Vent
Lengths. This table lists the maximum
allowable length of pipe with respect to
the number of 90° elbows used. For the
purposes of this calculation, one 90°
elbow is equivalent to two 45° elbows.
Avoid locating the terminal in locations
where dripping condensate may cause
problems such as sidewalks, patios,
above planters, near windows where
exhaust gases may cause fogging, etc.
Avoid locating the termination too close
to shrubs and other vegetation. The
condensate may stunt or kill them.
EQUIVALENTS
Short Radius Elbow = 7 ft (2.13m)
Standard Radius Elbow = 5 ft (1.52m)
Long Radius Elbow = 3 ft (0.91m)
45 Degree Elbow = 2.5 ft (0.76m)
Vent lengths that require more than
6-90° elbows, add listed equivalents
for every elbow up to the maximum
allowable vent length.
W415-0973 / B / 08.28.13
WARNING
!
SOLID FUEL BURNING APPLIANCE.
TABLE 4 - DIRECT AND NON-DIRECT VENT LENGTHS
Maximum Allowable Length Of Exhaust Or Intake. Minimum Vent Length 15 ft.
(4.6 m) or equivalent.
NUMBER OF 90° ELBOWS
INPUT PIPE
K/Btu/hr SIZE
0
1½ 60*
45
2 75*
1½ 60*
60 2 75*
3 100*
2 50*
80
3 100*
2 50*
100
3 100*
120 3 100*
NOTE
When 1½" or 3" pipe is used, exit the cabinet with 2" pipe. Reduce or
increase immediately after exiting the cabinet on both intake and exhaust.
FIGURE 8 - STANDARD (STRAIGHT)
HORIZONTAL VENT DETAIL
(76mm)
EXHAUST
12"
(305mm)
MIN.
GRADE
*18" (457mm) MIN. FOR COLD
CLIMATES (SUSTAINED 0°F (-18°C)
FOR 24 OR MORE CONSECUTIVE
HOURS
!
H3.13
H14.0
1 2 3 4 5 6
55 50 45 40 35 30
1. Count concentric vent
70 65 60 55 50 45
2. Use medium or long
55 50 45 40 35 30
70 65 60 55 50 45
3. One 90° elbow is
95 90 85 80 75 70
4. For direct vent, the
45 40 35 30 25 20
95 90 85 80 75 70
5. For non-direct vent,
45 40 35 30 25 20
95 90 85 80 75 70
95 90 85 80 75 70
* Maximum allowable vent (intake and exhaust) length.
H12.4.2
*3"
MIN.
INTAKE
NOTES
fi tting as straight pipe.
sweep elbows where
possible.
equivalent to two 45°
elbows.
listed lengths are
allowed for each vent
(intake and exhaust).
the listed lengths are
allowed for exhaust.
The intake should have
a 1½" or 2" snorkel
intake fi tting. (Figure 7)