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Boiler Size
Vent Pipe Diameter
3 Section
4 Section
5 Section
Example: 20 ft (610 cm) of vent pipe with 1 elbow is equivalent to 15 ft (457 cm) of vent pipe with 2 elbows.
*Note: A condensate trap is only required on models over 10 ft (305 cm) of horizontally run vent piping.
!
Do not insulate or otherwise wrap vent pipe
or fittings. Follow vent pipe manufacturers
installation instructions for horizontal venting.
INSTALLATION PROCEDURE FOR VENTING
SYSTEM THROUGH A WALL
1.
Locate Vent Termination:
Refer to Figure 9 when determining location of vent outlet.
A. At least 12 inches (300 mm) above finished grade,
or at least 12 inches (300 mm) above normally
expected snow accumulation level in geographical
areas where snow accumulates. Avoid locations
where snow could drift and block vent.
B. With vent termination clearance of at least 12
inches (300 mm) from any air openings into
building.
C. At least 3 feet (0.9 m) above any forced air inlet
located within 10 feet (3 m).
D. United States - Terminate vent system at least 4
feet (1.22 m) horizontally from, and in no case
above or below, unless 4 feet (1.22 m) horizontal
distance is maintained, from electric meters, gas
meters, regulators and relief equipment.
Canada - Terminate vent system at least 6 feet
(1.83 m) horizontally from, and in no case above
or below, unless 6 feet (1.83 m) horizontal distance
is maintained, from electric meters, gas meters,
regulators and relief equipment.
E. Venting system shall terminate at least 4 feet
below any eave, soffit, or roof overhang.
F. Venting system shall not terminate underneath any
deck, patio, or similar structure.
G. Put vent on wall away from prevailing winter wind.
VENTING INSTRUCTIONS
Horizontal Vent Pipe Lengths
Max Vent Length*
3" (8 cm)
condensate tee & 2 elbows.
3" (8 cm)
with condensate tee& 2 elbows.
3" (8 cm)
condensate tee & 2 elbows.
WARNING
30 ft (914 cm)
with
30 ft (914 cm)
20 ft (610 cm)
with
Locate or guard vent to prevent accidental contact
with people or pets.
H. For horizontal runs; keep a minimum air space
clearance from any combustible material, electric
wires, and building insulation of 2 inches (.05 m)
for 3" (.08 m) vent pipe.
I.
Horizontal venting shall have slope not less than ¼"
per foot (21mm/m) downward away from the boiler
to prevent collection of condensate throughout the
assembly.
J.
Do not terminate vent over public walkways or
over area where condensate or vapor could be
detrimental to regulators, relief valves, or other
equipment.
K. Do not locate vent termination too close to
shrubbery as flue products may stunt growth or kill
them.
L. Under certain conditions, flue gas will condense,
forming moisture. In such cases, steps should be
taken to prevent building materials at vent terminal
from being damaged by exhaust of flue gas
M. When installing vent cap, secure to noncombustible
wall or a combustible wall thimble. Fasten vent cap
and seal passage as shown in Figures 3, 5a and
5b.
2.
Using template provided as guide, cut hole through
wall. Secure template to inside of wall over hole.
Figures 5a and 5b.
NOTE: If installing through non-combustible wall
make (2) 3-1/2" (.09 m) holes on center through wall.
(Approximately 5-1/4" (13.3 cm) apart on center
3.
For venting through non-combustible wall, remove vent
termination thimble plate assembly from termination
assembly. Figures 5a and 5b.
22
Min Vent Length*
2 ft (61 cm)
with 1 elbow
2 ft (61 cm)
with 1 elbow
2 ft (61 cm)
with 1 elbow
Inlet Pipe
30 ft (914 cm)
with 2 elbows
30 ft (914 cm)
with 2 elbows
20 ft (610 cm)
with 2 elbows
.
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