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6
Installation
6.8
Installation of the Exhaust and Air Intake system
NOTICE
▶ Consult local and state codes pertaining to special
building code and fire department requirements.
Adhere to national code requirements.
▶ Observe the listed maximum lengths of vent system,
which are boiler model dependent. The maximum
permissible lengths are listed in table 8, page 22.
Optional vent kits are:
1. Parallel or concentric, horizontal (with approved wall terminal) or
vertical
2
Fig. 22 Vent pipes
The termination shall be at least 4 ft. (1,220 mm) for the U.S. and 6 ft.
(1,830 mm) for Canada away from a gas utility meter, service regulator
or the like (for room air applications only).
The termination shall terminate at least 4 ft. (1,220 mm) below, 4 ft.
(1,220 mm) horizontally from, or 1 ft. (305 mm) above any door,
window, or gravity air inlet into any building.
Vent must be at least 12" (305 mm) above grade, anticipated snow line
or roof surface (Canada 18" (457 mm) minimum) ( fig. 23).
Vent termination must be at least 7 ft. (2,135 mm) above a public
walkway ( fig. 24).
12" (305 mm)
12" (305 mm)
minimum
EXHAUST
INTAKE
12" (305 mm)
minimum
Fig. 23 Vent and air pipe position (1) of a sealed combustion system
18
1
6 720 645916-20.1N
minimum
12" (305 mm)
minimum
12" (305 mm)
minimum
6 720 646916-21.1N
Vent must be 3 ft. (915 mm) above any forced air intake within 10 ft.
(3,050 mm) ( fig. 24). Do not extend exposed vent pipe outside the
building beyond recommended distance. Condensate could freeze and
block vent pipe.Vent should terminate at least 3 ft. (915 mm) away from
adjacent walls, inside corners and 5 ft. (1,525 mm) below roof
overhang ( fig. 24). It is not recommended to terminate vent above
any door or window, condensate can freeze causing ice formations.
Do not use chimney as a raceway if another boiler or fireplace is vented
into or through chimney.
All PVC and CPVC vent pipes must be glued, except for the flue gas
adapter. Installed you can slide the pipe onto the adapter, properly
supported and the exhaust pipe must be pitched a minimum of a ¼"
(6.35 mm) per foot back to the boiler. This allows the condensate to
drain away.
All non-steel combustion air and vent pipe materials and fittings must
comply with the following and must be UL approved venting material:
Item
Material
4" (100 mm)
PVC schedule
Intake/combustion
40, 80
air pipe and fitting
PVC-DWV
CPVC schedule
40, 80
PP
M&G Duravent
PolyPro and
Centrotherm
InnoFlue SW
PP-Flex
M&G Duravent
PolyPro Flex and
Centrotherm
InnoFlue SW Flex
4"/6" (100/150
PP Bosch
mm) concentric
Concentric
Intake/combustion
air pipe and fitting
Pipe cement /
PVC
primer
CPVC
Table 6 Approved venting air pipe material
1) For installations in Canada, field supplied plastic vent piping must comply with
CAN/CGA B149.1 (latest edition) and be certified to the Standard for Type BH
Gas Venting systems. ULC S636 Components of this listed system shall not be
interchanged with other vent systems or unlisted pipe/fittings. All plastic
components and specified primers and glues of certified vent systems must be
from a single manufacturer and not mixed with other system manufacturer's vent
system parts. The supplied vent connector and separate available wall
termination kits are certified as part of the GB162 Boiler.
Logamax plus GB162-L.B. 80 kW / 100 kW – 6720645916 (2014/10)
United States
Canada
ANSI/ASTM D1785
BH gas
venting
systems,
ANSI/ASTM D2665
ULC
ANSI/ASTM F441
1)
S636
,
Class IIA -
ANSI Cat IV,
PVC,
approved
Class IIB -
Polypropylene
CPVC,
Class IIC -
Polypro-
ANSI Cat IV,
pylene
approved
Polypropylene
ANSI Cat IV,
approved
Polypropylene
ANSI/ASTM D2564
ANSI/ASTM F493
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