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Installation
Greenstar FS
6 720 810 590 (2015/05)
Vent termination must be at least 1 foot (305 mm) above grade,
anticipated snow line or roof surface (Canada
1-1/2 feet (457 mm) minimum) (
fig. 31 [Y
A
], page 40).
Vent termination must be at least 7 feet (2135 mm) above a public
walkway (
fig. 31 [X
5
], page 40). Ensure that condensate spilling
from the termination does not create a hazard or a nuisance.
Vent termination must be 3 feet (915 mm) above any forced air intake
within 10 feet (3050 mm) (
fig. 31 [1], [Y
B
], page 40).
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 feet (915 mm) away from adjacent
walls, inside corners and 5 feet (1525 mm) below roof overhang
(
fig. 31 [X
2
], [X
4
], page 40).
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/CPVC vent pipes must be glued, except for the flue gas adapter-
pipe connection.
All PP/PVC/CPVC combustion air and vent pipe materials and fittings
must comply with the following and must be UL approved venting
material:
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 intermingled with other
system manufacturer's vent system parts.
The supplied vent connector and separate available vent termination are certified as a part of the Greenstar Boiler
The exhaust pipe must be properly supported and
pitched a minimum of ¼ inch (6.35 mm) per foot back to
the boiler. This allows the condensate to properly drain.
NOTICE:
Combustion air and vent pipe materials for
KBR42-3A & KWB42-3A.
Heat damage to 2 inch PVC pipes.
▶ KBR42-3A & KWB42-3A appliances combustion air
and vent pipes, use 2 inch CPVC-pipes or 3 inch
pipes.
Material
Item
United states
Canada
KBR16-3
KBR21-3
KBR28-3
KBR35-3
KBR42-3
KWB28-3
KWB35-3
KWB42-3
PVC schedule 40, 80
2" (50 mm) Vent or air pipe and fitting ANSI/ASTM D1785
BH Gas venting systems,
ULC S636
1)
,
Class IIA - PVC,
Class IIB - CPVC,
Class IIC - Polypropylene
(certified to ULC S636)
1) Components of the certified vent systems must not be interchanged with other vent systems or unlisted pipe fittings. Plastic components, and specified primers and glues of
the certified vent system must be from a single system manufacturer and not intermixed with other system manufacturer's vent system parts.
X
X
X
X
X
X
PVC-DWV
ANSI/ASTM D2665
X
X
X
X
X
X
CPVC schedule 40, 80
ANSI/ASTM F441
X
X
X
X
X
X
X
X
PVC schedule 40, 80
3" (76 mm) Vent or air pipe and fitting ANSI/ASTM D1785
X
X
X
X
X
X
X
X
PVC-DWV
ANSI/ASTM D2665
X
X
X
X
X
X
X
X
CPVC schedule 40, 80
ANSI/ASTM F441
X
X
X
X
X
X
X
X
PP rigid venting
2" (50 mm) vent or air pipe
M&G Duravent PolyPro and
Centrotherm InnoFlue
ANSI Cat IV
X
X
X
X
X
X
PP rigid venting
3" (80 mm) vent or air pipe
M&G Duravent PolyPro and
Centrotherm InnoFlue
ANSI Cat IV
X
X
X
X
X
X
X
X
PP rigid venting
3"/5" (80/125 mm) concentric
Bosch (manufactured by M&G
Duravent)
ANSI Cat IV
X
X
X
X
X
X
X
X
PP rigid venting
ANSI Cat IV
X
X
X
X
X
X
X
X
PP Flex
Same as 3” PP above
ANSI Cat IV
X
X
X
X
X
X
X
X
PP Flex
Same as 2” PP above
ANSI Cat IV
X
X
X
X
X
X
X
X
PVC
Pipe cement/primer
ANSI/ASTM D2564
X
X
X
X
X
X
X
X
CPVC
ANSI/ASTM F493
X
X
X
X
X
X
X
X
Table 8 Materials for pipe