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The following polypropylene vent components are
approved for use with this appliance:
Duravent PolyPro® SW (Rigid) (Certified to ULCS636)
2PPS-xxx (2") or 3PPS-xxx (3")
Centrotherm Innoflue® SW (Rigid) (Certified to
UL1738 and ULCS636)
ISxx02xx (2") or ISxx03xx (3")
Duravent PolyPro® (Flexible) (Certified to ULCS636)
3PPS -FLEXxx (3")
2PPS-FAM or 3PPS-FAM (2" or 3" Rigid-to-Flex Male
Adapter)
2PPS-X3L (2" to 3" Increaser)
Centrotherm Innoflue® (Flexible) (Certified to
UL1738 and ULCS636)
IFVL02xxx (2") or IFVL03x xx (3")
IFSFC02 or IFSFC03 (2" or 3" Rigid-to- Flex Male Adapter)
ISEI0203 or ISIA0203 (2" t o 3" Increaser)
Hart & Cooley Polyflue™ SW (Rigid) (Certified to
ULCS636)
2PF-xx (2") or 3PF-xx (3")
Z-Flex Z-DENS SW (Rigid) (Certified to UL1738 and
ULCS636)
2ZDP___ (2" or 3")
The following stainless steel vent components are
approved for use with this appliance:
Duravent FasNSeal® (Rigid) (Certified to UL1738
and ULCS636)
FSA-PVC3 (3" PVC to FasN Seal Appliance Adapter)
FSxxxxx03 (3")
Duravent FasNSeal® (Flexible) (Certified to UL1738
and ULCS636)
FSASMM-PP-2 (2" PP-to-F asNSeal adapter)
FSFLEX-02 (2")
Heat Fab Saf-T Vent® EZ Seal (Certified to UL1738
and ULCS636)
9301PVC (3" PVC/CPVC Outlet Boiler Adapter)
93xx (3")
Z-Flex Z Vent (Certified to UL1738 and ULCS636)
2SVSTTA023 (2" x 3" Appliance Adapter)
2SVEPSCF030X (Straight Pipe)
2SVEEWCF0390 (90° Elbow)
2SVEEWCF0345 (45° Elbow)
ECCO Polypropylene Vent (Rigid) (Certified to ULCS 636)
2xxPPP (2") or 3xxPPP (3")
245PEL/287PEL (2" 45°/90° Elbow)
345PEL/387PEL (3" 45°/90° Elbow)
203PINC (2" x 3" Increaser)
Only the vent pipe models listed
Note
●
above are approved for use with this
appliance.
Refer to the vent manufacturer's
●
instructions for detailed installation
procedures and guidelines.
Do not use Schedule 40 or 80
●
polypropylene pipe used for water or
waste systems within the vent run.
62
Venting for Combustion Air
5.5 Measuring Vent Length
The maximum vent length when using 2 in exhaust
ducts is 65 ft (19.5 m). The maximum vent length
when using 3 in vent ducts is 150 ft (45 m). The
intake and exhaust vent pipes can be of different
lengths as the boiler will adjust for pressure
imbalances within the system. Maximum vent
lengths are reduced according to the number of
elbows used, as shown in the following table:
Maximum
Vent
Maximum
# of 90°
Size
Length
Elbows
65 ft
2 in
6
(19.5 m)
150 ft
3 in
8
(45 m)
The Maximum Length does not
Note
●
include any elbows.
The use of a PVC or polypropylene
●
termination kit counts as 5 linear feet
(1.5 m) of vent.
The use of a tee counts for the same
●
equivalent length as a 90° elbow for
the vent size.
The maximum vent lengths at high
●
altitudes are the same as shown in the
table above.
Equivalent Length
Reduce the
maximum vent
length accordingly
for each elbow used:
Each 90° elbow
●
equates to 8 linear
feet of vent
Each 45° elbow
●
equates to 4 linear
feet of vent
Reduce the
maximum vent
length accordingly
for each elbow used:
Each 90° elbow
●
equates to 5 linear
feet of vent
Each 45° elbow
●
equates to 3 linear
feet of vent
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