58 Venting the Boiler
●
Flexible Vent Systems (Polypropylene)
Note
●
Only VERTICAL installations are allowed. Horizontal
terminations are prohibited.
●
The use of proper adapters and supports are required
to fully complete the installation.
The following table lists the flexible vent models that are approved
for use with this appliance in addition to the maximum allowable
vent lengths for the desired vent system.
Model Type Vent Dia.
Flexible PP
Centrotherm Innoflue Flex
NFB-175/200 2 in 50 ft
●
Only the flexible vent models listed above are approved for use
with this appliance.
●
All flexible vent pipe must be installed VERTICALLY through the
roof. No horizontal terminations are permitted.
●
Use a 2 in snap fit coupler or the InnoFlue® Single Wall
Residential vent pipes to connect the InnoFlue® Flex 2 in vent
pipes to the exhaust.
●
After installation, ensure that the vent system is tighltly sealed at
the joints.
●
All installation using the flexible vent materials must be in
INDIRECT VENTING only.
●
Refer to the manufacturer’s literature for detailed information
and guidelines.
Note
For cascade applications, the required horizontal
clearance between terminations is 12” for both sidewall
and vertical venting installations.
Do not vertically stack
concentric terminations on
sidewalls.
Indoor Boiler Installation Venting Examples (continued)
●
Low Profile Two-Pipe Sidewall Venting*
Exhaust
(from
appliance)
Intake Air
(from
outdoors)
12” (300 mm) min.**
Exterior View
* IPEX and Centrotherm Low Profile terminations only
** Clearance above highest anticipated snow level or grade, or as
required by local codes, whichever is greater
Note
Only the following orientations are allowed for twin
pipe terminations.
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