Terminating The Vent - Navien NHB-055 Installation & Operation Manual

5.4 Terminating the Vent

Before installing the boiler, determine what type of vent
termination is appropriate for the installation location and
situation. Examples in this section describe typical venting
configurations, but they do not include all possible options.
The following PP components can be used as terminations:
Duravent
2PPS-E90L (2" 90° Elbow)
3PPS-E90L (3" 90° Elbow)
2PPS-E45L (2" 45° Elbow)
3PPS-E45L (3" 45° Elbow)
2PPS-TL (2" Tee)
3PPS-TL (3" Tee)
2PPS-BG (2" Birdscreen)
3PPS-BG (3" Birdscreen)
Centrotherm
ISELL0287 (2" 87° Elbow)
ISELL0387 or ISEL0387 (3" 87° Elbow)
ISELL0245 (2" 45° Elbow)
ISELL0345 or ISEL0345 (3" 45° Elbow)
IST02 (2" Tee)
IST03 (3" Tee)
IASPP02 (2" Birdscreen)
IASPP03 (3" Birdscreen)
Along with 2 in and 3 in PVC concentric terminations shown on
page 46, the following terminations can also be used:
IPEX Low Profile Termination Kits
2 in Low Profile Vent Kit #196984
3 in Low Profile Vent Kit #193985
Duravent PolyPro Horizontal Concentric Termination Kit
2 in x 4 in Concentric Vent Kit #2PPS-HKL
3 in x 5 in Concentric Vent Kit #3PPS-HKL
Refer to the vent manufacturer's instructions for detailed
installation procedures.
CAUTION
Minimum Clearance to Metering devices and Relief
equipment. Maintain a minimum horizontal clearance of
4 ft (1.22 m) from electric meters, gas meters, regulators, and
relief equipment. Do not install the boiler above or below
electric meters, gas meters, regulators, or relief equipment
unless a 4 ft (1.22 m) horizontal clearance is maintained.
Refer to the figure below for the orientation of vent
termination if the IPEX low profile vent kit is used for
termination.
46 Venting the Boiler
Indoor Boiler Installation Venting Examples
The following are some possible indoor venting options:
2 in or 3 in Two-pipe Sidewall Venting
Interior View
Do not vertically
stack terminations on
sidewalls.
Exterior View
Intake Air
Exhaust Gas
i n .
m ) m
0 0 m
1 2 " ( 3
Exhaust Gas
Intake Air