Navien NHB H Series Installation And Operation Manual page 13

Adequate Venting and Ventilation
Select a location that requires minimal venting.
Consider venting restrictions caused by windows,
doors, air intakes, gas meters, foliage, and other
buildings. For more information about venting, refer
to "5. Venting for Combustion Air" on page 52.
To ensure adequate venting and ventilation, follow
these guidelines:
Maintain proper clearances from any openings in
●
the building.
Ensure that the vent termination is at least 12 in
●
(300 mm) above ground, 12 in (300 mm) above
the highest anticipated snow level, or as required
by local codes, whichever is greater.
Do not enclose the vent termination.
●
Install the exhaust vent in an area that is free
●
from any obstructions, where the exhaust will not
accumulate.
Avoid Installations of the boiler where moisture
●
from the exhaust may discolor or damage walls.
Do not install the boiler in bathrooms, bedrooms,
●
or any other occupied rooms that are normally
kept closed or not adequately ventilated.
Install a carbon monoxide detector in the
●
dwelling area nearby the appliance. Refer
to manufacturer's instructions as well as the
Consumer Product Safety Commission (CPSC)
and Environmental Protection Agency (EPA)
recommendations for proper use of carbon
monoxide alarms.
Adequate Installation Clearances
NOTICE
Do not install the boiler on carpeting.
Install the boiler in an area that allows for service
and maintenance access to utility connections,
piping, filters, and traps. Based on the installation
location, ensure that the following clearances are
maintained:
Top
Back
Side
Clearance from: Indoor Installation
Top 9 in (229 mm) minimum
Back 0.5 in (13 mm) minimum
Front 4 in (100 mm) minimum
Sides 3 in (76 mm) minimum
Bottom 12 in (300 mm) minimum
Side
Front
Bottom
Installing the Boiler 13