Outdoor Venting - Navien NR-180 Installation Manual

Gas Water Heater Installation
█ Venting: Outdoor Installation
Contaminated Combustible Air Will Damage the Unit
 Follow all local codes, or in the absence of local codes, follow the most recent edition of
The National Fuel Gas Code: ANSI Z223.1/NFPA 54 in the USA or CAN/CSA B149.1 Natural
Gas, Propane Installation Code in Canada.
 Outdoor installation only for a mild climate.

Outdoor Venting

 For Outdoor Venting, Intake air pipe should not be next to Exhaust pipe. That will prevent
exhaust flue gas from entering the intake air pipe. Make sure there are plenty of air around the
intake air pipe and protect any objects from entering the intake air pipe.
Intake Air
Min. 12"
< Clearance >
Venting Clearance

When Navien Water Heater is installed outdoor, water heater installed location should be in open
unroofed area with following clearance table below.
34
Top
Min. 36"
Min. 12"
Min. 12"
Vent Terminator
Exhaust Flue Gas
Min. 12"
Bottom
Bottom of water heater
Back of water heater
Side of water heater
Front of water heater
Top of water heater
Elbow
Pipe
Coupling
Vent Terminator
<Venting Disassemble>
Min. 12"
Min. 0.5"
Min. 3"
Min. 24"
Min. 36"