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Gas Water Heater Installation
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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.
< Clearance > <Venting Disassemble>
Venting Clearance
When Navien Water Heater is installed outdoor, water heater installed location should be in open
unroofed area with following clearance table below.
Bottom of water heater
Min. 12
”
Back of water heater
Min. 0.5”
Side of water heater
Min. 3
”
Front of water heater
Min. 24”
Top of water heater
Min. 36”
VENTING
Min. 12
”
Min. 12
”
Min. 12
”
Intake Air
Exhaust Flue Gas
Vent Terminator
Coupling
Elbow
Pipe
Vent Terminator
Min. 36
”
Min. 12
”
Top
Bottom