INS
TALLA
TION
28
On-Demand Water Heater Installation Manual and Owner’s Guide
-Clearances for rooftop terminations-
Follow all local and national codes in regards to proper termination clearances. In the absence of
such codes, the clearances below must be met. Local codes supersede these clearances. Failure to
observe this warning may result in severe personal injury or death.
WARNING
• Exhaust terminations must be at least 1 ft (305 mm) away from any obstructions.
• Minimum spacing between multiple terminals:
• intake terminals: 1 ft (305 mm) spacing between each
• exhaust terminals: 1 ft (305 mm) spacing between each
• The exhaust termination must be a horizontal distance of at least 2 ft (610 mm) from a wall or
surface unless specified differently by local code.
• Failure to observe this warning may result in severe personal injury or death.
WARNING
Multiple flat roof terminations
Canadian requirements differ from the guidelines in this section. In Canada, follow the require-
ments of B149.1 (Natural Gas and Propane Installation Code, current edition) as well as local and
provincial codes. Contact your local code enforcement agency for direction.
NOTICE
Multiple angled roof terminations
INSTALLATION
Step 8:
Clearances
Angled roof termination
Anticipated snow level
2 ft (610 mm) min.
1 ft
(305 mm)
min.
1 ft
(305 mm)
min.
1 ft
(305 mm)
min.
Exhaust
Intake
1 ft
(305 mm)
min.
1 ft
(305 mm)
min.
3 ft
(914 mm)
min.
1 ft
(305 mm)
min.
1 ft
(305 mm)
min.
Anticipated snow level
2 ft
(610 mm)
min.
1 ft
(305 mm)
min.
Exhaust
Exhaust
Intake
Intake
An�cipated snow level
2 �
(610 mm)
min.
3 �
(914 mm)
min.
1 �
(305 mm)
min.
1 �
(305 mm)
min.
Exhaust
Exhaust
Intake
Intake
Flat roof termination
Anticipated snow level
3 ft (914 mm) min.
1 ft
(305 mm)
min.
1 ft
(305 mm)
min.
Exhaust
Intake
Summary of Contents for 160X3P
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