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Rinnai Tankless Water Heater Installation and Operation Manual 20
4.3.3 Internal (Indoor) Water
Heaters
• Install the water heater as far away as
possible from any air inlet vents. Corro-
sive fumes, sometimes found in hair/ nail
salons, spas, or other industries exposed
to toxic fumes, may be released through
these vents when not in operation. Chemi-
cals that are corrosive in nature should not
be stored or used near the water heater or
vent termination. This requirement applies
to internal (indoor) and external (outdoor)
water heater.
• In coastal regions, the water heater should
be installed so that it is sheltered/protected
from exposure to sea breeze. Exposure to
salty spray or breeze can cause corrosion
of the water heater.
• DO NOT install the water heater in areas
where combustion air might be contami-
nated with chemicals.
• DO NOT use room air in applications
where the indoor air is corrosive. Install
the water heater as direct vent in a sealed
closet so that it is protected from the po-
tential of contaminated indoor air.
• Install the water heater as far away as
possible from any air inlet vents. Corro-
sive fumes, sometimes found in hair/ nail
salons, spas, or other industries exposed
to toxic fumes, may be released through
these vents when not in operation. Chemi-
cals that are corrosive in nature should not
be stored or used near the water heater or
vent termination. This requirement applies
to internal (indoor) and external (outdoor)
water heaters.
4.3.4 External Water Heaters
and Vent Terminations
• Install the water heater as far away as
possible from exhaust vent hoods and
dryer vents.
• In coastal regions, the water heater should
be installed so that it is sheltered/protected
from exposure to sea breeze. Exposure to
salty spray or breeze can cause corrosion
of the water heater.
• Damage and repair due to corrosive
compounds in the air is not covered by
warranty.
• Install the water heater as far away as
possible from any air inlet vents. Corro-
sive fumes, sometimes found in hair/ nail
salons, spas, or other industries exposed
to toxic fumes, may be released through
these vents when not in operation. Chemi-
cals that are corrosive in nature should not
be stored or used near the water heater or
vent termination. This requirement applies
to internal (indoor) and external (outdoor)
water heaters.
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