Eternal Hybrid Water Heater is a gas burning appliance with fan-assisted exhaust. The appliance must be vented
with 2" or 3" Category IV special venting, which is air tight to prevent leakage of exhaust gases.
The appliance must be vented separately from all other appliances. The following type of non-metallic vent can be
used:
Vent Pipe Material
All primers, cleaners and cements must meet all local codes and applicable standards of the American Society for
Testing Materials (ASTM).
Cementing PVC, ABS or CPVC PIPE and FITTING
The following guidelines should be followed when installing the exhaust outlet piping:
Venting should be as direct as possible with a minimum number of pipe fittings.
Venting diameter must not be reduced unless specially noted in the installation instructions.
Support all horizontal pipe runs every 3½ feet according to local codes.
Vents running through unconditioned spaces where below freezing temperatures are expected should be
properly insulated to prevent freezing. For horizontal runs, wrap the vent pipe with self-regulating 3 or 5 watt
heat tape. The heat tape must be U.L. listed and installed per manufacturer's instructions.
Do not connect this venting system with an existing vent or chimney.
Do not connect common vent with the vent pipe of any other water heater or appliance.
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NOTICE-VENTING GUIDELINES
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This water heater must be properly vented for removal of exhaust gases to the outside of the home. Correct
installation of the vent pipe system is mandatory for the safe and efficient operation of this water heater and is an
important factor in the life of the unit.
WARNING
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If the Eternal combustion air inlet is located in an area likely to cause or contain contamination, the combustion
air must be repiped and terminated at another location. Contaminated combustion air will damage the unit and its
burner system, resulting in possible severe personal injury, death or substantial property damage.
WARNING
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For installations in Canada, field supplied plastic vent piping must comply with CAN/CGA-B149.1(latest edition)
and be certified to the Standard For Type BH Gas Venting Systems,ULC S636 Components of this listed system
shall not be interchanged with other vent systems or unlisted pipe/fittings. All plastic components and specified
primers and glues of the certified vent system must be from a single system manufacturer and not intermixed
with other system manfacturer's vent system parts.
The supplied vent connectors are certified as part of the water heater.
WARNING
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Venting Intake & Exhaust Material
PVC (schedule 40, ASTM-D1785) CPVC (schedule 40, ASTM-D2846)
PVC-DWV (ANSI/ASTM-D2665) ABS (schedule 40, ASTM-D2661)
PP Pipe Single wall & Components (ULC-S636)
Note : Do not use cellular foam core pipe.
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