How to Guide

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This kind of damage will result in water running freely into the space where the water
heater is located, with can cause ooding. If your water heater is installed in a geo-
graphic location that sees very low sustained temperatures, you MUST terminate vent
stack with a properly rated wind and rain cap. This will help prevent cold air from falling
down into the water heater and causing freeze damage. Damage to the unit or resi-
dence caused by freezing is not covered under warranty and responsibility for this type
of damage is disclaimed by Marey Heater Corporation.
- All venting must be done in accordance with local codes and regulations. Local build-
ing codes from city to city and state to state will vary. Some jurisdictions may allow
venting material not allowed by other jurisdictions.
- ALL jurisdictions in North America allow for Z-Vent material to be used for venting
tankless hot water heaters. The condensation of a tankless water heater is slightly more
acidic than that of a standard water heater. Z-Vent is double walled stainless steel vent
pipe made specically for venting tankless heaters. Z-Vent is intended for lifetime use
and will never corrode or rust.
- MOST jurisdictions in North America allow for B-Vent to be used for category 1 heat-
ing appliances. Round B Vent is ideal for Category 1 draft hood appliances. It uses a
double wall construction with the inner ue of polished aluminum or aluminum alloy
and an outer casing of galvanized steel. If venting is done correctly then the exhaust
gasses should be carried out before it has a chance to condensate. Before deciding
what material to use, you MUST check your local building codes to see what is allowed
in your jurisdiction. If you choose to use B-Vent, you MUST check it at least monthly for
corrosion and replace vent pipes immediately if corrosion is detected.
The proper venting Materials and procedure for the venting of the Natural Rise Power
Gas Series are as followed.
- The preferred material for these heaters is B-Vent {doubled walled, galvanized metal
outside, polished aluminum inside). The unit requires 4" venting.
- You must establish an 18" collar rise before installing any bends or condensation
catches. Never install a 90 degree bend directly on top of the heater.
-The minimum height allowed is 6 feet, this is to allow enough pipe to heat up to prop-
erly vent the gases and moisture from combustion. A straight vertical run is preferable.