11
INSTALLING THE EXHAUST PIPE
WARNING! There is water contained in the coils of your water heater at all times. If
your water heater is exposed to freezing temperatures, the water in the coils could
freeze, causing a break in the heat exchanger of the unit.
This kind of damage will result in water running freely into the space where the
water heater is located, with can cause flooding. If your water heater is installed in a
geographic 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 residence 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
building 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
heating 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 this Natural Rise Gas
Series model are as follow: subject to local building codes.
- 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 properly
vent the gases and moisture from combustion. A straight vertical run is preferable.
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