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Posted: Wednesday, August 30, 2017 5:55 AM

Selecting the correct vent type: Stainless or galvanized Tankless Water Heater?

The condensation of a tankless water heater is slightly more acidic and thus corrosive than a standard water heater's condensation.
That is why many building codes in North America require Type III stainless steel, such as Z-Vent shown in the Related Gadgets section below, for venting natural gas and propane tankless hot water heaters. It will never corrode or rust.

Alternatively, some building codes in North America allow for B-vent to be used. B-vent is double walled galvanized vent pipe made for standard water heaters and stove vent pipe.
Unfortunately, the less expensive B-vent material will eventually corrode. If you are considering B-vent pipe you must check your local building codes to see if it is allowed. If you do an installation with B-Vent, you must inspect the pipe at least once per month for corrosion, and immediately replace any corroding ones. It's likely that the B-vent pipe will be corroded within 5 years.




• Location: San Francisco

• Post ID: 79463903 sf

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