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Technical Training Department
Ashland City, Tennessee
SBN TANK TYPE COMMERCIAL GAS WATER HEATER
SERVICE HANDBOOK
©2003
All SBN water heaters are classified by ANSI as Category I (non-condensing,
negative pressure venting) appliances. They are approved for type B vent. The draft
inducer does not pressurize the exhaust.
Venting
For larger applications, SBN water heaters can be common vented together,
either in a tapered manifold or constant size manifold. Follow the National Fuel Gas
Codes requirements for sizing and installation of fan-assisted products.
SBN Models may be common vented only with other Category I appliances. See the
Venting Section in the National Fuel Gas Code.
Venting – Atmospheric Multiple Heaters