ECR International Pennco FSB II Series Installation, Operation & Maintenance Manual page 11

VENT INSTALLATION
Figure 7 - Type B Gas Vent
CHECK YOUR CHIMNEY
For boilers for connection to gas vents or
chimneys, vent installations shall be in
accordance with "Venting of Equipment", of the
National Fuel Gas Code, ANSI Z223.1/NFPA 54,
or applicable provisions of the local building
codes.
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