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 of the Natural Gas and Propane Installation
Code, CAN/CSA B149.1, or applicable provisions
of the local building codes.
Figure 7 - Type B Gas Vent
11
VENT INSTALLATION
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