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IV. Venting B. CPVC/PVC Venting (continued)
Extend vent/combustion air piping to maintain minimum vertical (‘X’) and minimum horizontal (‘Y’) distance
of 12 in. (300 mm) [18 in. (460 mm) Canada] from roof surface. Allow additional vertical (‘X’) distance for
expected snow accumulation.
Figure 9: Field Installation of CPVC/PVC Two-Pipe Vent Connector with Factory Installed
Flue Temperature Sensor and Sensor Cap - Floor Mounted Boiler Builds
Figure 10A: Near-Boiler Vent/Combustion Air Piping - Floor Mounted Boiler Builds
Figure 8: Direct Vent - Vent and Air Intake Vertical Terminations with Sloped Roof
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