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Vertical Venting, Direct Vent Concentric termination
This water heater may be vented vertically (through a roof) with a concentric vent
termination kit. One hole through the roof is required for the concentric vent.
Both combustion air intake and vent pipes must be attached to the concentric vent
termination.
All clearances must comply with local codes or the latest edition of NFPA 54/ANSI Z223.1
or CSA B149. As a basic guide, the following minimum clearances shall be used (see Figure
14 for additional information):
• Minimum 12 inches (30 cm) above roof.
• Minimum 12 inches (30 cm) above anticipated snow level.
• Maximum 24 inches (61 cm) above roof level without additional support for vent.
• 4 feet (1.2 m) from any gable, dormer or other roof structure with building interior
access (e.g. vent or window).
• 10 feet (3 m) from any forced air inlet to the building. Any fresh or make-up air inlet
such as a dryer or furnace area is considered to be a forced air inlet.
Cut a 5 in. diameter hole through the roof. Make sure the wye concentric fitting is
cemented to the large diameter pipe and that the rain cap is cemented to the small
diameter pipe. Install the wye concentric fitting and large pipe assembly through the 5 in.
diameter hole in the roof and field supplied roof boot/flashing. See Figure 15 for installa-
tion details.
SECTION IV: INSTALLATION (cont .)
VENT & COMBUSTION AIR INTAKE (cont.)
Figure 14: Concentric Vent Roof Clearances
