- Instruction Manual Residential Gas Water Heater

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8. Operateheaterthrough1heatcycletoensurecombustion-airand
ventpipesareproperlyconnectedtoconcentricventtermination
connections.
FIGURE G.
MULTI-CONCENTRIC VENT TERMINATIONS
Whentwoormoreappliancesaredirectedventedwithconcentric
vent terminations near each other, each appliance must be
individuallyvented.NEVERcommonventthisappliance.When
two or more appliances are direct vented using concentric vent
terminations,theappliances may be vented asshowninFigureH
andFigureI.
Figure H.
Concentric Vent Terminations
forHorizontalDirectVenting.
Figure I.
Concentric Vent Terminations for Vertical
DirectVentingthrougharoof.