UTICA BOILERS UB95M-200 Installation, Operation & Maintenance Manual page 15

Gas-fired direct vent modulating hot water boiler

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Figure 6 -Roof Vent / Intake Terminations

Figure 7 - Concentric Vent Terminations

1" (26mm)

Maximum

Combustion

Air

8 - COMBUSTION AIR AND VENT PIPE

3" MINIMUM

SEPARATION

Vent

1" (26mm)

Maximum

* See Note

Below

Combustion

Air

*Must be less than 4" (102mm) or greater than

24"(610mm) Horizontal distance between end bells of each

air intake to prevent flue gas recirculation.

Roof Overhang

12" (300mm) Minimum

36"(915mm) Minimum

Maintain 12"(300mm)

Vent

clearance above highest

anticipated snow level or

grade

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