UTICA BOILERS UBSSC-050 Installation, Operation & Maintanance Manual page 22

6 - COMBUSTION AIR AND VENT PIPING
12"
(30.5cm m)
Minimum
Forced Air
Less than
Inlet
10' (3 m)
Minimum
3' (0.9 m)
Minimum
Termination must
be 12" (30.5 cm)
Condensate
from or below doors,
windows or gravity
inlet.
Termination
Termination
3' (0.9 m)
[If located
within 10' (3 m)
of forced air
inlet]
Grade, Snow
22
Combustion air and vent termination
Doors &
must be 12" (300mm) from or below
Windows
doors, windows or gravity inlet.
Vent gas may condense, forming
moisture, may be corrosive. Protect
building materials at vent from exhaust
of vent gas.
Terminate venting system 3' (0.9 m)
Forced Air
above and 10' (3.0 m) from any forced
Inlet
air inlet (except boiler's combustion
air inlet).
Terminate vent system bottom,
minimum 12" (300 mm) above highest
anticipated snow level.
Avoid locations where snow may drift
& Ice
and block vent and combustion air. Ice
or snow may cause boiler to shut down
if vent or combustion air becomes
obstructed.
Vent termination shall NOT be installed
"L"
closer than 3' (0.9 m) from inside
Corner
corner of "L" shaped structure.