UTICA BOILERS UHSW Series Installation, Operation & Maintenance Manual page 15

Figure 9 - Horizontal Venting Clearances
D. The venting system shall terminate at least 3 feet
(0.9m) above any forced air inlet located within
10 feet (3m). The venting system shall terminate
at least 4 feet (1.2m) below, 4 feet (1.2m)
horizontally from, or 1 foot (300 mm) above any
door, window, or gravity air inlet into any building.
The bottom of the vent shall be located at least 12
inches (300mm) above grade. Termination of the
vent shall be not less than 7 feet (2.13m) above
adjacent public walkway. The vent terminal shall
not be installed closer than 3 feet (0.9m) from the
inside corner of an L shaped structure. Termination
of the vent should be kept at least 3 feet (0.9m)
away from vegetation. The venting system shall
terminate at least 4 feet horizontally from, and in
no case above or below, unless a 4 foot horizontal
distance is maintained, from electric meters, gas
meters, regulators, and relief equipment. See
Figure 9.
United States - Terminate vent system at least
4 feet (1.22m) horizontally from, and in no
case above or below, unless a 4 feet (1.22m)
horizontal distance is maintained, from electric
meters, gas meters, regulators and relief
equipment.
HORIZONTAL VENTING INSTRUCTIONS
15
A. The venting system shall terminate at least 4 feet
below any eave, soffit, or roof overhang.
B. The venting system shall not terminate underneath
any deck, patio, or similar structure.
C. Put vent on a wall away from the prevailing
winter wind. Locate or guard the vent to prevent
accidental contact with people or pets.
D. Terminate the vent above normal snow-line. Avoid
locations where snow may drift and block the vent.
Ice or snow may cause the boiler to shut down if
the vent becomes obstructed.
E. Under certain conditions, flue gas will condense,
forming moisture. In such cases, steps should be
taken to prevent building materials at the vent
terminal from being damaged by exhaust of flue
gas.
PN 240012689 Rev. A [05/15/2019]