Sterling MS - Manual (Page 12)

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Figure 11 - Manufacturer’s Recommended Service Clearances
Note: Recommended ceiling clearance 36"
(914mm) is to the top of the furnace venting
collar assembly.
VENTING†
All venting installations shall be in accordance with the
latest edition of Part 7, “Venting of Equipment”, of the
National Fuel Gas Code, ANSI Z223.1 or applicable
provisions of local building codes.
CARBON MONOXIDE! Your venting
system must not be blocked by any snow, snow
drifts or any foreign matter. Inspect your venting
system to ensure adequate ventilation exists at all
times! Failure to heed these warnings could result
in Carbon Monoxide Poisoning (symptoms include
grogginess, lethargy, inappropriate tiredness, or fl u-
like symptoms).
The venting is an integral part of
the unit and must not be altered in the fi eld.
†Refer to the Separated Combustion Indoor Duct
Furnace Manual for more venting requirements.
Ductwork
Field
AIR FLOW
D6573
Inlet
Air
Ductwork
Field
AIR FLOW
Ductwork
Supply Supply
Ductwork
18(457mm)
(635mm)
18(457mm)
5/16
5/16
(8mm)
(8mm)
25
17.5 (444mm)
5/16
(8mm)
(8mm)
5/16
18 (457mm)
(8mm)
5/16
(8mm)
5/16
18 (457mm)
(8mm)
5/16
(8mm)
5/16
36 (914mm)
Vent Systems
Termination Clearance Requirements
Structure/Object
Minimum Clearance
for Termination Locations
USA CANADA
Door, window, or gravity vent
inlet; combustion air inlet for
other appliances 9 inch for 10,000 to
50,000 BTU/Hr
input; 12 inch for
input exceeding
50,000 BTU/Hr. 9 inch (230mm) for
10,000 to 50,000
BTU/Hr input;
12 inch (305mm)
for input exceeding
50,000 BTU/Hr.
Forced air inlet within 10 feet 3 feet above 6 feet (1.8m)
Adjoining Building or parapet 6 feet 6 feet (1.8m)
Adjacent public walkways
7 feet above
grade 7 feet (2.1m) above
grade
Electric, gas meters
& regulators
4 feet horizontal
3 feet (0.9m)
horizontally from
meter/regulator
asembly. 6 feet
(1.8m), any
direction, from
a gas service
regulator vent outlet
Above grade level* 1 foot* 1 foot (0.3m)*
*If the vent terminal is to be installed near ground level, the vent
terminal must be positioned at least six inches (152mm) above the
maximum anticipated snow depth.