UTICA BOILERS UCS-380 Installation, Operation & Maintenance Manual page 33

FIGURE 6-27 Flue Termination Location
A
Clearance above grade, veranda, porch, deck, or balcony
B Clearance to window or door that may be opened
C
Clearance to permanently closed window
Vertical Clearance to ventilated soffit located above the terminal within a horizontal distance of 2 feet
D
(610 mm) from the center line of the terminal
E Clearance to unventilated soffit
F
Clearance to outside corner
G Clearance to inside corner
H Clearance to each side of center line extended above meter/ regulator assembly
I Clearance to service regulator vent outlet
J
Clearance to non-mechanical air supply inlet to building or the combustion air inlet to any other
appliance
K Clearance to mechanical air supply inlet
L Clearance above paved sidewalk or paved driveway located on public property
M
Clearance under veranda, porch, deck or balcony
* For clearances not specified in ANSI Z223.1/NFPA 54 or CSA B149.1, clearance will be in accordance with local installation codes and
requirements of gas supplier and these installation instructions.
( )
Vent shall not terminate directly above sidewalk or paved driveway located between two single family dwellings and serves both dwellings.
1
( )
2 Permitted only if veranda, porch, deck or balcony is fully open on a minimum of one side beneath the floor.
Local Codes or Regulations may require different clearances. Flue termination must be exposed to external air and
Note
position must allow free passage of air across it at all times. In certain weather conditions termination may emit a
plume of steam. Avoid positioning termination where this may cause nuisance.
6 - COMBUSTION AIR AND VENT PIPING
Vent Termination Minimum Clearances
33
USA
12" (305mm) 12" (305mm)
12" (305mm) 3 ft. (0.9m)
*12" (305mm) *12" (305mm)
18" (457mm) 18" (457mm)
18" (457mm) 18" (457mm)
9" (229mm) 9" (229mm)
6" (152mm) 6" (152mm)
3 ft. (0.9m) within a 3 ft. (0.9m) within a
height of 15 ft. (4.5m) height of 15 ft. (4.5m)
above the meter/ above the meter/
regulator assembly regulator assembly
3 ft. (0.9m) 3 ft. (0.9m)
12" (305mm)
*3 ft. (0.9m) 6 ft. (1.8m)
*7 ft. (2.1m) 7 ft. (2.1m)
*12" (305mm) 12" (305mm)
2
P/N 240011662, Rev. D [06/30/2017]
CANADA
3 ft (0.9m)
1
2