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VENT PIPE AND TERMINATION CLEARANCES
The final position of your appliance depends on the location of the termination in relation to the clearances that must be observed.
A= 12” (305mm) clearance above grade, veranda, porch, deck
or balcony. ***
B= 9” (229mm) clearance in U.S. and 12” (305mm) clearance
in Canada to window or door that may be closed.
C= 9” (229mm) clearance in U.S. and 12” (305mm) clearance
in Canada to permanently closed window or door that maybe
opened.
D= 18” (475mm) vertical clearance to ventilated and 12”
(305mm) to unventilated soffit located above the terminal
within a horizontal distance of 2 feet (610mm) from the
centerline of the terminal.
E= 12” (305mm) clearance below eaves.
F= 9” (229mm) clearance to outside corner.
G= 6” (15mm) clearance to inside corner.
H= not to be installed above a meter/regulator within 3 feet
(914mm) horizontally from the centerline of the regulator. ***
I= 36” (914mm) clearance in U.S. and 72” (1829mm) in
Canada to service regulator vent outlet. ***
J= 12” (305mm) clearance to non-mechanical air supply inlet
to building or the combustion air inlet to any other
appliance.***
K= 36” (914mm) clearance to a mechanical air supply inlet.
L= 84” (2134mm) clearance above paved sidewalk or paved
driveway located on public property. *
M= 12” (305mm) clearance under veranda, veranda, porch,
deck or balcony. **
* vent shall not terminate directly above a sidewalk or paved driveway that is located between two single-family dwellings and serves
both dwellings.
** only permitted if veranda, porch, deck or balcony is fully open on a minimum of two sides beneath the floor.
*** as specified in CGA-B149 installation codes (1991) for Canada or for U.S. installation follow the current National Gas Code,
ANS Z223.1. Note: Local codes or regulations may require different clearances
.