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CGTH USE AND CARE MANUAL
12
1
In accordance with the current CSA B149.1, Natural Gas and Propane Installation Code
2
In accordance with the current ANSI Z223.1/NFPA 54, National Fuel Gas Code
+
A vent shall not terminate directly above a sidewalk or paved driveway that is located between two single
family dwellings and serves both dwellings.
** Permitted only if veranda, porch, deck, or balcony is fully open on a minimum of two sides beneath the
floor.
* For clearances not specified in ANSI Z223.1/NFPA 54 or CSA B149.1, one of the following shall be
indicated:
a) A minimum clearance value determined by testing in accordance with section 4.7.3, 6.5.5, 8.5.5; or;
b) A reference to the following footnote:
"Clearance in accordance with local installation codes and the requirements of the gas supplier."
H
Clearance to each
side of center line
extended above
meter/regulator
assembly
3' (91 cm) within a height 15' (4.5 m) above
the meter/regulator assembly
*
I
Clearance to
service regulator
vent outlet
3' (91 cm) *
J
Clearance to non-
mechanical air
supply inletto
building or the
combustion air inlet
to any other
appliance
12" (30 cm) 9" (23 cm)
K
Clearance to
mechanical air sup-
ply inlet
6' (1.83 m)
3' (91 cm) above if within 10' (3 m)
horizontally
L
Clearance above
paved sidewalks or
paved driveway
located on private
property
7' (2.13 m)
+
7’ (2.13 m)
+
M
Clearance under
veranda, porch,
deck, or balcony
12' (30 cm)** 12" (30 cm)**