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REFERENCE LETTER TO
DRAWING
CANADIAN
INSTALLATIONS¹
A
= Clearance above grade,
veranda, porch, deck, or
balcony
12 Inches (30 cm)
B
= Clearance to window or door
that may be opened
12 Inches (30 cm)
C
= Clearance to permanently
closed window
12 Inches (30 cm)
D
= Vertical clearance to
ventilated soffit located above
the terminal within a horizontal
distance of 2 Feet (61 cm) from
the center line of the terminal
18 Inches (46 cm)
E
= Clearance to unventilated
soffit
18 Inches (46 cm)
F
= Clearance to outside corner 12 Inches (30 cm)
G
= Clearance to inside corner 12 Inches (30 cm)
H
= Clearance to each side of
center line extended above
meter/ regulator assembly
3 Feet (91 cm) within a he
i
15 Feet (4.5m) above the
meter/regulator assembly
I
= Clearance to service regulator
vent outlet
3 Feet (91 cm)
J
= Clearance to nonmechanical
air supply inlet to building or the
combustion air inlet to any other
appliance
12 Inches (30 cm)
K
= Clearance to a mechanical
air supply inlet
6 Feet (1.83 m)
L
= Clearance above paved
sidewalk or paved driveway
located on public property
7 Feet (2.13m) A vent shal
not terminate directly ab
o
a sidewalk or paved drive
w
t
h
ti l t db t t
VENT TERMINAL CLEARANCES
Page 4
Vent Terminal
Air Supply Inlet Area where terminal is not permitted