Louisville Tin and Stove HEDV254A - Manual (Page 4)

VENT TERMINAL CLEARANCES
Page 4
REFERENCE LETTER TO
DRAWING
CANADIAN
INSTALLATIONS¹
U.S. INSTALLATIONS²
A = Clearance above grade,
veranda, porch, deck, or
balcony
12 Inches (30 cm) 12 Inches (30 cm)
B = Clearance to window or door
that may be opened 12 Inches (30 cm) 9 Inches (23 cm)
C = Clearance to permanently
closed window 12 Inches (30 cm) 9 Inches (23 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) 18 Inches (46 cm)
E = Clearance to unventilated
soffit 18 Inches (46 cm) 18 Inches (46 cm)
F = Clearance to outside corner 12 Inches (30 cm) 12 Inches (30 cm)
G = Clearance to inside corner 12 Inches (30 cm) 12 Inches (30 cm)
H = Clearance to each side of
center line extended above
meter/ regulator assembly
3 Feet (91 cm) within a height
15 Feet (4.5m) above the
meter/regulator assembly
Clearances are in accordance
with local installation codes and
the requirements of the gas
supplier
I = Clearance to service regulator
vent outlet 3 Feet (91 cm) Clearances are in accordance
with local installation codes and
the requirements of the gas
supplier
J = Clearance to nonmechanical
air supply inlet to building or the
combustion air inlet to any other
appliance
12 Inches (30 cm) 12 Inches (30 cm)
K = Clearance to a mechanical
air supply inlet
6 Feet (1.83 m) 3 Feet (91 cm) above if within
10 Feet (3 m) horizontally
L = Clearance above paved
sidewalk or paved driveway
located on public property
7 Feet (2.13m) A vent shall
not terminate directly above
a sidewalk or paved driveway
that is located between two
single family dwellings and
serves both dwellings.
Clearances are in accordance
with local installation codes and
the requirements of the gas
supplier.
M = Clearance under veranda,
porch, deck, or balcony 12 Inches (30 cm) permitted
only if veranda, porch, deck,
or balcony is fully open on a
minimum of two sides.
Clearances are in accordance
with local installation codes and
the requirements of the gas
supplier.
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
Vent Terminal Air Supply Inlet Area where terminal is not permitted
FIGURE 1