Louisville Tin and Stove HEDV403 - Manual (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 Clearance in accordance with
local installation codes and the
requirements of the gas supplier
I = Clearance to service regulator
vent outlet 3 Feet (91 cm) Clearance 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.
Clearance 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. Clearance 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 CLEARANCES
Page 4
Vent Terminal Air Supply Inlet Area where terminal is not permitted