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Irving Oil
10004000
Canadian Installations US Installations
A = Clearance above grade, veranda, porch, 12 inches (30cm) 12 inches (30 cm)
deck, or balcony
B =
Clearance to window/door that may be opened
6 in (15cm) for appliances<10,000 Btuh
6 in (15cm) for appliances < 10,000
(3kW), 12 in (30cm) for appliances >
Btuh (3kW), 9 in (23cm) for appliances
10,000 Btuh (3kW) and < 100,000 Btuh > 10,000 Btuh (3kW) and < 50,000
(30kW), 36 in (91cm) for appliances > Btuh (15kW), 12 in (30cm) for appli-
100,000 Btuh (30 kW) ances > 50,000 Btuh (15kW)
C = Clearance to permanently closed window
D = Vertical clearance to ventilated soffit
located above the terminal within a hori- 18” (458 mm) 18” (458 mm)
zontal distance of 2 feet (610mm) from the
center line of the terminal
E = Clearance to unventilated soffit 12” (305 mm) 12” (305 mm)
F = Clearance to outside corner see next page see next page
G = Clearance to inside corner see next page see next page
H = Clearance to each inside of center line
extended above meter/regulator assembly
I = Clearance to service regulator vent outlet 3 feet (91cm) 3 feet (91cm)
J = Clearance to non-mechanical air supply 6 in (15cm) for appliances <10,000 6 in (15cm) for appliances < 10,000
inlet to building or the combustion air inlet Btuh (3kW), 12 in (30cm) for appli-
Btuh (3kW), 9 in (23cm) for appliances
to any other appliance ances > 10,000 Btuh (3kW) and <
> 10,000 Btuh (3kW) and < 50,000 Btuh
100,000 Btuh (30kW), 36 in (91cm) for (15kW), 12 in (30cm) for appliances >
appliances > 100,000 Btuh (30 kW) 50,000 Btuh (15 kW)
K = Clearance to a mechanical air supply inlet 6 feet (1.83m) * 3 feet (91 cm) above if within
10 feet (3 m) horizontally
L = Clearance above paved sidewalk or a 7 feet (2.13m)† 7 feet (2.13m)†
paved driveway located on public property
M = Clearance under veranda, porch, deck 12 inches (30cm) ‡ 12 inches (30cm) ‡
or balcony
N= Clearance above a roof shall extend a minimum of 24” (610mm) above the highest point when it passes through the roof surface,
and any other obstruction within a horizontal distance of 18” (450mm).
1 In accordance with the current CSA-B149 Instalation Codes.
2 In accordance with the current ANSI Z223.1/NFPA 54 National Fuel Gas Codes.
† A vent shall not terminate directly above a sidewalk or paved driveway which is located between two single
family dwellings and serves both dwellings.
‡ Only permitted if veranda, porch, deck, is fully open on a minimum 2 sides beneath the floor.
Note: 1. Local codes or regulations may require different clearances.
2. The special venting system used on Vermont Castings Majestic Products Company’s Direct Vent Fireplaces
are certified as part of the appliance, with clearances tested and approved by the listing agency.
GENERAL VENTING INFORMATION–TERMINATION LOCATION
1
2
3 feet (91cm) within a height of 15
feet above the meter/regulator
assembly
3 feet (91cm) within a height of 15
feet above the meter/regulator
assembly
12 inches (305 mm) recommended to
prevent window condensation
12 inches (305 mm) recommended
to prevent window condensation
V
V
V
V
V
V
V
X
X
X
D
E
B
B
B
C
B
M
B
A
J
K
F
L
VENT TERMINATION AIR SUPPLY INLET
AREA WHERE TERMINAL IS NOT PERMITTED
H
I
Fixed
Closed
Fixed
Closed
Operable
Operable
Fixed
Closed
V
B
INSIDE
CORNER DETAIL
V
A
G
V
N
N
V
V
G
G
A
CFM145a