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F F u u r r n n a a c c e e G G e e n n e e r r a a l l I I n n s s t t a a l l l l a a t t i i o o n n
Direct Vent Termination Clearances
Clearance above grade, veranda, porch,
A=
deck, or balcony
Clearance to window or door that may be
B=
opened
Clearance to permanently closed window
C=
Vertical clearance to ventilated soffit
located above the terminal within a
D=
horizontal distance of 2 feet (61 cm) from
the center line of the terminal
E=
Clearance to unventilated soffit
F=
Clearance to outside corner
G=
Clearance to inside corner
Clearance to each side of center line
extended above meter/regulator
H=
assembly
Clearance to service regulator vent outlet
I=
Clearance to nonmechanical air supply
inlet to building or the combustion air
J=
inlet to any other appliance
Clearance to a mechanical air supply inlet
K=
Clearance above a paved sidewalk or
paved driveway located on public
L=
property
Clearance under veranda, porch, deck, or
M=
balcony
Notes:
1.
The Canadian venting installations must be in accordance with local codes or in the absence of local codes with the current CSA B149.1
Natural Gas and Propane Installation Code.
2.
The US venting installations must be in accordance with local codes or in the absence of local codes with the current ANSI Z223.1/NFPA 54
National Fuel Gas Code.
* Clearance in accordance with local installation codes and the requirements of the gas supplier.
50
Canadian Installations
12 inches (30 cm)
12 inches (30 cm) for appliances >
10,000 BTUH (3 kw) and ≤ 100,000
BTUH (30 kw), 36 inches (91 cm) for
appliances > 100,000 BTUH (30 kw)
*
*
*
*
*
3 feet (91 cm) with a height 15 feet (4.5
m) above the meter/regulator assembly
3 feet (91 cm)
12 inches (30 cm) for appliances >
10,000 BTUH (3 kw) and =/< 100,000
BTUH (30 kw), 36 inches (91 cm) for
appliances > 100,000 BTUH (30 kw)
6 feet (1.83m)
7 feet (2.13 m) and not located above
public walkways or other areas where
condensate or vapor can cause a
nuisance or hazard
12 inches (30 cm) if veranda, porch,
deck, or balcony is fully open on a
minimum of two sides beneath the floor
US Installations
12 inches (30 cm)
9 inches (23 cm) for appliances > 10,000
BTUH (3 kw) and =/< 50,000 BTUH (15
kw), 12 inches (30 cm) for appliances >
50,000 BTUH (15 kw)
*
*
*
*
*
*
*
9 inches (23 cm) for appliances > 10,000
BTUH (3 kw) and ≤ 50,000 BTUH (15 kw);
12 inches (30 cm) for appliances >
50,000 BTUH (15 kw)
3 feet (91 cm) above if within 10 feet
(3m) horizontally
7 feet (2.13 m) and not located above
public walkways or other areas where
condensate or vapor can cause a nuisance
or hazard
12 inches (30 cm) where the area
beneath the veranda, porch, deck, or
balcony is open on not less than two
sides. The vent terminal is prohibited in
this location where only one side is open
A952V-SVX001-1B-EN
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