Table of Contents
Advertisement
Canadian Installations1
A= Clearance above grade,
12 in (30 cm)
veranda, porch, deck, or
balcony
B= Clearance to window or
6 in (15 cm) for appli-
door that may be open
ances ≤ 10,000 Btuh
(3 kW), 12 in (30 cm)
for appliances > 10,000
Btuh (3 kW) and ≤
100,000 Btuh (30 kW),
36 in (91 cm) for appli-
ances > 100,000 Btuh
(30 kW)
C= Clearance to perma-
nently closed window
12 in (30 cm)
D= Vertical clearance
ventilated soffit located
above the terminal within
24 in (61 cm)
a horizontal distance of 2
feet (61 cm) from the cen-
ter line of the terminal
E= Clearance to unventi-
lated soffit
12 in (30 cm)
F= Clearance to outside
6 in (15 cm)
corner
G= Clearance inside corner
9 in (23 cm)
H= Clearance to each side
3 ft (91 cm) within a
of center line extended
height 15 ft (4.5 m)
above meter/regulator
above the meter/regula-
assembly
tor assembly
ATTENTION: Vinyl Soffit, Vinyl Ceiling, Vinyl Overhang
Disclaimer
Clearances are to heat resistant material (i.e. wood, metal). This
does not include vinyl. Empire Comfort Systems Inc. will not be held
responsible for heat damage caused from terminating under vinyl
overhangs, vinyl ceilings or vinyl ventilated/unventilated soffits.
Page 12
VENT TERMINATION CLEARANCES
US Installations2
12 in (30cm)
6 in (15 cm) for appli-
ances ≤ 10,000 Btuh (3
kW), 9 in (23 cm) for ap-
pliances > 10,000 Btuh
(3 kW) and ≤ 50,000
Btuh (15 kW), 12 in
(30 cm) for appliances >
50,000 Btuh (15 kW)
12 in (30 cm)
24 in (61 cm)
12 in (30 cm)
6 in (15 cm)
9 in (23 cm)
3 ft (91 cm)
I= Clearance to service
regulator vent outlet
J= Clearance to nonme-
chanical air supply
inlet to building or the
combustion air inlet to
any other appliance
K= Clearance to a mechani-
cal air supply inlet
L= Clearance above paved
sidewalk or paved drive-
way located on public
property
M= Clearance under
veranda, porch deck, or
balcony
1
In accordance with the current CSA B149.1, Natural Gas and Propane Instal-
lation Code
2
In Accordance with the current ANSI Z223.1/NFPA 54, National Fuel Gas
Code
†
A vent shall not terminate directly above a sidewalk or paved driveway that is
located between two single family dwellings and serves both dwellings
‡
Permitted only if veranda,, porch, deck, or balcony is fully open on a minimum
of two sides beneath the floor.
*
For clearances not specified in ANSI Z223.1/NFPA 54 or CSA B149.1, one of
the following shall be indicated:
a)
A minimum clearance value determined by testing in accordance with section
2.23.5, or;
b)
A reference to the following footnote: "Clearance in accordance with local
installation codes and the requirements of the gas supplier."
Figure 8
Canadian Installations1
US Installations2
3 ft (91 cm)
6 ft
6 in (15 cm) for appli-
6 in (15 cm) for appli-
ances ≤ 10,000 Btuh (3
ances ≤ 10,000 Btuh
kW), 12 in (30 cm) for
(3 kW), 9 in (23 cm) for
appliances > 10,000
appliances > 10,000 Btuh
Btuh (3 kW) and ≤
(3 kW) and ≤ 50,000 Btuh
100,000 Btuh (30 kW),
(15 kW), 12 in (30 cm) for
36 in (91 cm) for appli-
appliances > 50,000 Btuh
ances > 100,000 Btuh
(15 kW)
(30 kW)
3 ft (91 cm) above if
6 ft (1.83 m)
within 10 ft (3 m) hori-
zontally
7 ft (2.13 m) †
7 ft (2.13 m) †
12 in (30 cm) ‡
12 in (30 cm) ‡
35362-5-0217
Advertisement
Table of Contents
