Canadian Installations
US Installations
A = Clearance above grade, veranda,
12 in (30 cm)
12 in (30 cm)
porch, deck, or balcony
B = Clearance to window or door that
6 in (15 cm) for appliances 10,000
4 ft (121 cm) below or to side of
may be opened
Btuh (3 kW), 12 in (30 cm) for
opening; 1 ft (30 cm) above opening
appliances > 10,000 Btuh (3 kW) and
100,000 Btuh (30 kW), 36 in (91 cm)
for appliances > 100,000 Btuh (30 kW)
C = Clearance to permanently closed
*
*
window
D = Vertical clearance to ventilated soffit
*
*
located above the terminal within
a horizontal distance of 2 ft(61 cm)
from the center line of the terminal
E = Clearance to unventilated soffit
*
*
F
= Clearance to outside corner
*
*
G = Clearance to inside corner
*
*
H = Clearance to each side of center
3 ft (91 cm) within a height 15 ft
*
line extended above
( 458 cm) above the meter / regulator
meter/regulator assembly
assembly
I
= Clearance to service regulator
3 ft (91 cm)
*
vent outlet
J
= Clearance to nonmechanical air
6 in (15 cm) for appliances 10,000 Btuh 4 ft (121 cm) below or to side of
supply inlet to building or the
(3 kW),12 in (30 cm) for appliances >
opening; 1 ft (30 cm) above
combustion air inlet to any other
10,000 Btuh (3 kW) and 100,000 Btuh
opening
appliance
(30 kW), 36 in (91 cm) for appliances
> 100,000 Btuh (30 kW)
K = Clearance to a mechanical air supply
6 ft (183 cm)
3 ft (91 cm) above if within 10 ft
inlet
(305 cm) horizontally
L
= Clearance above paved sidewalk or
7 ft (213 cm) **
7 ft (213 cm)
paved driveway located on public
property
M = Clearance under veranda, porch
12 in (30 cm) ***
*
deck. or balcony
*
**
***
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.
"Clearance in accordance with local installation codes and the requirements of the gas supplier and the manufacturer's
installation instructions."
A vent shall not terminate directly above a sidewalk or paveble Cell Footnoted driveway that is located between two single
For clearances not specified in ANSI Z223.1/NFPA 54 or CSA B1 49.1, the following statement shall be included:
232
Other Then Direct Vent Terminal Clearances
23
Summary of Contents for FV95A054
Page 42: ......
