Installation / Operation Instruction Manual

8
Venting
Figure 1 - Vent Terminal Clearances
Canadian
Installations
1
US
Installations
2
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
6 in (15 cm) for appliances
≤ 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
appliances >100,000 Btuh (30 kW)
4 ft (1.2 m) below or to side
of opening;
1 ft (30.5 cm) above
opening
C=
Clearance to permanently closed window
*b
*b
D=
Vertical clearance to ventilated soffit
located above the terminal within a
horizontal distance of 2 feet (.6 m) from
the center line of the terminal
*b
*b
E=
Clearance to unventilated soffit
*b
*b
F=
Clearance to outside corner
*b
*b
G=
Clearance to inside corner
*b
*b
H=
Clearance to each side of center line
extended above meter/regulator
assembly
3 feet (.9 m) within a height 15 feet
(4.6 m) above the meter/regulator
assembly
*b
I=
Clearance to service regulator vent outlet
or oil tank vent
3 feet
(.9 m)
*b
J=
Clearance to non-mechanical air supply
inlet to building or the combustion air
inlet to any other appliance
6 in (15cm) for appliances ≤10,000
Btuh (3kW); 12 in (30 cm) for
appliances >10,000 Btuh (3kW)
and ≤100,000 Btuh (30kW); 36 in
(91 cm) for appliances >100,000
Btuh (30 kW)
4 feet (1.2m) below or to
side of opening;
12 inches (30 cm) above
opening.
K=
Clearance to a mechanical air supply
inlet
6 feet
(1.83 m)
3 feet (91 cm) above if
within 10 feet (3.1 m)
horizontally
L=
Clearance above paved sidewalk or
paved driveway located on public
property
7 feet
(2.13 m) †
7 feet
(2.13 m) †
M=
Clearance under a veranda, porch, deck,
or balcony
12 inches
(30 cm) ‡
*b