Installation / Operation Instruction Manual

8
Venting
Figure 1 – Direct 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 (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 ft (1.2 m) below or
to side of opening; 1
ft (300 mm) 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
(61 cm) 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 (91 cm) 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
36 inches
(91 cm)
*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)
12 inches
(30 cm)
K=
Clearance to a mechanical air
supply inlet
6 feet
(1.83 m)
3 feet
(91 cm) above if
within 10 feet
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) ‡
12 inches
(30 cm) ‡