21
Figure 11a
– Vent Terminal Clearances (Other than Direct Vent or Powered Direct Vent Installations)
(Power Vent, exhaust only)
Canadian Installations
1
US
Installations
2
Canadian Installations
1
US Installations
2
A=
Clearance above
grade, veranda,
porch, deck or
balcony
12 inches
(30 cm)
12 inches
(30 cm)
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
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 feet (1.2 m)
below or to the
side of opening;
12 inches (30
cm) above
opening
I=
Clearance to service
regulator vent outlet or oil
tank vent
36 inches
(91 cm)
*b
C=
Clearance to
permanently
closed window
*b
*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 (1.2 m)
below or to side of
opening; 12 inches
(30 cm) above
opening.
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
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
E=
Clearance to
unventilated
soffit
*b
*b
L=
Clearance above paved
sidewalk or paved driveway
located on public property
7 feet
(2.13
m) †
7 feet
(2.13
m) †
F=
Clearance to
outside corner
*b
*b
M=
Clearance under a veranda,
porch, deck, or balcony
12 inches
(30 cm) ‡
*b
G=
Clearance to
inside corner
36 inches
(91 cm) *a
36 inches
(91 cm) *a
1
In accordance with the current CAN/CGA-B149
Installation Codes
.
2
In accordance with the current ANSI Z223.1-(Latest Edition)/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 a veranda, porch, deck or balcony is fully open on a minimum of two sides beneath the floor.
*a) A minimum clearance value determined by testing in accordance with section 2.20.
*b) “Clearance in accordance with local installation codes and the requirements of the gas supplier”.
Summary of Contents for LUHE120T
Page 42: ...42 BMS Wiring Diagram...
Page 44: ...44 Lighting and Shutdown Instructions Figure 31 Lighting Instruction Label...
Page 62: ......
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