Lennox ELITE Series Installation Instructions Manual page 23

FOR NON−DIRECT VENT INSTALLATIONS IN THE USA AND CANADA
D
E
B
L
A = Clearance above grade, veranda,
B =
C =
D = Vertical clearance to ventilated soffit
located above the terminal within a
horizontal distance of 2 feet (mm)
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 line ex-
tended above meter / regulator assembly
I = Clearance to service regulator
J = Clearance to non−mechanical air
supply inlet to building or the com-
bustion air inlet to any other ap-
K = Clearance to mechanical air sup-
L = Clearance above paved sidewalk or
paved driveway located on public property
M = Clearance under veranda, porch,
1
In accordance with the current ANSI Z223.1/NFPA 54 Natural Fuel Gas Code
2
In accordance with the current CSA B149.1, Natural Gas and Propane Installation 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. Lennox recommends avoiding this location if possible.
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VENT TERMINATION CLEARANCES
C
F
B
VENT TERMINAL
porch, deck or balcony
Clearance to window or
door that may be opened
Clearance to permanently
closed window
vent outlet
pliance
ply inlet
deck or balcony
search engine
INSIDE CORNER
DETAIL
G
A
B
Operable
Fixed
Closed
Operable
B
A
AIR SUPPLY INLET
US Installations
12 inches (305mm) or 12 in. 305mm)
above average snow accumulation.
4 feet (1.2 m) below or to side of opening;
1 foot (30 cm) above opening
* 12"
* Equal to or greater than soffit depth.
* Equal to or greater than soffit depth.
* No minimum to outside corner
*
3 feet (.9m) within a height 15 feet (4.5m)
*
above the meter / regulator assembly
* 3 feet (.9m)
4 feet (1.2 m) below or to side of opening;
1 foot (30 cm) above opening
3 feet (.9m) above if within 10 feet
(3m) horizontally
7 feet (2.1m)†
*12 inches (305mm)‡
*For clearances not specified in ANSI Z223.1/NFPA 54 or CSA B149.1,
clearance will be in accordance with local installation codes and the re-
quirements of the gas supplier and these installation instructions."
FIGURE 26
Page 23
H
B
I
Fixed
Closed
J
AREA WHERE TERMINAL
IS NOT PERMITTED
1
Canadian Installations
12 inches (305mm) or 12 in. 305mm)
above average snow accumulation.
6 inches (152mm) for appliances <10,000
Btuh (3kw), 12 inches (305mm) for
appliances > 10,000 Btuh (3kw) and
<100,000 Btuh (30kw), 36 inches (.9m)
for appliances > 100,000 Btuh (30kw)
* Equal to or greater than soffit depth.
* Equal to or greater than soffit depth.
* No minimum to outside corner
3 feet (.9m) within a height 15 feet (4.5m)
above the meter / regulator assembly
3 feet (.9m)
6 inches (152mm) for appliances <10,000
Btuh (3kw), 12 inches (305mm) for
appliances > 10,000 Btuh (3kw) and
<100,000 Btuh (30kw), 36 inches (.9m)
for appliances > 100,000 Btuh (30kw)
6 feet (1.8m)
7 feet (2.1m)†
12 inches (305mm)‡
M
K
2
* 12"
*