Page 2
LGH036-360 Agency
United States
The unit is ETL/CSA certified for outdoor installations only
at the clearances to combustible materials listed on the
unit nameplate and in Figure 1, Figure 2 and Figure 3.
LGH036, 048, 060, 072, 074 UNIT CLEARANCES
C
D
B
A
FIGURE 1
1
Unit
Clearance
A
in.(mm)
B
in.(mm)
C
in.(mm)
D
in.(mm)
Top
Clearance
Service
Clearance
48
(1219)
36
(914)
36
(914)
36
(914)
Unobstructed
Clearance to
Combustibles
36
(914)
1
(25)
1
(25)
1
(25)
Unobstructed
Minimum Opera-
tion Clearance
36
(914)
36
(914)
36
(914)
36
(914)
Unobstructed
Note - Entire perimeter of unit base requires support when elevated above
mounting surface.
1
Service Clearance -
Required for removal of serviceable parts.
Clearance to Combustibles -
Required clearance to combustible material.
Minimum Operation Clearance -
Required clearance for proper unit operation.
LGH092, 094, 102, 120, 122, 150, 152
UNIT CLEARANCES
C
D
B
A
Optional
Outdoor
Air Hood
FIGURE 2
1
Unit
Clearance
A
in.(mm)
B
in.(mm)
C
in.(mm)
D
in.(mm)
Top Clear-
ance
Service
Clearance
60
(1524)
36
(914)
36
(914)
60
(1524) Unobstructed
Clearance to
Combustibles
36
(914)
1
(25)
1
(25)
1
(25)
Unobstructed
Minimum Oper-
ation Clearance
36
(914)
36
(914)
36
(914)
36
(914)
Unobstructed
Note - Entire perimeter of unit base requires support when elevated above
mounting surface.
1
Service Clearance -
Required for removal of serviceable parts.
Clearance to Combustibles -
Required clearance to combustible material.
Minimum Operation Clearance -
Required clearance for proper unit operation.
LGH156, 180, 210, 240, 242, 300, 360
UNIT CLEARANCES
C
D
B
A
Outdoor
Air Hood
Number of
fans varies
by model.
FIGURE 3
1
Unit
Clearance
A
in.(mm)
B
in.(mm)
C
in.(mm)
D
in.(mm)
Top
Clearance
Service
Clearance
60
(1524)
36
(914)
36*
(914)
66
(1676) Unobstructed
Clearance to
Combustibles
36
(914)
1
(25)
1
(25)
1
(25)
Unobstructed
Minimum Opera-
tion Clearance
45
(1143)
36
(914)
36**
(914)
41
(1041) Unobstructed
*242, 300H and 360 units with high static exhaust fans allow 80in. (2032mm).
**242, 300H and 360 units with high static exhaust fans allow 80in. (2032mm).
Note - Entire perimeter of unit base requires support when elevated above
mounting surface.
1
Service Clearance -
Required for removal of serviceable parts.
Clearance to Combustibles -
Required clearance to combustible material.
Minimum Operation Clearance -
Required clearance for proper unit operation.
Installation of the ETL/CSA certified units must conform
with local building codes. In the absence of local codes,
units must be installed according to the current National
Fuel Gas Code ANSI Z223.1/NFPA 54.
When installed, the unit must be electrically wired and
grounded according to local codes or, in the absence of
local codes, with the current National Electric Code, ANSI/
NFPA 70.
The current American National Standard (ANSIZ233.1/
NFPA54) National Fuel Gas Code is available from the
following address:
American National Standard Institute Inc.
11 West 42nd Street
New York, NY 10036
1 - The current National Electric Code (ANSI/NFPA 70) is
available from the following address:
National Fire Protection Association
1 Batterymarch Park
PO Box 9101
Quincy, MA 02269-9101
Use only the type of gas approved for use with this fur-
nace. Refer to unit nameplate.
