ML180UHE / Page 2
WARRANTY
Duralok™ Aluminized Steel Heat Exchanger
- Limited twenty year warranty in residential
applications, ten years in non-residential applications.
All other covered components - Limited ve year
warranty in residential applications, one year in non-
residential applications.
Refer to Lennox Equipment Limited Warranty certicate
included with equipment for details.
APPROVALS
Units are Certied by AHRI.
Units tested and rated according to US DOE test
procedures and FTC labeling regulations.
“X” models approved by the California Energy
Commission and meet California Seasonal Efciency
requirements and California Nitrogen Oxides (NOx)
Standards.
ISO 9001 Registered Manufacturing Quality System.
Blower data from unit tests conducted in Lennox
Laboratory air test chamber.
APPLICATIONS
Input capacities of 44,000, 66,000, 88,000, 110,000 and
132,000 Btuh.
Energy efciency (AFUE) of 80%.
Compact cabinet for upow, horizontal-left or horizontal-
right applications.
Utility room, alcove, closet, crawl space, basement or
attic installation.
Lennox add-on indoor coils, high-efciency air cleaners
and humidiers can easily be added to furnace.
Shipped factory assembled with all controls installed
and wired.
Ready for installation in upow or horizontal right-hand
position without any modications. Horizontal left-hand
position requires repositioning of pressure switch.
Removable bottom seal panel shipped in place for side
return air is easily removed for bottom/end return air
applications.
Each unit factory test operated to ensure proper
operation.
FEATURES
Contents
Blower Data . . . . . . . . . . . . . . . . . . . . . . 13
Dimensions - Furnace/Coil Combined Dimensions . . 12
Dimensions - Horizontal Position . . . . . . . . . . . 10
Dimensions - Upow Position. . . . . . . . . . . . . 9
Features. . . . . . . . . . . . . . . . . . . . . . . . 2
Gas Heat Accessories . . . . . . . . . . . . . . . . 8
High Altitude Derate. . . . . . . . . . . . . . . . . . 8
Installation Clearances . . . . . . . . . . . . . . . . 7
Model Number Identication . . . . . . . . . . . . . 1
Optional Accessories . . . . . . . . . . . . . . . . . 8
Optional Accessory Dimensions . . . . . . . . . . . 11
Specications . . . . . . . . . . . . . . . . . . . . . 7
B
C
H
D
E
G
F
I
J
K
NOTE - ML180UHE FURNACES ARE NOT
AVAILABLE IN CANADA!
L