ML193UH / Page 2
WARRANTY
Duralok Plus
™
Aluminized Steel Heat Exchanger -
Limited twenty 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.
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 93%.
Compact cabinet for upow, horizontal-left or horizontal-
right applications without any modications.
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, horizontal right-hand or
horizontal left-hand position without any modications.
Removable bottom seal panel shipped in place for side
return air is easily removed for bottom/end return air
applications.
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Each unit factory test operated to ensure proper
operation.
HEATING SYSTEM
Lennox Duralok Plus
™
Heat Exchanger Assembly
Lennox developed heat exchanger assembly consists
of primary heat exchanger
and secondary condenser
coil assembly.
Main multi-pass crimped
seam design clamshell
type heat exchanger.
Constructed of heavy-
gauge, aluminized steel.
Designed for normal
expansion and contraction
with maximum efciency and minimum resistance to air
ow.
Secondary heat exchanger condenser coil constructed
of aluminum ns tted to stainless steel tubes.
Coil is factory tested for leaks.
Condensate drain header box assembly located on front
of coil.
Compact size of complete heat exchanger assembly
permits low overall design of furnace cabinet.
Heat exchanger assembly has been laboratory life cycle
tested in excess of industry standards..
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FEATURES
Contents
Blower Data . . . . . . . . . . . . . . . . . . . . . . 17
Dimensions - Furnace/Coil Combined Dimensions . . 13
Dimensions - Horizontal Position . . . . . . . . . . . 11
Dimensions - Upow Position. . . . . . . . . . . . . 10
Features. . . . . . . . . . . . . . . . . . . . . . . . 2
Gas Heat Accessories . . . . . . . . . . . . . . . . 8
Installation Clearances . . . . . . . . . . . . . . . . 7
Model Number Identication . . . . . . . . . . . . . 1
Optional Accessories . . . . . . . . . . . . . . . . . 8
Optional Accessory Dimensions . . . . . . . . . . . 12
Specications . . . . . . . . . . . . . . . . . . . . . 6
Termination Kits Usage . . . . . . . . . . . . . . . . 9
Vent Lengths . . . . . . . . . . . . . . . . . . . . . 9
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