LENNOX LF25 UNIT HEATERS

1 1 LENNOX LF25 UNIT HEATERSDESIGNED FOR EXCEPTIONAL PERFORMANCE GNED FOR EXCEPTIONAL PERFORMANCE 2 Residential heating capacities from30,000 105,000 BTU/h Unit HEATERS Up to 85% thermal effi ciencyUNIT HEATERS AT A GLANCE: Easy access to components through a hinged door Stocked and available for quick delivery or pick up at a LENNOX Store near youCommercial heating capacities from 30,000 400,000 BTU/hDesigned for easy installation in a wide range of commercial and residential applicationsDESIGNED FOR EXCEPTIONAL PERFORMANCEENGINEERED FOR MAXIMUM EFFICIENCYL ennox heating products are designed for increased reliability and peak performance, year after year. Advanced engineering and high-quality components produce a durable product that delivers comfort with maximum effi ciency. PATENTED heat EXCHANGERA standard feature of all LENNOX unit HEATERS is the tubular heat exchanger, designed to enhance performance and reliability.

2 The patented dimpled tubular design maximizes effi ciency and provides excellent heat transfer by completely exposing the heating surface to the air stream. This tubular construction minimizes air resistance to allow for even heating across all surfaces, which, when combined with a lower fi ring rate, reduces stress on the heat exchanger. ENHANCED FEATURESC ommercial unit heater models are available in stainless steel. All unit heater models off er standard features such as the ignitor, fl ame sensor, high limit switch, and 100% error proof wiring harness. Hinged access doors allow easy access to the DSI control board with 11 error codes and each unit heater is remote LED fault detection diagnostics enabled. Additional advanced features include in-shot cluster burner assembly that s simple to clean and easy to reach. 3 EASY INSTALLATIONThe simple-to-install unit heater begins with factory testing to ensure easy and quick project completion.

3 Each unit is factory wired and tested with complete cycles of startup and shutdown before being shipped. Gas and electrical operation verifi cation leads to a quick and easy start up on the job site. The low-profi le, dual-purpose, commercial and residential application LF25-30 thru LF25-105, features 180 degree installation position capability. The commercial LF25-125 thru LF25-400 units feature cage-nuts for all-thread installation, and all unit HEATERS feature easily located connections for gas, and removable terminal block for both line voltage and thermostats. ENHANCED BENEFITSL ennox heating products are available in three unit designs to meet a wide range of commercial and residential applications. With fourteen available models, it s easy to fi nd the right size heater to keep your spaces comfortable. Horizontal and vertical wall venting options, as well as the 180 installation* capability, allow the units to be placed in a number of HEATERS Ideal for a wide range of commercial and residential applications Heating capacities from 30,000 400,000 BTU/h Up to 85% thermal efficiency Stainless steel heat exchanger available on 125, 000 - 400,000 BTU/h Sidewall venting eliminates roof penetrations Self-diagnostic board with LED display improves troubleshooting efficiency and accuracyMORE FLEXIBILITY KEEPS EVERYONE COMFORTABLEgp,placed in a number of locations.

4 * Only compact models can be installed 180 4 LENNOX LF25 UNIT HEATER SPECIFICATIONSMODEL*GAS HEATING PERFORMANCECONNECTIONSINPUTHEATING CAPACITYBTU/hOUTPUTHEATING CAPACITYBTU/hLP/PROPANE OUTPUTHEATING CAPACITY BTU/hSTEADY STATE EFFICIENCYTEMP. RISE F [ C] VERT. FLUE SIZE IN [MM]HORZ. FLUE SIZE IN [MM]GAS PIPING SIZE INCHESNATURALPROPANELF25-03030,00024,900 25, 1 ,00037,35038, 1 ,00049,80051, 1 ,00062,25063, 1 ,00074,70075, 1 ,00087,15088, 1 *GAS HEATING PERFORMANCECONNECTIONSINPUTHEATING CAPACITYBTU/hOUTPUTHEATING CAPACITYBTU/hLP/PROPANE OUTPUTHEATING CAPACITY BTU/hSTEADY STATE EFFICIENCYTEMP. RISE F [ C] VERT. FLUE SIZE IN [MM]HORZ. FLUE SIZE IN [MM]GAS PIPING SIZE INCHESNATURALPROPANELF25-125125,000103,7 50105,00083%85%5044 1 ,000124,500126,00083%85%6244 1 ,000145,250147,00083%85%5855 1 ,000166,000168,00083%85%5955 1 ,000207,500210,00083%85%5955 3 ,000249,000252,00082%84%5755 3 ,000290,500294,00083%84%5866 3 ,000332,000336,00082%84%6566 3 CompactUnit HeatersLF25 Commercial Unit Heaters5 FAN DATAPHYSICAL DATANO.

5 OF FANSFA N DIAMETERNO. OF BLADESFAN PITCHMOTOR OUTPUT HP [W]FULL LOAD MOTOR AMPSRPMCFM[M3/MIN.]THROWFT. [M]DIMENSIONS L X W X HINCHES [MM]UNITWEIGHT LBS. [KG]SHIPWEIGHT LBS. [KG]MOUNTING HEIGHT RANGES FT. [M]110"437 1 x 29 x x x "437 1 x 29 x x x "434 1 x 29 x x x "434 1 x 29 x x x "428 1 x 29 x x x "428 1 x 29 x x x DATAPHYSICAL DATANO. OF FANSFA N DIAMETERNO. OF BLADESFAN PITCHMOTOR OUTPUT HP [W]FULL LOAD MOTOR AMPSRPMCFM[M3/MIN.]THROWFT. [M]DIMENSIONS L X W X HINCHES [MM]UNITWEIGHT LBS. [KG]SHIPWEIGHT LBS. [KG]MOUNTING HEIGHT RANGES FT. [M]116"436 1/5 x 24 x x x "436 1/5 x 24 x x x "535 1/3 x x x x "535 1/3 x x x x "436 1/5 x x x x "436 1/5 x x x x "535 1/3 x x x x "535 1/3 x x x x PERFORMANCE, INSTALLATION, AND SERVICEABILITYLF25-075 OFFONLOLOHIHICCHIHII I124567811101314151617181293121413151617 18 WIDE RANGE OF APPLICATIONSD impled Tubular heat Exchanger improves effi ciency and increase durabilityDSI Control Board off ers the most diagnostic codes to speed up installation and diagnosticsRemovable Thermostat and Power Connections for speed of installationFlame Rollout Switches improves safety Flame Sensor improves safetyBurner ClusterGas Manifold24V Transformer1234567891011 Direct Spark Igniter improves operation and effi ciencyPressure Switch verifi es fl ue pipe is clear for safe operation (not shown)24V Gas Valve with 100% safety shut off Primary Limit Switch improves safetyCombustion Air Inducer removes carbonGas Inlet Flue Outlet Field Power Connection for quick installFan Motor Capacitor27P05 9/19 PC92169 2019 LENNOX Industries Inc.

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