True performance and rugged durability. TU, LF and LD Models

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1 Unit heaters/ Duct furnaces True performance and rugged durability TU, LF and LD Models

2 Separated Combustion Unit Heaters at a glance: Ideal for hard-to-heat applications requiring fresh air for combustion due to excessive dust, dirt or humidity or negative pressure Easy access to components through a hinged door Heat capacity ranging from,000 00,000 Unit Heaters at a glance: Meet a wide range of residential and commercial heating applications Heat capacity ranging from 0,000 90,000 Duct Furnaces at a glance: Specially designed for applications that require duct systems Heat capacity ranging from 7,000 00,000 Designed to last longer and perform better Improve comfort and efficiency with Lennox heaters and furnaces Lennox heating products include durable unit heaters and duct furnaces designed to operate at peak performance year after year. This reliability is the result of advanced engineering and high-quality components. One standard feature of all Lennox unit heaters and duct furnaces is the tubular heat exchanger, designed to enhance performance and reliability. The exchanger s curved design provides excellent heat transfer by completely exposing the heating surface to the air stream. ed surfaces minimize air resistance and even heating is allowed across all surfaces, reducing stress on the heat exchanger. The many other advanced features include an inshot burner assembly that s simple to clean and easily within reach, plus safety valves and switches and efficient directspark ignition. A self-diagnostic board with LED readout simplifies troubleshooting. EFFICIENCY RATING Unit Heaters up to 8% thermal efficiency Duct Furnaces 80% thermal efficiency WARRANTIES Unit Heaters -Year Limited Warranty on stainless steel heat exchanger 0-Year Limited Warranty on aluminized heat exchanger -Year Limited Warranty on covered components Easy to install Each unit is tested with complete cycles of start-up and shutdown before being shipped fully assembled with factory-wired controls. and electrical operation verification leads to a quick and easy start-up on the job site. The low cabinet profile of the LF and TU models allows installation even in tight spaces and helps where appearance is a concern. The simple-to-install units feature either mounting brackets or spotnuts and centrally located connections for gas, line voltage and thermostats. Most Lennox units are stocked at a depot near you and available for quick delivery or pickup. Duct Furnaces -Year Limited Warranty on stainless steel heat exchanger -Year Limited Warranty on aluminized heat exchanger -Year Limited Warranty on covered components See warranty certificate for actual details.

3 More flexibility keeps everyone more comfortable Lennox heating products are available in three unit designs to meet a wide range of commercial and residential applications. These heating products include unit heaters, duct furnaces and separated combustion unit heaters for those hard-to-heat areas. Several heating capacities are available, making it easy to keep both small and larger spaces comfortable. These reliable heaters and furnaces are available with your choice of natural gas or propane. Horizontal and vertical wall venting options allow the units to be placed in a number of locations. Separated Combustion Heater Ideal for hard-to-heat applications where excessive dust, dirt or humidity or negative pressure is a concern Durable tubular heat exchanger capacities from,000 00,000 Up to 8% thermal efficiency Compact cabinet design on,000 model TUA-00S Hinged door allows easy access to components Stainless steel heat exchanger is available for longer product life Sidewall venting eliminates roof penetrations Self-diagnostic board with LED display improves troubleshooting efficiency and accuracy LF- Unit Heaters Ideal for a wide range of residential and commercial applications capacities from 0,000 90,000 Up to 8% thermal efficiency Compact cabinet design on 0,000 7,000 models Stainless steel heat exchanger (for 00,000 and greater models) is available for longer product life Sidewall venting eliminates roof penetrations Self-diagnostic board with LED display improves troubleshooting efficiency and accuracy LD-00 Duct Furnaces Specially designed for applications requiring duct systems capacities from 7,000 00,000 Up to 80% thermal efficiency Compact, lightweight cabinet with suspension points for easy overhead installation Stainless steel heat exchanger is available for longer product life Sidewall venting eliminates roof penetrations Self-diagnostic board with LED display improves troubleshooting efficiency and accuracy

4 LF Unit Heater performance specifications gas heating performance Connections Fan Data Physical data Capacity Input Steady State Temp. Rise ºF [ºC] Vert. Flue Horiz. Flue LF-0A 0,000,00 [8.8] [7.] 8.0% [.6] [76] LF-A,000 6,00 [.] [0.7] 8.0% [7.] [76] LF-60A 60,000 8,000 [7.6] [.] [.8] LF-7A 7,000 60, [.0] [7.6] [.6] *"A" denotes aluminized steel heat exchanger. All models are volts, 60 hertz, phase. - x in. ( x 76 mm) diameter adaptor is furnished with unit for flue connection. x in. ( x 0 mm) diameter adaptor is furnished with unit for flue connection. No. of Fans Diameter 0 [] 0 [] [6] [6] No. of Blades hp [W] 0 [7] 0 [7] Full Load Amps RPMs Air Vol. CFM [L/s] [0] 70 [] 80 [90] 90 [0] Dimensions x x 60 x x 6 8 x x 87 8 x x 9 x in. (76 x 0 mm) vent adaptor required (not furnished) for horizontal venting in residential applications. x in. (0 x 7 mm) vent adaptor required (not furnished) for horizontal venting in residential applications. gas heating performance Connections Fan Data Physical data Capacity Input Natural Propane Steady State Natural Propane LF-00S LF-00A 00,000 80,00 [9.] [.6] 8,000 [.0] 80.% 8.0% LF-S LF-A,000 9,000 [.7] [7.0] 9,000 [7.0] LF-S LF-A,000,000,000 [.] [.0] [.0] LF-7S LF-7A 7,00 8,000 8,000 [0.6] [0.] [0.] LF-00S LF-00A 9,000 6,000 6,000 [7.] [.6] [.7] LF-0S LF-0A 0,000 8,000 8,000 [67.] [.9] [.9] LF-0S LF-0A 0,000 0,0 0,000 [7.] [9.0] [60.] 80.% 8.0% LF-00S LF-00A 00,000,00 6,000 [87.9] [70.8] [7] 80.% 8.0% LF-S LF-A,000 76,000 8,00 [0.] [80.9] [8.] 8.% LF-00S LF-00A 90,000 [.],000 [9.],000 [9.] Flue 6 [] 6 [] NO. of Fans / / / / / Dia. [06] [06] [06] [06] [06] [06] [06] [06] [06] [06] Full Load NO. of NO. of Amps Blades s hp [W] [total] *"S" denotes stainless steel heat exchanger. "A" denotes aluminized steel heat exchanger. All models are volts, 60 hertz, phase. - x in. ( x 0 mm) diameter adaptor is furnished with unit for flue connection. -/ x -/ in. (7 x 70 mm) rectangular to in. (7 mm) round adaptor is furnished with unit for flue connection. -/ x -/ in. (7 x 70 mm) rectangular to 6 in. ( mm) round adaptor is furnished with unit for flue connection. [.] [.] [.] [.] [.] Air Vol. CFM [L/s] Dimensions 900 [89] -/ x 0-/ x 9-/ [89] -/ x 0-/ x 9-/ [89] -/ x 0-/ x 9-/ 0 00 [0] -/ x - x 0 00 [0] -/ x - x 0 00 [07] -/ x - x [07] -/ x - x [07] -/ x - x [07] -/ x - x [07] -/ x - x - 0 LD Duct furnace performance specifications gas heating performance Connections Fan Data Physical data LD-7S LD-7A LD-00S LD-00A LD-S LD-A LD-0S LD-0A LD-00S LD-00A LD-0S LD-0A LD-00S LD-00A Capacity Input 7,000 [.0] 00,000 [9.],000 [6.6] 0,000 [.0] 00,000 [8.6] 0,000 [7.] 00,000 [87.9] 60,000 [7.6] 80,000 [.] 00,000 [9.] 0,000 [.] 0,000 [6.9] 00,000 (8.6] 0,000 [70.] Steady State Temp. Rise ºF [ºC] -7 [-6.-.7] 0-8 [ ] 0-9 [ ] 0-8 [ ] -00 [.7-7.8] -00 [.7-7.8] 6-00 [.-7.8] Flue / / Cond. Drain *"S" denotes stainless steel heat exchanger. "A" denotes aluminized steel heat exchanger. All models are volts, 60 hertz, phase. -/ x in. (7 x 0 mm) round flue adaptor is furnished with unit for flue connection. -/ x -/ in. (7 x 70 mm) rectangular to in. (7 mm) round adaptor is furnished with unit for flue connection. Note: Due to Lennox ongoing commitment to quality, all specifications, ratings and dimensions are subject to change. / / / / / / / / Air Vol. Throughout CFM [L/s] [70-7] [0-7] [80-0] [6-6] 80-0 [700-99] [87-9] [00-9] Dimensions 8. x 9. x x 0. x x 0. x 0 87 x. x x. x 0 87 x. x x. x 0 7

5 True performance, reliability and durability Tubular Heat Exchanger: Increases efficiency and durability. Combustion Air Inducer Proving Switch: Prevents unit operation if combustion air flue outlet is blocked. 6 V Combination Control Valve with 00% Safety Shutoff: Increases control and protects units. 8 Integrated Control Board with Direct-Spark Ignition: Improves unit operation and efficiency. Limit Control: Provides protection from overheat conditions. 9 6 Heavy-Gauge Steel Cabinet: Resists corrosion and provides structural stability. Flame Rollout Sensor (not shown): Improves safety. TUA-00S Easy to install and maintain 7 Aluminized Steel Inshot Burners: Low maintenance and easy to clean. Integrated Control Board with Diagnostics: Aids in troubleshooting. 8 Hinged Door: Provides easy access to components. 9 Burner View Port: For easy flame viewing. External, Line Voltage and Thermostat Connections: Speed installation. Mounting Spotnuts: Allow for threaded rod installation (00,000 through 00,000 models). Application solutions Separated Combustion Air Inlet: Provides fresh outdoor air for proper combustion. T-Class Unit Heater performance specifications gas heating performance Connections Fan Data** Physical data Capacity Input Natural TUA0S,000 [.] TUA00S 00,000 [9.] TUAS,000 [6.6] TUA0S 0,000 [.9] TUA0S 0,000 [70.] TUA00S 00,000 [87.8] Propane 6,00 6,00 [0.6] [0.6] 8,000 8,700 [.7] [.] 0,00 0,00 [9.7] [9.7] 0,000,00 [.] [.6] 9,00 96,800 [6.9] [7.6] 0,000,000 [70.] [7.] Thermal Natural Propane Temp. Rise ºF [ºC] 8.0% 8.0% [] 8.0% 8.0% [7] 8.0% 8.0% [] 9 8.0% [] 8 8.0% 8.0% [9] 8.0% [] Flue [76] 6 [] Combustion Air [76] [.7] [.7] [.7] [.7] / [9.0] / [9.0] *"S" denotes a separated combustion unit heater. All models are volts, 60 hertz, phase. **Fan motor type: Model TUA0S SP. Models TUA00S, S, 0S, 0S & 00S PSC. Stainless steel heat exchangers are available for heat sizes of 00,000 or greater models. LPG is not a factory option for stainless steel heat exchangers, but can be field-installed. Note: Due to Lennox ongoing commitment to quality, all specifications, ratings and dimensions are subject to change. NO. of Fans Dia. 0 [] [06] [06] 8 [7] [06] [06] Full Load NO. of Amps Blades hp [W] [total] RPMs 0 [7].7 0 Air Vol. CFM [L/s] 70 [] Dim. x 6 x [0] x 6. x [0] x 6. x [9] 97 x 6. x [.] 07 [60] 9 x 6. x [.] 07 [60] 9 x 6. x 9.6

6 Solutions for customized comfort Don t just choose a Lennox product choose a Lennox Commercial Comfort System. These complete packages of HVAC solutions provide tools to create a healthy and comfortable environment. Packaged Units Energence Rooftop Units Strategos Rooftop Units Landmark Rooftop Units Raider Rooftop Units Commercial Controls Systems Integration Solutions Commercial Thermostats L Connection Network VRF Outdoor Units Indoor Units Controls Mini-Split Systems Wall-Mounted Non-Ducted Ceiling Cassette Non-Ducted Medium-Static Ducted Ceiling/Floor Non-Ducted Solar Ready SunSource Commercial Energy System Unit Heaters Duct Furnaces Furnaces Split Systems S-Class Air Conditioners/Heat Pumps T-Class Air Conditioners/Heat Pumps Air Handlers Indoor Coils Indoor Air Quality Humiditrol Dehumidification System Demand Control Ventilation Air Filters UVC Lamps Visit us at or contact us at Lennox Industries Inc. For a complete list of the registered and common law trademarks owned by Lennox Industries Inc., please visit Litho U.S.A. 9M7 0/ PC877