3 Ton – Variable Speed Gas System – Dave Lennox Signature Collection – Precision Comfort with Free Installation
The 3 Ton – Variable Speed Gas System – Dave Lennox Signature Collection is a complete Dave Lennox Signature® Collection heating and cooling system built around variable-capacity technology. It pairs the SL25KCV-036-230 air conditioner, the SL280UH090V36BK two-stage variable-speed gas furnace and a CK40HT-42B-71 R-454B horizontal evaporator coil for exact temperature control, whisper-quiet operation and low utility bills – installed free with your purchase by Temperature Pros in Dallas, TX.
This bundle includes:
- SL25KCV-036-230 Air Conditioner (Order #25U51) – variable-capacity cooling, up to 23.50 SEER2
- SL280UH090V36BK Gas Furnace (Order #26C64) – 80% AFUE, two-stage heat, variable-speed blower
- CK40HT-42B-71 Horizontal Evaporator Coil (Order #25V13) – R-454B dedicated, braze-free ready
SEER2: 23.5
EER2: 15
SEER2 & EER2 Ratings
This system is AHRI certified (AHRI #215438886) at 23.5 SEER2 and 15 EER2. Because the compressor modulates in increments as small as 1%, it runs long, low-speed cycles instead of switching on and off – which keeps room temperatures even, pulls more humidity out of the air and keeps your electric bill down.
Variable-Capacity Cooling
The SL25KCV-036-230 Air Conditioner delivers:
- Up to 23.50 SEER2 and 15.0 EER2 efficiency
- Precise Comfort® variable-capacity scroll compressor – adjusts output in increments as small as 1%
- Sound levels as low as 58 dBA (58 – 70 dBA AHRI 270 range) with SilentComfort™ technology
- Quantum™ Coil and coastal-rated cabinet tested to ASTM D5894
- R-454B refrigerant with Refrigerant Detection System and braze-free service valves
✅ Key Benefit: The most precise cooling Lennox builds – quiet, efficient and future-ready.
Ultra-Quiet, Variable-Speed Heating
The SL280UH090V36BK Gas Furnace provides:
- 80% AFUE efficiency with 88,000 Btuh heating capacity
- Two-stage heating with variable-speed airflow for even temperatures and better humidity control
- SilentComfort™ technology – the quietest furnace in its class
- Dual-fuel capable and iComfort™-enabled for smart thermostat control
- SureLight® igniter and control board in a heavy-duty steel cabinet
✅ Key Benefit: Whisper-quiet, steady heat that costs less to run than older single-stage furnaces.
Dedicated R-454B Horizontal Coil
The CK40HT-42B-71 Evaporator Coil completes the system with:
- R-454B dedicated design matched to 2025 refrigerant requirements
- Built-in Refrigerant Detection System (RDS) for A2L safety compliance
- Braze-free installation and durable aluminum construction
- Optimized airflow and heat transfer for full-system efficiency
✅ Key Benefit: Safe, efficient refrigerant handling that protects your investment.
Why Choose The 3 Ton – Variable Speed Gas System – Dave Lennox Signature Collection?
- AHRI certified performance – 23.5 SEER2 / 15 EER2 (AHRI #215438886)
- Fully communicating system – requires the Lennox S40 Smart Wi-Fi Thermostat (sold separately) for full variable-capacity control
- 10-year limited warranty on the compressor and covered components
- 2025-compliant R-454B refrigerant with built-in leak detection
- Free professional installation by Temperature Pros in Dallas, TX
Upgrade your Dallas home with the 3 Ton – Variable Speed Gas System – Dave Lennox Signature Collection – the quietest, most precise comfort Lennox offers, installed free with your purchase.
Air Conditioner Overview
Model #: SL25KCV-036-230
Order #: 25U51
Product Overview
Dave Lennox Signature® Collection | SL25KCV Air Conditioner
Variable-Capacity, Communicating Cooling – 2025 Compliant with R-454B Refrigerant
The Lennox SL25KCV Air Conditioner is the most precise air conditioner Lennox builds. Its Precise Comfort® variable-capacity scroll compressor runs continuously at only the capacity your home needs instead of cycling on and off, adjusting output in increments as small as 1%. Matched with a Lennox communicating variable-speed furnace or air handler, this 3 ton system is AHRI certified at 23.5 SEER2 and 15 EER2.
Energy Efficiency & Performance
- Up to 23.50 SEER2 and 15.0 EER2 (AHRI certified maximum for the SL25KCV-036-230 outdoor unit)
- Variable-capacity scroll compressor with DC Inverter Control modulates in 1% increments for exact temperature and humidity control
- Variable-speed outdoor fan (1/3 HP, 28 in., 2 blades) modulates airflow with compressor capacity
- AHRI Standard 210/240-2023 certified, ETL certified (US & Canada), built in an ISO 9001 registered facility
- Low-ambient cooling down to 0 °F outdoor air temperature
Quiet Operation
- Sound levels as low as 58 dBA – AHRI 270 rated range of 58 – 70 dBA for this size
- SilentComfort™ fan guard with Passive Vortex Suppression and a precision-balanced direct-drive fan
- Compressor Sound Dampening System – vinyl/polyester composite inner sound cover plus rubber dampeners
Craftsmanship & Reliability
- Quantum™ Coil – all-aluminum enhanced alloy tube with ripple-edged lanced fins, fully accessible for cleaning and highly corrosion resistant
- Composite base and top resist corrosion and lift the unit off the mounting surface, with base-pan drainage holes
- Louvered steel panels on all four sides with lift-off service access and pre-painted powder finish
- Tested to ASTM D5894 cyclic salt-fog/UV exposure – suitable for coastal areas
- Braze-free and press-fitting capable service valve connections for fast, flexible installation
Sustainability & Safety
- R-454B refrigerant – A2L, low GWP, zero ODP, meeting 2025 EPA refrigerant requirements
- Refrigerant Detection System (RDS) per UL 60335-2-40 – on detection the system stops the compressor and runs the indoor blower to disperse refrigerant, then resumes normal operation once levels are safe
System Requirements
- Matches only with Lennox communicating variable-speed furnaces and air handlers
- Requires a Lennox communicating thermostat – S40 Smart Wi-Fi Thermostat (22V24), ordered separately
- 10-year limited warranty on the compressor and covered components in residential applications
Key Benefits at a Glance
✅ Variable-capacity cooling that modulates in 1% increments
✅ Up to 23.50 SEER2 / 15.0 EER2 efficiency
✅ Sound levels as low as 58 dBA with SilentComfort™ technology
✅ Quantum™ Coil and coastal-rated cabinet construction
✅ R-454B refrigerant with built-in Refrigerant Detection System
✅ 10-year limited warranty on compressor and covered components
Product Specifications:
| Brand |
Lennox |
| Catalog Number |
25U51 |
| Model/Part Number |
SL25KCV-036-230 |
| Base Unit of Measure |
Unit(S) |
| Family |
SL25KCV |
| Series |
Dave Lennox Signature® Collection (DLSC) |
| Type |
Variable Capacity Air Conditioner |
| Nominal Cooling Capacity |
3 Ton |
| Product Voltage |
208-230 VAC 1 Ph 60Hz |
| Product Depth |
39-3/4 Inch |
| Product Width |
35-3/4 Inch |
| Product Height |
46-1/2 Inch |
| Compressor Type |
Variable Capacity Scroll (DC Inverter) |
| Number of Compressors |
1 Compressor |
| SEER2 |
Up to 23.50 SEER2 |
| EER2 |
Up to 15.0 EER2 |
| Sound Rating (AHRI 270) |
58 – 70 dBA |
| Gross Weight |
303 Lbs. |
| Liquid Line OD |
3/8 Inch |
| Suction Line OD |
7/8 Inch |
| Refrigerant Type |
R-454B |
Furnace Overview
Model #: SL280UH090V36BK
Order #: 26C64
Product Overview
Dave Lennox Signature® Collection | SL280V Variable Speed Gas Furnace
The Quietest Furnace in Its Class
The SL280UH090V36BK delivers luxury comfort, whisper-quiet performance, and dependable efficiency. With SilentComfort™ technology, two-stage heating, and variable speed airflow, this furnace provides even temperatures, improved humidity control, and significant energy savings compared to older systems.
Applications
- Upflow/Horizontal configuration for versatile installation
- Pairs seamlessly with Lennox® air conditioners or heat pumps for higher system efficiency
- Ideal for homeowners seeking premium comfort, quiet operation, and reliable long-term performance
Energy Efficiency
- 80% AFUE heating efficiency lowers energy bills compared to older furnaces
- Enhanced cooling efficiency when matched with Lennox® air conditioners or heat pumps
- Dual-fuel capability – integrates with a heat pump to automatically alternate between gas and electric heating for cost savings
- iComfort™-enabled technology – smart communication with iComfort Wi-Fi® thermostat for optimized performance and comfort
- Sealed blower compartment – reduces air leakage, maximizing efficiency and indoor comfort
Quiet Operation
- Quietest furnace in its class – up to 4.5 times quieter than comparable models
- SilentComfort™ technology ensures smooth, consistent, quiet heating
- Special sound-absorbing insulation reduces operating noise even further
Home Comfort
- Two-stage heating delivers steady, reliable warmth throughout the home
- Variable speed airflow ensures improved humidity control and consistent circulation
- Ultra-low continuous fan speed provides quiet, gentle air movement and supports indoor air quality systems
Reliable Performance
- SureLight® igniter – durable silicone nitride design ensures long-lasting reliability
- SureLight® control board – maintains consistent operation and efficiency
- Heavy-duty steel cabinet – sleek, corrosion-resistant, and built to last
Key Benefits
✅Ultra-quiet operation – up to 4.5x quieter than competitors
✅Energy savings – 80% AFUE efficiency with dual-fuel capability
✅Advanced comfort control – variable speed and two-stage heating
✅Smart thermostat compatibility – iComfort™-enabled for real-time adjustments
✅Durable build – heavy-duty steel cabinet and SureLight® technology for long-term reliability
Product Specifications:
| Brand |
Lennox |
| Catalog Number |
26C64 |
| Model/Part Number |
SL280UH090V36BK |
| Base Unit of Measure |
Unit(S) |
| Family |
SL280V |
| Series |
DLSC |
| Heating Capacity |
88,000 Btuh |
| Heating Efficiency |
80% AFUE |
| Configuration |
Upflow/Horizontal |
| Blower Size |
3 Ton |
| Gas Stages |
2 Stage Heat |
| Blower Type |
Variable Speed |
| Product Voltage |
115 VAC 1 Ph 60 Hz |
| Product Depth |
27.75 Inch |
| Product Width |
17.5 Inch |
| Product Height |
33 Inch |
| Gross Weight |
144 lbs. |
| Type |
2-Stage Variable Speed Horizontal Gas Furnace |
| Energy Star Certified |
No |
California Only
This furnace does not meet the South Coast Air Quality Management District (SCAQMD) Rule 1111 and San Joaquin Valley Air Pollution Control District (SJVAPCD) Rule 4905 NOx emission limit (14 ng/J) and cannot be installed within the SCAQMD and SJVAPCD areas.
Horizontal Coil Overview
Model #: CK40HT-42B-71
Order #: 25V13
Product Overview:
Merit® Series | CK40HT-71 Indoor Evaporator Coil – Horizontal, R-454B Dedicated
The CK40HT-71 is a horizontal, full-cased air conditioning unit designed for use with Lennox® air conditioners units and heat pump AC systems. Engineered specifically for R-454B refrigerant, this coil combines efficiency, durability, and safety. Additionally, factory-installed components, such as a thermostatic expansion valve and Refrigerant Detection System (RDS) sensor, ensure dependable heating and cooling units operation while maintaining compliance with A2L refrigerant safety standards. Homeowners searching for reliable air conditioning systems for sale will find this unit an excellent choice.
Energy Efficiency & Performance
This evaporator coil is available in 1.5- to 5-ton capacities, supporting a wide range of central air conditioning units and home air conditioner applications. The factory-installed R-454B thermostatic expansion valve promotes efficient operation, while the large coil surface area maximizes heat transfer and improves overall system efficiency. Furthermore, minimal air resistance ensures smoother airflow and optimized performance, making it an effective air conditioning supply option.
Quiet & Comfortable Operation
Its horizontal, full-cased design supports flexible installation in various configurations, allowing for quieter air conditioner units for homes operation. Efficient airflow contributes to reduced noise levels and enhanced overall comfort for any household air conditioning system replacement.
Craftsmanship & Reliability
Braze-free installation capability simplifies setup and adds flexibility for heating and air conditioning units. Sleeved distributor tubes and rifled aluminum tubing enhance coil durability, while the non-corrosive, UV-resistant polymer drain pan with dual connections resists leaks and extends service life. Improved gasketing reduces moisture intrusion, ensuring long-term reliability for your central air AC unit.
Safety & Sustainability
The factory-installed RDS sensor communicates with the blower control to initiate a flush sequence if a refrigerant leak is detected, ensuring safe operation. Factory-applied A2L refrigerant labeling supports compliance with 2025 safety standards. Additionally, this coil is fully compatible with R-454B refrigerant, meeting lower-GWP EPA regulations, making it a safe and environmentally responsible air conditioning system replacement. The included RDS line set sleeve ensures safe installation per manufacturer instructions.
Manufacturer Cross-Reference
Equivalent to: Goodman CHPT, Daikin CHPT, Franklin CHPT, Amana CHPT
Key Benefits at a Glance
✅ Horizontal, full-cased R-454B dedicated air conditioning unit
✅ Factory-installed TXV for high-efficiency operation
✅ Built-in RDS sensor with flush sequence for safety
✅ Braze-free installation flexibility
✅ Durable construction with rifled aluminum tubing and sleeved distributor tubes
✅ Non-corrosive, UV-resistant polymer drain pan with dual connections
✅ Compatible with Goodman, Daikin, Franklin, and Amana CHPT models
Product Specifications:
| Brand |
Lennox |
| Catalog Number |
25V13 |
| Model/Part Number |
CK40HT-42B-71 |
| Base Unit of Measure |
Unit(S) |
| Family |
CK40HT |
| Configuration |
Horizontal |
| Nominal Cooling Capacity |
3.5 Ton |
| Metering Device |
TXV (R454B) |
| Product Depth |
21.5 Inch |
| Product Width |
31.5 Inch |
| Product Height |
17.5 Inch |
| Cased |
Cased |
| Material Type |
Aluminum |
| Type |
R-454B Dedicated Evaporator Coil |
| Color |
Lennox Gray |
| Gross Weight |
67 Lbs |
| Suction Line OD |
7/8 Inch |
| Liquid Line OD |
3/8 Inch |
| Refrigerant Type |
R-454B |
