4 Ton – Variable Speed Gas System – Dave Lennox Signature Collection – Precision Comfort with Free Installation
The 4 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-048-230 air conditioner, the SL280UH090V60CK two-stage variable-speed gas furnace and a CK40HT-51/61C-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-048-230 Air Conditioner (Order #25U52) – variable-capacity cooling, up to 22.00 SEER2
- SL280UH090V60CK Gas Furnace (Order #26C69) – 80% AFUE, two-stage heat, variable-speed blower
- CK40HT-51/61C-71 Horizontal Evaporator Coil (Order #25V17) – R-454B dedicated, braze-free ready
SEER2: 21.5
EER2: 13.4
SEER2 & EER2 Ratings
This system is AHRI certified (AHRI #215438989) at 21.5 SEER2 and 13.4 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-048-230 Air Conditioner delivers:
- Up to 22.00 SEER2 and 13.8 EER2 efficiency
- Precise Comfort® variable-capacity scroll compressor – adjusts output in increments as small as 1%
- Sound levels as low as 58 dBA (58 – 73 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 SL280UH090V60CK 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-51/61C-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 4 Ton – Variable Speed Gas System – Dave Lennox Signature Collection?
- AHRI certified performance – 21.5 SEER2 / 13.4 EER2 (AHRI #215438989)
- 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 4 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-048-230
Order #: 25U52
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 4 ton system is AHRI certified at 21.5 SEER2 and 13.4 EER2.
Energy Efficiency & Performance
- Up to 22.00 SEER2 and 13.8 EER2 (AHRI certified maximum for the SL25KCV-048-230 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 – 73 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 and outer sound covers 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 22.00 SEER2 / 13.8 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 |
25U52 |
| Model/Part Number |
SL25KCV-048-230 |
| Base Unit of Measure |
Unit(S) |
| Family |
SL25KCV |
| Series |
Dave Lennox Signature® Collection (DLSC) |
| Type |
Variable Capacity Air Conditioner |
| Nominal Cooling Capacity |
4 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 22.00 SEER2 |
| EER2 |
Up to 13.8 EER2 |
| Sound Rating (AHRI 270) |
58 – 73 dBA |
| Gross Weight |
330 Lbs. |
| Liquid Line OD |
3/8 Inch |
| Suction Line OD |
7/8 Inch |
| Refrigerant Type |
R-454B |
Furnace Overview
Model #: SL280UH090V60CK
Order #: 26C69
Product Overview
Dave Lennox Signature® Collection | SL280V Gas Furnace
The SL280UH090V60CK delivers cozy, reliable warmth with whisper-quiet operation. As the quietest furnace in its class, it’s engineered for efficiency, comfort, and long-lasting performance.
Energy Efficiency & Performance
-
80% AFUE heating efficiency – saves hundreds annually compared to older furnaces
-
Improves cooling efficiency when matched with a Lennox AC or heat pump
-
Dual-fuel capability – pairs with a heat pump to reduce heating costs
-
iComfort™-enabled technology – integrates with Lennox smart thermostats for optimized performance
-
Sealed blower compartment – minimizes losses and maximizes efficiency
Quiet Operation
-
The quietest furnace in its class – up to 4.5x quieter than competitors
-
SilentComfort™ technology – consistent, quiet heating
-
Sound-absorbing materials – further reduce operational noise
Craftsmanship & Reliability
-
SureLight® igniter – durable, long-lasting ignition system
-
SureLight® control board – ensures reliable, efficient operation
-
High-quality steel cabinet with powder-coated finish – built for years of protection
-
Ultra-low continuous fan speed – provides quiet, steady airflow and enhances IAQ accessories
Key Benefits
✅ Energy-efficient performance with 80% AFUE rating
✅ Dual-fuel capability for lower heating costs
✅ Quietest furnace in its class with SilentComfort™ technology
✅ Even temperatures and superior humidity control
✅ Durable construction built to last
Product Specifications:
| Brand |
Lennox |
| Catalog Number |
26C69 |
| Model/Part Number |
SL280UH090V60CK |
| Base Unit of Measure |
Unit(S) |
| Family |
SL280V |
| Series |
DLSC |
| Heating Capacity |
88000 Btuh |
| Heating Efficiency |
80% AFUE |
| Configuration |
Upflow/Horizontal |
| Blower Size |
5 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 |
21 Inch |
| Product Height |
33 Inch |
| Gross Weight |
162 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-51/61C-71
Order #: 25V17
Product Overview
CK40HT-71 Indoor Evaporator Coil – Horizontal, Full-Cased R-454B Dedicated Model
The Lennox® CK40HT-71 horizontal evaporator coil delivers efficient and reliable cooling for your home or business. Designed for R-454B refrigerant, this full-cased horizontal coil pairs seamlessly with Lennox air conditioners and heat pumps. With factory-installed components including a thermostatic expansion valve (TXV) and Refrigerant Detection System (RDS), the CK40HT-71 supports modern HVAC systems and ensures safe, code-compliant operation.
Perfect for affordable HVAC bundles or horizontal coil replacement, this coil also offers braze-free installation, making it easy to add to your free-installation HVAC package.
Applications
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Supports 1.5- to 5-ton capacities, ideal for residential and commercial HVAC systems
-
Factory-installed R-454B TXV optimizes cooling efficiency and airflow
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Built-in RDS sensor with A2L refrigerant labeling for added safety
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Includes RDS line set sleeve for straightforward installation
-
Compatible with air conditioners, heat pumps, and full HVAC units
-
Perfect for affordable bundle upgrades with free installation offers
Coil Construction & Reliability
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Supports braze-free installation, saving time and adding flexibility for new or replacement HVAC systems
-
Sleeved distributor tubes and rifled aluminum tubing enhance coil durability
-
Large coil surface area maximizes heat transfer for efficient performance
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Non-corrosive, UV-resistant polymer drain pan with dual connections prevents leaks and extends lifespan
-
Minimal air resistance improves airflow, ensuring quiet and efficient operation
Manufacturer Cross-Reference
Compatible with leading brands: Goodman CHPT, Daikin CHPT, Franklin CHPT, Amana CHPT
Key Benefits at a Glance
✅ Horizontal, full-cased evaporator coil dedicated to R-454B refrigerant
✅ Factory-installed TXV ensures highly efficient operation
✅ Built-in RDS sensor with flush sequence for safe performance
✅ Flexible braze-free installation compatible with modern HVAC systems
✅ Durable construction with rifled aluminum tubing and sleeved distributor tubes
✅ Non-corrosive, UV-resistant polymer drain pan with dual connections
✅ Ideal for affordable HVAC bundles and free-installation promotions
✅ Compatible with Goodman, Daikin, Franklin, and Amana CHPT models
Product Specifications:
| Brand |
Lennox |
| Catalog Number |
25V17 |
| Model/Part Number |
CK40HT-51/61C-71 |
| Base Unit of Measure |
Unit(S) |
| Family |
CK40HT |
| Configuration |
Horizontal |
| Nominal Cooling Capacity |
4 to 5 Ton |
| Metering Device |
TXV (R454B) |
| Product Depth |
21.5 Inch |
| Product Width |
31.5 Inch |
| Product Height |
21 Inch |
| Cased |
Cased |
| Material Type |
Aluminum |
| Type |
R-454B Dedicated Evaporator Coil |
| Color |
Lennox Gray |
| Gross Weight |
79 Lbs |
| Suction Line OD |
7/8 Inch |
| Liquid Line OD |
3/8 Inch |
| Refrigerant Type |
R-454B |
Documents
Air Conditioner:
Installation Instructions
Furnace Documents:
Installation Instructions
Service & Application Notes
Horizontal Coil Documents:
Installation Instructions
