sl25kcv
Air Conditioner
The most precise and efficient air conditioner available.
R-454B
For eligible Dave Lennox Signature® Collection series models, homeowners have the opportunity to obtain the default 2‑year parts‑only extension (for a total of 12 years parts‑only coverage) or, in lieu of that option, they have the opportunity to receive 3 years of labor coverage (for a total of 10 years parts coverage and 3 years labor coverage). Other terms, conditions, and exclusions apply.
For more information, visit www.lennox.com/warrantyyourway
Features
Precision Makes Perfect
Precise Comfort® technology finely-tunes and adjusts cooling output in tiny increments, perfectly matching your energy use with your comfort, making it the highest-efficiency, variable-capacity air conditioner available.
The perfect amount of quiet
To reduce operating sound levels, the SL25KCV uses a sound-dampening system with a precision-balanced, direct-drive fan to ensure smooth, quiet operation. This lets it operate at a volume as quiet as 58 dB, or the sound of a microwave.
Sound-dampening system ensures smooth, quiet operation for a more peaceful environment.
Digitally intelligent for accuracy and efficiency
This truly digital product is designed to pair with the Lennox S40 Smart Thermostat as part of a fully communicating home comfort system. Sensors in the equipment allow the thermostat to diagnose issues and automatically make system adjustments to more accurately and efficiently maintain temperature, humidity and air quality.
A fully digital product for more accurate and efficient performance.
Cabinets designed for reliability and serviceability
Our most innovative cabinet design features panels that fit securely to the unit to prevent excess noise, along with an easily removable louver panel that allows for quick access by your technician. This proprietary design makes Lennox units more attractive and durable, quieter and easier to install and service, so nothing stands between you and having perfect air in your home.
Our most innovative cabinet design makes it more durable, quieter and faster to install and service.
A refrigerant that’s better for the environment.
This product is compliant with 2025 EPA regulations for lower global warming potential (GWP) refrigerants. The Lennox choice of 2025 Compliant Refrigerant has a lower GWP than its predecessor and is formulated to provide excellent, reliable performance of your system for years to come.
This product uses 2025 Compliant Refrigerant, which meets the 2025 EPA regulations for lower global warming potential (GWP) refrigerants.
A refrigerant that’s better for the environment.
This product is compliant with 2025 EPA regulations for lower global warming potential (GWP) refrigerants. The Lennox choice of 2025 Compliant Refrigerant has a lower GWP than its predecessor and is formulated to provide excellent, reliable performance of your system for years to come.
Ratings & Reviews
See what other customers are saying about
SL25KCV Air Conditioner
5/5
Extremely quiet and efficient!
November 01, 2026If you want a top of the line ac unit that dehumidifies and is extremely quiet this is the best option. We can hardly hear it while it’s running which is a big reason we upgraded. Ours is paired with the s40 communicating thermostat so it’s able to really dehumidify to its max potential
Yes, I recommend this product.
Streamwood, IL
Age: 35 to 44
Gender: Male
Reason for Replacement: Planned
5/5
5/5
5/5
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- * *Efficiency claim based on comparison of the average SEER2 of the SL25KCV as compared to the average SEER2 of the competitive variable capacity compressor units as published in AHRI (September 2024). Actual system efficiency may vary based on the system match and other factors; consult AHRI Directory for exact system efficiency. Precision claim based on the average cooling capacity range of the SL25KCV as compared to the average published cooling capacity of competitive 20 SEER2+ variable capacity compressor units (September 2024). Averages calculated across the full tonnage range available.
