Lennox Signature Series

Signature collection
Dave Lennox
Signature® Collection
The Best of the Best
The Dave Lennox Signature® Collection is the ultimate expression of Lennox®innovation, and that makes it the perfect choice for your home. Each product is a standout on its own, leading the market in efficiency, quiet operation and comfort. Working together in one system, they create an environment of perfectly heated and cooled air.
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Learn about the Lennox Signature® Series by Watching This Video

Dave Lennox Signature Collection® SL25KC Air Conditioner and SL22KP Heat Pump are the most precise and efficient air conditioner and heat pump you can buy* Thanks to Precise Comfort® technology that allows the SL25KC to change its output in increments as small as 1%, your home can be cooled to perfection, with exactly the right amount of energy used every time. No other air conditioner can even come close. Lennox Signature Series is the most efficient HVAC system on the market.
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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.
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Save On Energy Costs

With demand for electricity rising, right along with energy costs, a typical homeowner can easily spend hundreds of dollars a month on utility bills, which can be the equivalent of a house payment. The bulk of a home’s energy costs, up to 60%,* comes from heating and cooling. Fortunately, there’s a bright spot.
 
The perfect amount of quiet
To reduce operating sound levels, the SL22KLV 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.
 
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.
 
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.

An idea that’s beyond brilliant

Precise, highest-efficiency, fully digital, variable-capacity, cold climate heat pump compatible with 2025 Compliant Refrigerant
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Energy Efficiency & Performance
 
  • Efficiency ratings up to 21.10 SEER2, 13.2 EER2, 10.50 HSPF2
  • Heat Pump – Lennox’ leading heat pump technology for the coldest conditions.
  • Variable-capacity compressor improves temperature and humidity control.
  • ENERGY STAR® 6.1 Certified
  • Federal Tax Credit Eligible – this product is eligible for the Energy Efficient Home Improvement Credit (Internal Revenue Code Section 25C).
  • High-efficiency outdoor coil – provides exceptional heat transfer and low air resistance for high-efficiency operation.
  • Digitally intelligent for accuracy and efficiency, pairing with the Lennox S40 Smart Thermostat.
     
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Quiet Operation
 
  • Sound levels – as low as 58 dBA with SilentComfort™ technology ensuring whisper-quiet operation.
  • Direct-drive fan – precision-balanced direct-drive outdoor fan is designed to provide quieter operation and longer product life.
     
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Craftsmanship & Reliability
 
  • Quantum™ Coil – with years of rigorous testing under the most extreme conditions, our Quantum Coil – featuring a proprietary aluminum alloy exclusive to Lennox – is designed to weather the harshest elements.
  • Cabinet Construction – heavy-gauge, galvanized steel construction, louver coil guard, baked-on powder finish and durable composite base and top panel provides long-lasting protection against rust and corrosion.
  • Accommodates braze-free installation – our 2025 compliant systems can accommodate braze-free fittings, giving you greater flexibility when installing.
  • Drainage holes – prevent damaging moisture from collecting inside the base pan.
     
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Sustainability & Safety
 
  • Our 2025 compliant systems feature a Refrigerant Detection System (RDS) mandated by the new safety code created for A2L, or mildly flammable refrigerants. The RDS is required for systems with over four pounds of refrigerant and consists of two components: the sensor, which detects leaks, and the control board, which interrupts unit operation and activates the indoor blower to disperse leaks, ensuring safe operation.
 
This product uses R-454B refrigerant, which meets the 2025 EPA regulations for lower global warming potential (GWP) refrigerants.
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CRAFTSMANSHIP
The Dealer Design Awards recognize products with features that assist in installation, maintenance, and service of installed products in the HVACR industry. This means added peace of mind for homeowners, because it means dealers themselves regard these as long-lasting, low-maintenance products.
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