Most precise and efficient heat pump available
The Lennox SL22KLV Dave Lennox Signature® Collection is a high-efficiency, variable-capacity heat pump, optimized for cold climates. As part of the premium Signature® series, it represents Lennox's most advanced technology, delivering exceptional energy savings and precise temperature control for year-round comfort.
Key Features
- Variable-capacity technology: The SL22KLV features a variable-speed compressor with Electronic Refrigerant Injection (ERI), allowing it to modulate its heating and cooling output from 35% to 100% capacity. This provides consistent indoor temperatures without the large fluctuations of standard systems and enhances dehumidification.
- Ultra-high energy efficiency: It offers efficiency ratings of up to 21.10 SEER2 and 10.50 HSPF2, making it one of the most efficient cold-climate heat pumps available.
- ENERGY STAR® certified: Most Efficient Certified for 2025 and eligible for seasonal rebates
- Best-in-class cold climate performance: The advanced ERI technology allows the heat pump to increase heating output in colder temperatures, providing efficient and powerful heating even in freezing conditions (down to -15°F [-26°C]).
- Whisper-quiet operation: Utilizing Lennox's SilentComfort™ technology, the unit's direct-drive fan and advanced sound-dampening features enable it to operate at sound levels as low as 58 dBA.
- Durable construction: It has an innovative cabinet design with a composite base and top that resist corrosion, while a proprietary aluminum alloy Quantum™ Coil protects against harsh elements.
- Dual-fuel compatible with Lennox® furnaces or all-electric compatible with Lennox air handlers
Technology and Reliability
- Smart home integration: The SL22KLV is designed to be paired with a communicating thermostat, such as the Lennox S40 Smart Thermostat. This enables advanced control, remote monitoring, and automatic system adjustments for optimized performance.
- Eco-friendly refrigerant: It uses the R-454B refrigerant, which has a lower global warming potential (GWP) and is compliant with 2025 EPA regulations.
- Durable build: The unit features an innovative cabinet with a composite base and top for corrosion resistance and a proprietary aluminum alloy Quantum™ Coil to withstand harsh weather.
- Ease of service: The cabinet includes easily removable louvered panels, allowing for quick access during maintenance and service calls.
- Warranty: The SL22KLV comes with a 10-year limited warranty on the compressor and covered components for residential installations.