The 2 Ton Elite® Series Cold Climate Heat Pump System includes the EL21KLV heat pump, CBK48MVT air handler, and ECB48-9CB-P electric heat kit, delivering quiet, reliable, and energy-efficient heating and cooling. Fully 2025-compliant with R-454B refrigerant, it provides superior cold climate performance, safety, and home comfort.
Key Benefits: ✅ Quiet operation – as low as 60 dBA ✅ Complete bundle: heat pump, air handler, and electric heat kit ✅ Braze-free installation flexibility for modern HVAC setups ✅ Built-in Refrigerant Detection System (RDS) for enhanced safety ✅ 2025-compliant system with environmentally responsible R-454B refrigerant
Experience year-round comfort with maximum efficiency using the 2 Ton Elite® Series Cold Climate Heat Pump System. This complete bundle includes the EL21KLV heat pump, CBK48MVT variable-speed air handler, and ECB48-9CB-P electric heat kit, delivering reliable, energy-efficient heating and cooling, even in extreme cold climates.
SEER2: 20.5
SEER2 & HSPF2 Ratings
SEER2: 20.5 HSPF2: 10
With a SEER2 of 20.5 and HSPF2 of 10, this Elite® Series system provides superior heating and cooling performance, while remaining fully compliant with 2025 refrigerant standards. Utilizing eco-friendly R-454B refrigerant, it ensures efficient operation and reduces your environmental impact.
The EL21KLV heat pump is a variable-capacity, cold climate heat pump designed for maximum efficiency. ENERGY STAR® 6.1 Cold Climate Certified, it meets or exceeds federal guidelines for efficient operation in colder regions. Federal tax credit eligible, this system also pairs seamlessly with Lennox S40 Smart Thermostats for digital-ready control and precise climate management. Enjoy quiet operation at sound levels as low as 60 dBA, thanks to its precision direct-drive outdoor fan.
Supplemental Heating – Heat Kit: ECB48-9CB-P
The ECB48-9CB-P Electric Heat Kit provides fast, reliable supplemental heat. Helix-wound nichrome heating elements are directly exposed to airflow for rapid heat transfer, lower element temperatures, and extended service life. Safety features include built-in limit controls, supplemental thermal cutoff, and integrated circuit breakers. Pre-wired and plug-in ready, installation is quick and safe.
Reliable Airflow – Air Handler: CBK48MVT-018/024-71
The CBK48MVT variable-speed air handler ensures consistent airflow and comfort. Constructed with all-aluminum Quantum™ Coil technology, it resists corrosion from indoor environmental contaminants. Its variable-speed blower motor minimizes hot and cold spots, maintaining even temperatures. Optional electric backup heat provides supplemental warmth when needed. Fully insulated, the cabinet reduces noise, prevents condensation, and includes a built-in Refrigerant Detection System (RDS) for enhanced safety.
Why Choose the Elite® Series Cold Climate Heat Pump System?
This system is perfect for homeowners in cold climates seeking superior efficiency and comfort. It delivers quiet operation, reliable heating, and energy savings in a fully integrated, 2025-compliant system. Using R-454B refrigerant and featuring digital-ready technology, this bundle offers long-term reliability, safety, and home comfort.
Key Benefits at a Glance
✅ 2 Ton variable-capacity cold climate heat pump ✅ SEER2 20.5 and HSPF2 10 for exceptional efficiency ✅ Quiet operation – as low as 60 dBA ✅ Complete bundle: heat pump, air handler, and electric heat kit ✅ Braze-free installation flexibility for modern HVAC setups ✅ Built-in Refrigerant Detection System (RDS) for enhanced safety ✅ 2025-compliant system with environmentally responsible R-454B refrigerant
Heat Pump Overview
Model #: EL21KLV-024
Product Overview
Elite® Series | EL21KLV Heat Pump High-efficiency, digital-ready, variable-capacity cold climate heat pump designed for compatibility with 2025-compliant refrigerants.
Energy Efficiency
Delivers outstanding energy performance with ratings of up to 20.5 SEER2 and 10.0 HSPF2
Variable-capacity compressor enhances temperature and humidity control for year-round comfort
ENERGY STAR® 6.1 Cold Climate Certified – exceeds federal efficiency standards specifically for cold climate applications
Eligible for Federal Tax Credit under the Energy Efficient Home Improvement Credit (IRC Section 25C)
Fully digital-ready when paired with a digitally enabled furnace or air handler and the Lennox S40 Smart Thermostat
Quiet Operation
Operates at sound levels as low as 60 dBA for a more peaceful outdoor environment
Precision-balanced direct-drive fan ensures quieter operation and extended system life
Craftsmanship & Quality
Quantum™ Coil – Built with a proprietary aluminum alloy and tested under extreme conditions, this advanced coil technology is engineered for maximum durability against environmental stressors
Rugged cabinet construction – Features heavy-gauge galvanized steel, a louvered coil guard, a baked-on powder coat finish, and a durable composite base and top for superior corrosion resistance
Braze-free installation compatibility – Designed to accommodate braze-free fittings, offering more flexible installation options
Integrated drainage holes prevent moisture accumulation and protect internal components
Safety & Reliability
Equipped with a Refrigerant Detection System (RDS) to comply with new A2L refrigerant safety codes. For systems containing more than four pounds of refrigerant, this system includes:
A sensor that detects refrigerant leaks
A control board that shuts down unit operation and activates the indoor blower to safely disperse leaked refrigerant
Uses R-454B refrigerant, compliant with the 2025 EPA mandate for lower global warming potential (GWP) refrigerants, supporting a more sustainable future
Product Specifications:
Brand
Lennox
Catalog Number
25J86
Model/Part Number
EL21KLV-024-230
Base Unit of Measure
Unit(S)
Family
EL21KLV
Series
Elite
Product Voltage
208-230 VAC 1 Ph 60 Hz
Cooling Capacity
2 Ton
Product Depth
39.64 Inch
Product Width
35.64 Inch
Product Height
45.33 Inch
Compressor Stages
Variable Capacity
Type
Low Ambient Heat Pump
SEER2
Upto 20.5 SEER2
HSPF2
Upto 10.0 HSPF2
Gross Weight
250 Lbs.
Refrigerant Type
R-454B
Heat Kit Overview
Model #: ECB48-9CB-P
Lennox ECB48 Electric Heat Kits
The Lennox ECB48 Electric Heat Kits are ETL listed and designed for field installation directly inside the unit cabinet. These kits are available in a variety of voltage and kilowatt configurations—refer to the appropriate Air Handler Tables for model compatibility.
Featuring helix-wound nichrome heating elements, the kits deliver rapid heat transfer by positioning the elements directly in the airflow. This design ensures lower element temperatures and extends the lifespan of the components. Each heating element is equipped with a precisely located limit control that includes a fixed shut-off temperature and automatic reset for added safety. An additional thermal cutoff limit provides a secondary layer of protection in the event of excessive temperatures.
Heater control relays are included as standard and operate the elements in equal increments, turning them on and off sequentially based on signals from the control board, with built-in time delays between each stage for efficient performance. The control box and access panel are built from heavy-gauge galvanized steel to ensure long-term durability. Units are factory-assembled with all controls pre-installed and wired. Low-voltage electric heat controls plug directly into the air handler for easy connection.
Circuit Breaker Models (CB)
CB models are equipped with integrated circuit breakers that offer protection against overload and short circuits. These breakers are factory-mounted and wired within the electric heat unit. They are both current-sensitive and temperature-actuated, and feature manual reset functionality. In many regions, these built-in breakers meet code requirements as a disconnecting means, eliminating the need for a separate field-supplied disconnect. Always consult local electrical codes for compliance before installation.
Product Specifications:
Brand
Lennox
Catalog Number
27A54
Model/Part Number
ECB48-9CB-P
Base Unit of Measure
Unit(S)
EAN / UPC
66255161445
Product Voltage
208/230v 1ph 60 hz
Gross Weight
5.5 LB
Family
ECB48
Series
ECB48
For Use With
CBK48 Series Air Handlers
Air Handler Overview
Model #: CBK48MVT-018/024-71
Product Overview
CBK48MVT Air Handler
The CBK48MVT is a high-efficiency, variable-speed air handler offering dependable performance and full compatibility with 2025-compliant refrigerants.
Built with all-aluminum Quantum™ Coil technology, this air handler delivers outstanding resistance to corrosion from indoor environmental contaminants. The unit also features a variable-speed blower motor, which maintains consistent airflow throughout the home and helps minimize temperature fluctuations.
The -71 models are factory-configured for R-454B refrigerant and come equipped with an integrated Refrigerant Detection System (RDS). In the event of a leak, the onboard sensor triggers the mitigation system to initiate a flush sequence—ensuring safe operation and peace of mind.
Energy Efficiency
High-efficiency indoor coil ensures excellent heat transfer with minimal air resistance for optimized energy performance.
Variable-speed blower motor delivers smooth, consistent airflow, enhancing efficiency and reducing temperature swings.
Quiet Operation
Fully insulated cabinet helps minimize sound levels during operation for a quieter indoor environment.
Insulation also helps prevent condensation buildup or “sweating” in humid conditions.
Home Comfort
Optional electric backup heat provides fast, supplemental warmth when needed, enhancing comfort during colder periods.
Reliable Performance
Antimicrobial drain pan helps prevent mold and mildew growth, supporting improved indoor air quality and reducing the chance of drain line clogs.
SEER stands for Seasonal Energy Efficiency Ratio. It measures the cooling efficiency of an air conditioner or heat pump over an entire cooling season. Essentially, it tells you how much cooling output (BTUs) you get for every unit of energy (watt-hour) used.
Higher SEER = more efficient
SEER ratings have traditionally been used in the U.S. to compare energy efficiency across systems.
Example: A 14 SEER unit uses less electricity than a 10 SEER unit to produce the same cooling.
What is SEER2?
SEER2 is the updated efficiency rating standard that reflects new federal testing procedures implemented by the Department of Energy (DOE) in 2023. It measures efficiency more accurately by accounting for real-world conditions, including:
Energy usage in modern airflow and installation configurations
More realistic climate and seasonal variations
Changes in the refrigerants and equipment designs
Key difference: SEER2 ratings tend to be slightly lower than SEER ratings for the same unit, but they provide a truer representation of actual efficiency in your home.
Why SEER2 is the new standard
The DOE updated testing to better match how systems perform in real homes, rather than ideal lab conditions.
It encourages manufacturers to improve real-world efficiency, not just test-case efficiency.
For consumers, SEER2 ensures:
Better long-term energy savings
Improved comfort through more accurate performance expectations
Compliance with modern federal efficiency regulations
In short:
SEER = old efficiency measurement (ideal lab conditions)
SEER2 = modern, realistic efficiency standard (real-world performance)
Better quality = SEER2 units are designed and tested to give actual efficiency and savings, not just theoretical numbers.
Understanding EER vs EER2
What is EER?
EER stands for Energy Efficiency Ratio. It measures an air conditioner or heat pump’s efficiency at a single, specific outdoor temperature, usually 95°F.
Higher EER = more efficient at peak conditions.
Unlike SEER, which averages efficiency over a season, EER tells you how the unit performs under hot, steady-state conditions.
Example: A unit with an EER of 12 produces 12 BTUs of cooling for every watt of electricity consumed.
What is EER2?
EER2 is the updated testing standard introduced by the Department of Energy (DOE) to match the same real-world adjustments as SEER2.
Accounts for modern system designs, refrigerants, and installation configurations.
Measures efficiency more realistically under peak operating conditions, rather than just ideal lab setups.
Like SEER2, EER2 numbers are usually slightly lower than traditional EER, but they are a more accurate reflection of actual performance.
Why EER2 is the new standard
Ensures consistency with SEER2 testing methodology.
Reflects true cooling efficiency under extreme heat, where peak performance matters most.
Helps consumers understand real-world energy use and savings potential during the hottest days.
Meets modern federal efficiency regulations and encourages manufacturers to improve performance under actual conditions.
In short:
EER = old standard, measured under lab conditions at 95°F
EER2 = modern standard, measured under realistic, real-world peak conditions
Better quality = EER2 gives you true peak efficiency, not just theoretical performance.
