$19,345.00Original price was: $19,345.00.$18,981.00Current price is: $18,981.00.
5 Ton – Variable Speed Heat Pump System
The 5 Ton Elite® Series Cold Climate Heat Pump System includes the EL21KLV heat pump, CBK48MVT air handler, and ECB48-15CB-P electric heat kit. Fully 2025-compliant with R-454B refrigerant, it provides high-efficiency, quiet, and reliable heating and cooling, with optional electric backup heat for cold climate performance.
Key Benefits: ✅ 5 Ton variable-capacity cold climate heat pump ✅ SEER2 20 / HSPF2 9 for efficient performance ✅ Quiet operation – as low as 60 dBA ✅ Complete bundle: heat pump, air handler, and electric heat kit
Experience maximum efficiency and comfort with the 5 Ton Elite® Series Cold Climate Heat Pump System. This complete package includes the EL21KLV heat pump, CBK48MVT variable-speed air handler, and ECB48-15CB-P electric heat kit, delivering reliable, high-performance heating and cooling, even in extreme cold climates.
SEER2: 20
SEER2 & HSPF2 Ratings
SEER2: 20 HSPF2: 9
This system is fully 2025-compliant, uses R-454B refrigerant, and provides eco-friendly, high-efficiency operation for your home.
The EL21KLV heat pump is a high-efficiency, variable-capacity cold climate heat pump designed to maintain comfort in all seasons. ENERGY STAR® 6.1 Cold Climate Certified, it meets federal efficiency standards and qualifies for the Federal Energy Efficient Home Improvement Tax Credit.
Features:
Variable-capacity compressor for precise temperature and humidity control
Digital-ready for Lennox S40 Smart Thermostat integration
Quiet operation with sound levels as low as 60 dBA
Durable Quantum™ Coil and heavy-gauge steel cabinet
Braze-free installation flexibility for modern HVAC setups
Refrigerant Detection System (RDS) for safe operation
Supplemental Heating – Heat Kit: ECB48-15CB-P
The ECB48-15CB-P Electric Heat Kit provides instant supplemental heat during colder months. Key features include:
Helix-wound nichrome heating elements directly exposed to the airstream for fast heat transfer
Built-in limit controls and supplemental thermal cutoff for safety
Sequenced element operation with relay controls for efficient energy use
Heavy-gauge galvanized steel control box and access cover
Pre-wired and plug-in ready for quick, easy installation
Integrated circuit breakers for overload and short-circuit protection
Reliable Airflow – Air Handler: CBK48MVT
The CBK48MVT variable-speed air handler ensures even, consistent airflow throughout the home. With all-aluminum Quantum™ Coil technology, it resists corrosion and maximizes efficiency.
Features:
Factory-ready for R-454B refrigerant
Integrated Refrigerant Detection System (RDS) activates flush sequence in case of leaks
Variable-speed blower motor eliminates hot or cold spots
Fully insulated cabinet for quiet operation and prevention of condensation
Optional electric backup heat for immediate warmth
Antimicrobial drain pan enhances indoor air quality and reduces drain clogs
Why Choose the Elite® Series Cold Climate Heat Pump System?
Ideal for cold climates with supplemental heating when needed
5 Ton capacity for larger homes or high-demand applications
Eco-friendly R-454B refrigerant with low global warming potential
Digital-ready with Lennox Smart Thermostat compatibility
Quiet, reliable, and efficient year-round performance
Fully 2025-compliant system with RDS for safety
Key Benefits at a Glance
✅ 5 Ton variable-capacity cold climate heat pump ✅ SEER2 20 / HSPF2 9 for efficient performance ✅ Quiet operation – as low as 60 dBA ✅ Complete bundle: heat pump, air handler, and electric heat kit ✅ Braze-free installation flexibility ✅ Built-in Refrigerant Detection System (RDS) ✅ Supplemental electric heat for cold weather
Heat Pump Overview
Model #: EL21KLV-060
Product Overview
Elite® Series | EL21KLV Heat Pump
The EL21KLV is a high-efficiency, variable-capacity, cold climate heat pump that is digital-ready and fully compatible with 2025 refrigerant standards.
Energy Efficiency
Delivers impressive energy performance with ratings up to 20.5 SEER2 and 10.0 HSPF2.
Variable-capacity compressor offers precise control over temperature and humidity for improved comfort.
ENERGY STAR® 6.1 Cold Climate Certified, exceeding federal efficiency requirements for cold climate performance.
Eligible for Federal Tax Credits under the Energy Efficient Home Improvement Credit (IRC Section 25C).
Digital-ready when paired with a fully digital Lennox 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.
Direct-drive fan is precision-balanced for quieter performance and extended equipment life.
Craftsmanship & Build Quality
Quantum™ Coil – Constructed with Lennox’s exclusive aluminum alloy and rigorously tested to ensure resistance to corrosion and extreme weather conditions.
Durable cabinet design – Built from heavy-gauge galvanized steel with a louvered coil guard, corrosion-resistant powder coat finish, and a sturdy composite base and top panel for long-term protection.
Braze-free installation ready – Supports braze-free fittings for added installation flexibility with 2025-compliant systems.
Integrated drainage holes prevent moisture buildup within the base pan, reducing the risk of internal damage.
Safety & Reliability
Includes a built-in Refrigerant Detection System (RDS) to meet new safety standards for A2L (mildly flammable) refrigerants:
A leak sensor detects refrigerant presence
A control board automatically halts system operation and activates the indoor blower to safely disperse refrigerant
Uses R-454B refrigerant, meeting the 2025 EPA requirement for lower Global Warming Potential (GWP) refrigerants.
Product Specifications:
Brand
Lennox
Catalog Number
25K28
Model/Part Number
EL21KLV-060-230
Base Unit of Measure
Unit(S)
Family
EL21KLV
Series
Elite
Product Voltage
208-230 VAC 1 Ph 60 Hz
Cooling Capacity
5 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
Up to 9.0 HSPF2
Gross Weight
295 Lbs.
Refrigerant Type
R-454B
Heat Kit Overview
Model #: ECB48-20CB-P
Product Overview
Lennox ECB48 Electric Heat Kits
The Lennox ECB48 Electric Heat Kits are designed for seamless integration into compatible air handler units, offering reliable electric heat performance with enhanced safety features and efficient operation.
Key Features
ETL Listed – Meets rigorous safety and performance standards.
Field-Installed Design – Installs directly inside the unit cabinet for space-saving convenience.
Flexible Sizing Options – Available in multiple voltage and kW configurations (refer to specific Air Handler Tables for details).
Efficient Heating Elements – Helix-wound nichrome elements are exposed directly to the airstream, ensuring fast heat transfer, lower element temperatures, and extended service life.
Built-In Limit Controls – Each heating element includes a precisely positioned temperature limit switch with a fixed shut-off point and automatic reset.
Thermal Cutoff Protection – A secondary cutoff limit adds an extra layer of safety against high temperatures.
Sequenced Operation – Heater control relays activate elements in timed, equal steps based on input from the control board, optimizing energy use and reducing wear.
Relay(s) Included – Heating control relays are standard with each unit.
Durable Construction – Control box and access cover made from heavy-gauge galvanized steel for long-term durability.
Pre-Wired Assembly – Factory-assembled with all controls installed and wired for quick and easy installation.
Plug-In Compatibility – Low-voltage electric heat controls connect directly to the air handler.
Circuit Breaker Models (CB)
Built-In Circuit Protection – CB models feature integrated circuit breakers for both overload and short circuit protection.
Pre-Installed at Factory – Breakers are wired and mounted to the electric heat unit for added convenience.
Dual Sensitivity – Breakers are both current-sensitive and temperature-actuated.
Manual Reset Capability – Allows easy service and safe restart after tripping.
Code-Compliant Disconnect – In many regions, circuit breakers qualify as the unit’s disconnect, eliminating the need for a separate field-installed disconnect switch.
Local Code Compliance – Always consult your local electrical codes for installation requirements.
Product Specifications:
Brand
Lennox
Catalog Number
27A57
Model/Part Number
ECB48-20CB-P
Base Unit of Measure
Unit(S)
EAN / UPC
66255161448
Product Voltage
208/230v 1ph 60 hz
Gross Weight
8.7 LB
Family
ECB48
Series
ECB48
For Use With
CBK48 Series Air Handlers
Air Handler Overview
Model #: CBK48MVT-060-71
Product Overview
CBK48MVT Air Handler
The CBK48MVT is a high-efficiency, variable-speed air handler that delivers consistent comfort and is fully compatible with 2025-compliant refrigerants. Engineered for reliable performance, this model combines proven durability with advanced airflow control.
Advanced Coil Technology
Built with all-aluminum Quantum™ Coil technology, the CBK48MVT offers superior resistance to corrosion caused by indoor environmental contaminants—ensuring long-lasting, efficient performance.
R-454B & Leak Detection Ready
Factory-configured for R-454B refrigerant, these -71 models are equipped with a Refrigerant Detection System (RDS). If a leak occurs, a built-in sensor triggers the mitigation control to initiate a flush sequence, helping maintain safe system operation and providing peace of mind.
Energy Efficiency
High-efficiency indoor coil ensures excellent heat transfer and minimal airflow resistance
Variable-speed blower motor delivers consistent airflow and helps eliminate hot or cold spots
Quiet Operation
Fully insulated cabinet minimizes sound output for quiet performance
Helps prevent cabinet sweating in hot and humid environments
Home Comfort
Optional electric backup heat provides a quick and reliable source of warm air when needed most
Reliable Performance
Antimicrobial drain pan inhibits mold and mildew growth
Promotes better indoor air quality and helps prevent 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.
