$9,878.00Original price was: $9,878.00.$9,586.00Current price is: $9,586.00.
5 Ton – Single Stage Heat Pump System
The Merit® Series 5 Ton Single Stage Heat Pump System is a complete home comfort solution, including the ML14KP1-060 heat pump, CBK45UHET air handler, and ECB45-20CB-P electric heat kit. Enjoy reliable, energy-efficient heating and cooling with advanced safety features and fully 2025-compliant R-454B refrigerant.
Key Benefits: ✅ 5 Ton single-stage system for year-round comfort ✅ SEER2 14.3 and HSPF2 7.5 for efficient performance ✅ Quiet operation with sound levels as low as 74 dB ✅ Complete bundle with heat pump, air handler, and heat kit
Upgrade your home’s heating and cooling with the 5 Ton Single Stage Heat Pump System. This complete bundle includes the ML14KP1-060 heat pump, CBK45UHET-060-71 constant-torque air handler, and ECB45-20CB-P electric heat kit, delivering reliable, energy-efficient year-round comfort while meeting 2025 R-454B refrigerant standards.
AHRI#:215747668
SEER2: 14.3
SEER2: 14.3 & HSPF2: 7.5 Ratings
With a SEER2 of 14.3 and HSPF2 of 7.5, this 5 Ton Single Stage Heat Pump System provides consistent cooling, efficient heating, and dependable performance. Its R-454B refrigerant ensures environmentally responsible operation and compliance with 2025 energy standards.
The ML14KP1-060 heat pump provides standard-efficiency, single-stage heating and cooling for reliable indoor comfort. ENERGY STAR® certified and eligible for federal tax credits, it features a high-efficiency outdoor coil for optimal heat transfer, a single-stage compressor for consistent operation, and quiet performance at sound levels as low as 74 dB.
Supplemental Heating – Heat Kit: ECB45-20CB-P
The ECB45-20CB-P Electric Heat Kit delivers fast, dependable backup heat. Helix-wound nichrome elements allow rapid warmth with lower element temperatures for longer service life. Built-in circuit breakers, thermal cutoffs, and pre-wired controls ensure safe, code-compliant installation and operation.
Reliable Airflow – Air Handler: CBK45UHET-060-71
The CBK45UHET-060-71 constant-torque air handler ensures steady airflow and energy-efficient performance. Its all-aluminum Quantum™ Coil resists corrosion, while the fully insulated cabinet reduces noise and prevents condensation. The integrated Refrigerant Detection System (RDS) enhances safety in the event of a refrigerant leak, automatically activating a mitigation flush sequence.
Why Choose the 5 Ton Single Stage Heat Pump System?
This system is perfect for homeowners seeking a complete, integrated heating and cooling solution. It delivers reliable temperature control, efficient energy usage, and quiet airflow in one package. Fully 2025-compliant and compatible with R-454B refrigerants, it ensures long-term comfort, energy savings, and peace of mind.
Key Benefits at a Glance
✅ Year-round comfort ✅ SEER2 14.3 and HSPF2 7.5 for efficient cooling and heating ✅ Quiet operation with sound levels as low as 74 dB ✅ Complete bundle with heat pump, air handler, and electric heat kit ✅ Power Saver™ constant-torque motor for energy savings ✅ Built-in Refrigerant Detection System (RDS) for added safety ✅ Fully 2025-compliant system with eco-friendly R-454B refrigerant
Heat Pump Overview
Model #ML14KP1-060
Merit® Series | ML14KP1 Heat Pump
Standard-efficiency, single-stage heat pump designed for 2025-compliant refrigerants.
Energy Efficiency & Performance
High Efficiency: Meets or exceeds 14.30 SEER2 and 7.50 HSPF2, providing reliable year-round comfort.
ENERGY STAR® Certified: Exceeds federal standards for energy-efficient operation.
Federal Tax Credit Eligible: Qualifies for the Energy Efficient Home Improvement Credit (IRC Section 25C).
High-Efficiency Outdoor Coil: Engineered for superior heat transfer and low air resistance to maximize efficiency.
Single-Stage Compressor: Runs at full capacity when on, delivering consistent performance.
Quiet Operation
Low Sound Levels: Operates as quietly as 74 dB, ensuring a peaceful indoor environment.
Direct-Drive Fan: Precision-balanced outdoor fan reduces noise and enhances long-term durability.
Craftsmanship & Reliability
Quantum™ Coil: Constructed from Lennox’s proprietary aluminum alloy and tested to endure extreme conditions.
Durable Cabinet Construction: Heavy-gauge, galvanized steel with louvered coil guard, baked-on powder finish, and zinc-coated steel base resists rust and corrosion.
Braze-Free Installation Flexibility: Compatible with braze-free fittings for easier, more adaptable installation.
Integrated Drainage: Built-in drainage holes prevent moisture buildup inside the base pan.
Safety & Sustainability
Eco-Friendly Refrigerant: Uses R-454B, compliant with 2025 EPA regulations for low global warming potential (GWP).
Refrigerant Detection System (RDS): Required for systems with over four pounds of refrigerant. The RDS includes sensors that detect leaks and a control board that automatically stops operation while activating the indoor blower to safely disperse refrigerant, ensuring safe, code-compliant performance.
Product Specifications:
Brand
Lennox
Catalog Number
25F53
Model/Part Number
ML14KP1-060-230
Base Unit of Measure
Unit(S)
Family
ML14KP1
Series
Merit
Product Voltage
208-230 VAC 1 Ph 60 Hz
Cooling Capacity
5 Ton
Product Depth
32.25 Inch
Product Width
32.25 Inch
Product Height
42.5 Inch
Type
Single-Stage Heat Pump
SEER2
14.3 SEER2
HSPF2
Meets or exceeds 7.5 HSPF2
Gross Weight
268 lbs.
Suction Line OD
1-1/8 Inch
Liquid Line OD
3/8 Inch
Energy Star Certified
Yes
Refrigerant Type
R-454B
Compressor Type
1 Stage
Heat Kit Overview
Model #ECB45-20CB
Lennox ECB45 Electric Heat Kits
ETL listed to ensure compliance with recognized safety standards.
Designed for field installation within the unit cabinet.
Offered in various voltage and kilowatt configurations—refer to the applicable Air Handler Tables for specifications.
Features helix-wound nichrome heating elements positioned directly in the airstream for rapid heat transfer, lower element temperatures, and extended service life.
Each heating element includes a precisely positioned limit control with a fixed shut-off temperature and automatic reset.
An additional thermal cutoff limit control provides reliable protection against excessive temperatures.
Control box and access cover are made from heavy-gauge galvanized steel for enhanced durability.
Shipped factory-assembled with pre-installed and pre-wired controls.
Low-voltage electric heat controls plug directly into the air handler for easy connection.
Circuit Breaker Models (CB)
All “CB” model heat kits come equipped with built-in circuit breakers for overload and short-circuit protection.
Circuit breakers are factory-installed and pre-wired within the electric heat unit.
They are sensitive to both current and temperature conditions.
Manual reset functionality is included.
In many regions, these circuit breakers qualify as the unit’s disconnecting means, eliminating the need for a separate field-installed disconnect.
Always verify with your local electrical code to ensure compliance.
Product Specifications:
Brand
Lennox
Catalog Number
27A18
Model/Part Number
ECB45-20CB-P
Base Unit of Measure
Unit(S)
EAN / UPC
66255160141
Product Voltage
208/240v 1ph 60 hz
Gross Weight
6 LB
Family
ECB45
Heating Capacity
20 kW
Type
Electric Heat Kit with Circuit Breaker
Series
ECB45
Additional Information
(1) 60 Amp & (1) 50 Amp Circuit Breaker
For Use With
CBK45 & CBA25 Series Air Handlers
Product Width
11.38 Inch
Product Height
7.0 Inch
Product Depth
21.18 Inch
Air Handler Overview
Model #CBK45UHET-060-71
Merit® Series | CBK45UHET Air Handler
Standard-performance, high-efficiency constant-torque air handler with versatile refrigerant compatibility.
Overview
The CBK45UHET Air Handler delivers reliable, energy-efficient performance for year-round comfort. Featuring all-aluminum Quantum™ Coil technology, it resists corrosion from indoor contaminants, while the constant-torque blower motor ensures quieter, more efficient airflow throughout your home.
These -71 models come factory-ready for R-454B refrigerant and include an integrated Refrigerant Detection System (RDS). If a refrigerant leak is detected, the built-in sensor triggers the mitigation control to initiate a flush sequence, ensuring safe operation and peace of mind.
Energy Efficiency
High-Efficiency Indoor Coil: Optimized for superior heat transfer and low air resistance to maximize system efficiency.
Power Saver™ Constant-Torque Motor: Uses up to 33% less energy than traditional PSC motors, reducing electricity costs while maintaining consistent airflow.
Quiet Operation
Fully Insulated Cabinet: Minimizes operational noise and prevents cabinet sweating in hot, humid conditions for a quieter, more comfortable home environment.
Home Comfort
Optional Electric Heat: Provides an instant boost of warm air to enhance comfort during colder months.
Reliable Performance
Quantum™ Coil Technology: Made from Lennox’s proprietary aluminum alloy and engineered to withstand harsh conditions.
Antimicrobial Drain Pan: Resists mold and mildew growth, improving indoor air quality and reducing the risk of drain line blockages.
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.
