$8,452.00Original price was: $8,452.00.$7,999.00Current price is: $7,999.00.
2 Ton – Single Stage Heat Pump System
The Merit® Series 2 Ton – Single Stage Heat Pump System is a complete home comfort solution, including the ML14KP1-024 heat pump, CBK45UHPT air handler, and ECB45-10CB-P electric heat kit. Enjoy reliable, energy-efficient heating and cooling with advanced safety features and fully 2025-compliant R-454B refrigerant.
Key Benefits: ✅ 2 Ton single-stage system for year-round comfort ✅ SEER2 14.3 and HSPF2 7.8 for efficient performance ✅ Quiet operation with sound levels as low as 74 dBA ✅ Complete bundle with heat pump, air handler, and heat kit
Upgrade your home’s heating and cooling with the 2 Ton – Single Stage Heat Pump System. This complete bundle pairs the ML14KP1-024 single-stage heat pump, CBK45UHPT variable-speed air handler, and ECB45-10CB-P electric heat kit, delivering reliable, energy-efficient, and quiet year-round comfort for your home.
AHRI#: 215710129
SEER2: 14.3
SEER2: 14.3 & HSPF2: 7.8 Ratings
With a SEER2 of 14.3 and HSPF2 of 7.8, this 2 Ton – Single Stage Heat Pump System provides consistent cooling and heating while meeting 2025 refrigerant standards. It uses R-454B refrigerant, ensuring environmentally responsible operation and reduced greenhouse impact.
The ML14KP1-024 heat pump delivers standard-efficiency, single-stage heating and cooling for reliable indoor comfort. ENERGY STAR® certified and eligible for federal tax credits, it operates quietly at sound levels as low as 74 dBA. The high-efficiency outdoor coil optimizes heat transfer, and the direct-drive fan ensures long-lasting, quiet operation.
Supplemental Heating – Heat Kit: ECB45-10CB-P
The ECB45-10CB-P Electric Heat Kit provides rapid backup heat with helix-wound nichrome elements, precisely controlled limit switches, and factory-installed circuit breakers for safety. Controls are pre-wired and plug directly into the air handler for simplified installation.
Reliable Airflow – Air Handler: CBK45UHPT-024-71
The CBK45UHPT variable-speed air handler ensures consistent airflow and efficient performance. Its all-aluminum Quantum™ Coil resists corrosion, and the three-speed blower motor provides balanced circulation. The fully insulated cabinet reduces noise, while the Refrigerant Detection System (RDS) adds an extra layer of safety.
Why Choose the 2 Ton – Single Stage Heat Pump System?
Ideal for homeowners seeking a complete, dependable heating and cooling solution, this system offers consistent temperature control, efficient energy use, and quiet operation. Fully 2025-compliant with R-454B refrigerant, it provides peace of mind, reliable performance, and easy installation.
Key Benefits at a Glance
✅ Year-round comfort ✅ SEER2 14.3 and HSPF2 7.8 for efficient heating and cooling ✅ Quiet operation with sound levels as low as 74 dBA ✅ Complete bundle with heat pump, air handler, and electric heat kit ✅ Braze-free installation for modern HVAC setups ✅ Built-in Refrigerant Detection System (RDS) for added safety ✅ Fully 2025-compliant system with eco-friendly R-454B refrigerant
Heat Pump Overview
Model #ML14KP1-024
Product Overview
Merit® Series | ML14KP1 Heat Pump
Standard-efficiency, single-stage heat pump designed for 2025 compliant refrigerant systems.
Energy Efficiency & Performance
Exceptional Efficiency: Meets or exceeds performance ratings of 14.30 SEER2 and 7.50 HSPF2.
ENERGY STAR® Certified: Exceeds federal standards for energy-efficient performance.
Eligible for Federal Tax Credit: Qualifies for the Energy Efficient Home Improvement Credit (IRC Section 25C).
High-Efficiency Outdoor Coil: Engineered for superior heat transfer and reduced air resistance, optimizing overall performance.
Single-Stage Compressor: Operates at full capacity when on, delivering consistent comfort and reliable performance.
Quiet Operation
Low Sound Levels: Operates as quietly as 74 dB, ensuring minimal disruption.
Precision-Balanced Fan: Direct-drive outdoor fan is built for quieter operation, longer life, and dependable performance.
Craftsmanship & Reliability
Quantum™ Coil Technology: Featuring Lennox’s exclusive aluminum alloy, rigorously tested to withstand extreme conditions and resist corrosion.
Durable Cabinet Construction: Heavy-gauge, galvanized steel cabinet with louvered coil guard, zinc-coated steel base, and baked-on powder finish for long-lasting protection.
Flexible Installation: 2025 compliant systems support braze-free fittings for easier, more adaptable installation.
Integrated Drainage System: Built-in drainage holes help prevent moisture accumulation in the base pan.
Safety & Sustainability
Eco-Friendly Refrigerant: Uses R-454B refrigerant, compliant with 2025 EPA regulations for low global warming potential (GWP) refrigerants.
Refrigerant Detection System (RDS): Meets the latest safety codes for A2L (mildly flammable) refrigerants. The RDS includes a leak detection sensor and control board that automatically halts operation and activates the indoor blower to safely disperse refrigerant if a leak is detected.
Product Specifications:
Brand
Lennox
Catalog Number
25F48
Model/Part Number
ML14KP1-024-230
Base Unit of Measure
Unit(S)
Family
ML14KP1
Series
Merit
Product Voltage
208-230 VAC 1 Ph 60 Hz
Cooling Capacity
2 Ton
Product Depth
28.25 Inch
Product Width
28.25 Inch
Product Height
42.5 Inch
Type
Single-Stage Heat Pump
SEER2
14.3 SEER2
HSPF2
Meets or exceeds 7.5 HSPF2
Gross Weight
180 lbs.
Suction Line OD
3/4 Inch
Liquid Line OD
3/8 Inch
Energy Star Certified
Yes
Refrigerant Type
R-454B
Compressor Type
1 Stage
Heat Kit Overview
Model #ECB45-10CB
Product Overview
Lennox ECB45 Electric Heat Kits
ETL listed for safety and compliance.
Designed for field installation inside the unit cabinet.
Offered in a variety of voltage and kilowatt configurations—refer to specific Air Handler Tables for details.
Features helix-wound nichrome heating elements directly exposed to the airflow, ensuring 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 function.
An additional thermal cutoff limit control offers reliable protection against excessive temperatures.
Control box and access cover are made from heavy-gauge galvanized steel for durability.
Delivered factory-assembled with pre-installed and pre-wired controls.
Low voltage electric heat controls connect to the air handler via plug-in.
Circuit Breaker Models (CB)
All “CB” models come with built-in circuit breakers that provide both overload and short-circuit protection.
Circuit breakers are factory-mounted and wired within the electric heat unit.
They respond to both current surges and high temperatures.
Manual reset capability included.
In many areas, circuit breakers meet code requirements as the unit’s disconnecting means, eliminating the need for a separate field-installed disconnect.
Always consult your local electrical code for compliance.
Product Specifications
Brand
Lennox
Catalog Number
27A15
Model/Part Number
ECB45-10CB-P
Base Unit of Measure
Unit(S)
EAN / UPC
66255160138
Product Voltage
208/240v 1ph 60 hz
Gross Weight
4.5 LB
Family
ECB45
Heating Capacity
10.0 kW
Type
Electric Heat Kit with Circuit Breaker
Series
ECB45
Additional Information
60 Amp Circuit Beaker
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 #CBK45UHPT-024-71
Product Overview:
Merit® Series | CBK45UHPT Air Handler
Standard performance, standard-efficiency, three-speed air handler designed for 2025 compliant refrigerant systems.
Overview
The CBK45UHPT Air Handler combines proven reliability with efficient performance in a cost-effective package. Featuring Lennox’s exclusive all-aluminum Quantum™ Coil, it delivers long-lasting corrosion resistance against indoor environmental contaminants. A three-speed blower motor provides balanced, efficient air circulation for year-round comfort.
These -71 models are factory-prepared for R-454B refrigerant and include a Refrigerant Detection System (RDS) for added safety and compliance with 2025 standards.
Energy Efficiency
High-Efficiency Indoor Coil: Designed for optimal heat transfer and reduced air resistance to enhance system efficiency.
Multi-Speed PSC Motor: A Permanent Split Capacitor motor delivers reliable, efficient air circulation at an affordable cost.
Quiet Operation
Fully Insulated Cabinet: Minimizes operational sound and prevents cabinet sweating in hot, humid environments, ensuring quiet comfort.
Reliable Performance
Quantum™ Coil Technology: Built with Lennox’s proprietary aluminum alloy, rigorously tested to withstand the toughest environmental conditions.
Antimicrobial Drain Pan: Helps prevent mold and mildew growth, promoting better 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.
