The Merit® Series 3 Ton Single Stage All Electric System is a complete home comfort solution, including the ML14KC1-036 air conditioner, CBK45UHPT air handler, and ECB45-10CB-P electric heat kit. Enjoy reliable, energy-efficient cooling and heating with advanced safety features and fully 2025-compliant R-454B refrigerant.
Key Benefits
✅ 3 Ton single-stage system for year-round comfort ✅ SEER2 15.5 and EER2 13.4 for efficient performance ✅ Quiet operation with sound levels as low as 73 dB ✅ Complete bundle with air conditioner, air handler, and heat kit
Upgrade your home’s cooling system with the 3 Ton Single Stage All Electric System. This complete bundle includes the ML14KC1-036 air conditioner, CBK45UHPT-042-71 three-speed air handler, and ECB45-10CB-P electric heat kit, delivering reliable, energy-efficient year-round comfort while meeting 2025 R-454B refrigerant standards.
AHRI#:215582255
SEER2: 15.5 EER2:13.4
SEER2: 15.5 & EER2: 13.4 Ratings
With a SEER2 of 15.5 and EER2 of 13.4, this 3 Ton Single Stage All Electric System provides consistent cooling, efficient heating, and dependable performance. Its R-454B refrigerant ensures environmentally responsible operation and compliance with 2025 energy standards.
Efficient Cooling – Air Conditioner: ML14KC1-036
The ML14KC1-036 air conditioner provides standard-efficiency, single-stage 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 73 dB.
Supplemental Heating – Heat Kit: ECB45-10CB-P
The ECB45-10CB-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: CBK45UHPT-042-71
The CBK45UHPT-042-71 three-speed 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 3 Ton Single Stage All Electric System?
This system is perfect for homeowners seeking a complete, integrated cooling and heating 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 15.5 and EER2 13.4 for efficient performance ✅ Quiet operation with sound levels as low as 73 dB ✅ Complete bundle with air conditioner, air handler, and electric heat kit ✅ Multi-speed PSC motor for energy savings ✅ Built-in Refrigerant Detection System (RDS) for added safety ✅ Fully 2025-compliant system with eco-friendly R-454B refrigerant
Air Conditioner Overview
Model #: ML14KC1-036
Product Overview:
Merit® Series | ML14KC1 Air Conditioner – Standard-Efficiency, Future-Ready Cooling
The Merit® Series ML14KC1 is a reliable, standard-efficiency air conditioning system designed to deliver consistent comfort and long-lasting performance. With its single-stage compressor and compatibility with 2025 Compliant Refrigerant, this air conditioner unit provides affordable, energy-efficient cooling while meeting the latest EPA standards. Moreover, it is an excellent choice for homeowners searching for heating and air conditioning units that combine efficiency and dependability.
Energy Efficiency & Performance
This unit meets or exceeds a 14.30 SEER2 efficiency rating, making it an ideal central air conditioning system for modern homes. Additionally, it is ENERGY STAR® Certified, recognized for exceeding federal energy-efficiency guidelines, and is eligible for the Federal Tax Credit under the Energy Efficient Home Improvement Credit (IRC Section 25C). Its high-efficiency outdoor coil ensures excellent heat transfer and reduced air resistance for optimal performance. With a single-stage compressor, it runs at full capacity when needed, providing reliable home air conditioner operation.
Quiet & Comfortable Operation
Operating at sound levels as low as 73 dB, the ML14KC1 promotes a quieter home environment. Furthermore, its precision-balanced, direct-drive outdoor fan reduces noise while enhancing product longevity, making it an excellent air conditioning unit for homes that prioritize comfort.
Craftsmanship & Reliability
The Quantum™ Coil, made from an exclusive aluminum alloy, is engineered for durability and tested under extreme conditions. The heavy-gauge, galvanized steel cabinet, complete with louver coil guard, zinc-coated steel base, and baked-on powder finish, resists rust and corrosion. Additionally, braze-free installation offers flexibility for 2025 compliant systems, and built-in drainage holes prevent moisture accumulation inside the base pan, ensuring reliable heating and cooling supplies for years to come.
Safety & Sustainability
Using R-454B refrigerant, the ML14KC1 complies with 2025 EPA lower-GWP standards. It is also equipped with a Refrigerant Detection System (RDS) for A2L refrigerant safety compliance—sensors detect leaks, stop operation, and activate the indoor blower to safely disperse refrigerant. This makes it a safe and environmentally responsible air conditioning system replacement.
Complete Comfort System Option
Homeowners can pair the ML14KC1 Air Conditioner with a compatible Lennox® furnace and evaporator coil to create a full, year-round heating and air conditioning company-grade system. This combination ensures efficient, safe, and reliable central air AC unit operation for ultimate home comfort.
Key Benefits at a Glance
✅ Standard-efficiency air conditioner unit with 14.30 SEER2 rating ✅ ENERGY STAR® Certified and federal tax credit eligible ✅ Durable Quantum™ Coil built to withstand extreme conditions ✅ Quiet operation at sound levels as low as 73 dB ✅ Flexible braze-free installation design ✅ Built-in Refrigerant Detection System for enhanced safety ✅ Bundle option available with furnace and coil for complete home comfort
Product Specifications:
Brand
Lennox
Catalog Number
25C89
Model/Part Number
ML14KC1-036-230
Base Unit of Measure
Unit(S)
Family
ML14KC1
Series
Merit
Type
Single-Stage Air Conditioner
Nominal Cooling Capacity
3 Ton
Product Voltage
208-230 VAC 1 Ph 60Hz
Product Width
28.7 Inch
Product Height
37.1 Inch
Compressor Type
1 Stage
Number of Compressors
1 Compressor
SEER2
Meets or exceeds 14.30 SEER2
Gross Weight
200.0 Lbs
Liquid Line OD
3/8 Inch
Suction Line OD
7/8 Inch
Energy Star Certified
Yes
Refrigerant Type
R-454B
Product Length
28.7 Inch
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-042-71
Merit® Series | CBK45UHPT Air Handler
Standard-performance, standard-efficiency, three-speed air handler designed for 2025-compliant refrigerants.
Overview
The CBK45UHPT Air Handler delivers dependable performance and energy efficiency in an affordable package. Its all-aluminum Quantum™ Coil resists indoor corrosion, while the three-speed blower motor provides consistent air circulation throughout your home.
Factory-prepared for R-454B refrigerant, these -71 models also include a Refrigerant Detection System (RDS) for enhanced safety and compliance with 2025 standards.
Energy Efficiency
High-Efficiency Indoor Coil: Optimized for excellent heat transfer and low air resistance to maximize system efficiency.
Multi-Speed PSC Motor: Permanent Split Capacitor motor delivers reliable and efficient air circulation at an affordable cost.
Quiet Operation
Insulated Cabinet: Minimizes sound for quiet operation and helps prevent cabinet sweating in hot and humid conditions.
Reliable Performance
Quantum™ Coil Technology: Proprietary aluminum alloy exclusive to Lennox, designed to withstand harsh indoor conditions.
Antimicrobial Drain Pan: Reduces mold and mildew growth, improving indoor air quality and preventing 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.
