Description

5 Ton – Single Stage All Electric System

Complete Home Comfort Bundle

Upgrade your home’s cooling with the 5 Ton Single Stage All Electric System. This complete bundle includes the ML14KC1-060 air conditioner, CBK45UHET-060-71 constant-torque air handler, and ECB45-20CB-P electric heat kit, providing reliable, energy-efficient year-round comfort while meeting 2025 R-454B refrigerant standards.

AHRI#: 215582474

SEER2: 13.8 EER2:12

SEER2: 13.8 & EER2: 12 Ratings

With a SEER2 of 13.8 and EER2 of 12, this 5 Ton Single Stage All Electric System delivers consistent cooling and efficient heating performance. Its R-454B refrigerant ensures environmentally responsible operation and compliance with 2025 energy standards.

Efficient Cooling – Air Conditioner: ML14KC1-060

The ML14KC1-060 air conditioner provides standard-efficiency, single-stage cooling for reliable home 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: ECB45-20CB-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 All Electric System?

This system is ideal 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 13.8 and EER2 12 for efficient cooling and heating
✅ Quiet operation with sound levels as low as 73 dB
✅ Complete bundle with air conditioner, 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

Air Conditioner Overview

Model #: ML14KC1-060

Product Overview:

Merit® Series | ML14KC1 Air Conditioner – Standard-Efficiency, Future-Ready Cooling

The Merit® Series ML14KC1 is a standard-efficiency air conditioner unit crafted to provide reliable and energy-efficient air conditioning for your home. Compatible with 2025 Compliant Refrigerant, this unit delivers consistent comfort while meeting the latest EPA and industry energy standards. For homeowners searching for a dependable central air conditioning system, air conditioning units for homes, or a complete heating and air conditioning unit, the ML14KC1 offers efficiency, durability, and peace of mind.

Energy Efficiency & Performance

This air conditioner meets or exceeds a 14.30 SEER2 efficiency rating, making it one of the most energy-efficient home air conditioner options available. It is ENERGY STAR® Certified, exceeding federal energy-efficiency guidelines, and is eligible for the Federal Tax Credit under the Energy Efficient Home Improvement Credit (IRC Section 25C). The high-efficiency outdoor coil ensures excellent heat transfer with low air resistance, and the single-stage compressor runs at full capacity to deliver reliable air conditioning systems for sale. Consequently, this unit is perfect for anyone looking to upgrade their central air AC unit or air conditioning system replacement.

Quiet & Comfortable Operation

Operating at sound levels as low as 73 dB, the ML14KC1 ensures a quieter and more comfortable home environment. Moreover, the precision-balanced, direct-drive outdoor fan reduces noise and increases the lifespan of your air conditioner units for homes. This makes it an excellent choice for homeowners who value both comfort and performance in their air conditioning units.

Craftsmanship & Reliability

The proprietary Quantum™ Coil, constructed from durable aluminum alloy, is designed to withstand harsh weather conditions. Additionally, the heavy-gauge, galvanized steel cabinet with louver coil guard, baked-on powder finish, and zinc-coated steel base provides long-lasting protection against rust and corrosion. Braze-free installation flexibility supports 2025 compliant systems, while built-in drainage holes prevent moisture buildup, enhancing the reliability of your heating and cooling units.

Safety & Sustainability

Using R-454B refrigerant, this system complies with 2025 EPA lower-GWP standards. The built-in Refrigerant Detection System (RDS) ensures A2L refrigerant safety compliance by detecting leaks, halting operation, and activating the indoor blower to safely disperse refrigerant. This makes it a safe, environmentally responsible air conditioning system replacement.

Complete Comfort System Option

For year-round comfort, pair the ML14KC1 Air Conditioner with a compatible Lennox® furnace and evaporator coil to create a complete central air AC unit solution. This combination delivers efficient, reliable, and safe heating and air conditioning units performance throughout the year.

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 for 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	25C98
Model/Part Number	ML14KC1-060-230
Base Unit of Measure	Unit(S)
Family	ML14KC1
Series	Merit
Type	Single-Stage Air Conditioner
Nominal Cooling Capacity	5 Ton
Product Voltage	208-230 VAC 1 Ph 60Hz
Product Width	32.7 Inch
Product Height	43.1 Inch
Compressor Type	1 Stage
Number of Compressors	1 Compressor
SEER2	Meets or exceeds 14.30 SEER2
Gross Weight	260.0 Lbs
Liquid Line OD	3/8 Inch
Suction Line OD	1-1/8 Inch
Energy Star Certified	Yes
Refrigerant Type	R-454B
Product Length	32.7 Inch

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.

Product Specifications:

Brand	Lennox
Catalog Number	25J45
Model/Part Number	CBK45UHET-060-71
Base Unit of Measure	Unit(S)
Family	CBK45UHET
Cooling Capacity	5 Ton
Configuration	Upflow/Horizontal
Blower Type	Constant Torque
Coil Material	Aluminum Coil
Type	Air Handler
Refrigerant Type	R-454B

Documents

Air Conditioner:

Literature

Merit® – Air Conditioner Comparison Card – R-454B (37G25) (7/25)

Merit® – Air Conditioner Specification Chart – R-454B (37G45) (11/24)

Product Specifications

ML14KC1 (1.5-5 Ton) R-454 EHB

Installation Instructions

ML14KC1 (1.5-5 Ton) R-454 Instructions

Service Literature

ML14KC1 (1.5-5 Tons) R454B Service

User Manuals

Air Conditioner Homeowner Information User Manual

Warranties

Basic Limited Warranty – Merit

Air Handler:

Literature

2025 Refrigerant Transition Flyer – Coils/Air Handlers (31B45) (08/24)

Air Handler Comparison Card – R-454B (37G14) (08/24)

Merit® – Air Handler Specification Chart – R-454B (38A67) (08/24)

Product Specifications

CBK45UHET-71 (1.5-5 Ton) Constant Torque R-454 EHB

Installation Instructions

CBK45UHET-71 Air Handlers R-454 Instructions

Service Literature

CBK45UHET-71 (1.5-3.5 Ton) Constant Torque R-454 Service

Warranties

Basic Limited Warranty – Merit

Other Information

Understanding SEER vs SEER2

What is SEER?

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.

5 Ton – Single Stage All Electric System