$8,840.00Original price was: $8,840.00.$8,594.00Current price is: $8,594.00.
3.5 Ton – Single Stage All Electric System
The Merit® Series 3.5 Ton Single Stage All Electric System is a complete home comfort solution, including the ML14KC1-042 air conditioner, CBK45UHPT air handler, and ECB45-15CB-P electric heat kit. Enjoy reliable, energy-efficient heating and cooling with advanced safety features and fully 2025-compliant R-454B refrigerant.
Key Benefits
✅ 3.5 Ton single-stage system for year-round comfort ✅ SEER2 14.7 and EER2 12.2 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 with the 3.5 Ton Single Stage All Electric System. This complete bundle includes the ML14KC1-042 air conditioner, CBK45UHPT-042-71 air handler, and ECB45-15CB-P electric heat kit, delivering reliable, energy-efficient year-round comfort while meeting 2025 R-454B refrigerant standards.
AHRI#:215583843
SEER2: 14.7 EER2:12.2
SEER2: 14.7 & EER2: 12.2 Ratings
With a SEER2 of 14.7 and EER2 of 12.2, this 3.5 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: ML14KC1-042
The ML14KC1-042 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: ECB45-15CB-P
The ECB45-15CB-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 3.5 Ton Single Stage All Electric System?
This system is ideal 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
✅ 3.5 Ton single-stage system for year-round comfort ✅ SEER2 14.7 and EER2 12.2 for efficient performance ✅ Quiet operation with sound levels as low as 73 dB ✅ Complete bundle with air conditioner, air handler, and electric heat kit ✅ Built-in Refrigerant Detection System (RDS) for added safety ✅ Fully 2025-compliant system with eco-friendly R-454B refrigerant
Air Conditioner Overview
Model #: ML14KC1-042
Product Overview:
Merit® Series | ML14KC1 Air Conditioner – Standard-Efficiency, Future-Ready Cooling
The Merit® Series ML14KC1 is a standard-efficiency air conditioner unit designed to provide reliable performance and energy-efficient air conditioning for your home. Compatible with 2025 Compliant Refrigerant, this unit ensures both comfort and environmental responsibility while meeting the latest EPA and industry standards. Homeowners looking for dependable heating and cooling units or a full central air conditioning system will find the ML14KC1 a practical, efficient choice.
Energy Efficiency & Performance
This unit meets or exceeds a 14.30 SEER2 efficiency rating, making it an excellent air conditioner for sale that can reduce energy costs. Additionally, it is ENERGY STAR® Certified—meeting or 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 exceptional heat transfer and low air resistance, while the single-stage compressor operates at full capacity when needed, delivering dependable home air conditioner performance.
Quiet & Comfortable Operation
The ML14KC1 operates at sound levels as low as 73 dB, providing a quieter home environment. Its precision-balanced, direct-drive outdoor fan further reduces noise while extending the product’s lifespan. This makes it an ideal air conditioning unit for homes seeking a comfortable, low-noise solution.
Craftsmanship & Reliability
The exclusive Quantum™ Coil, made from durable aluminum alloy, is engineered to withstand harsh weather conditions. Additionally, the heavy-gauge, galvanized steel cabinet with louver coil guard, zinc-coated steel base, and baked-on powder finish provides long-lasting durability. Braze-free installation ensures flexibility for 2025 compliant systems, while built-in drainage holes prevent moisture accumulation, enhancing the reliability of your heating and air conditioning units.
Safety & Sustainability
This system uses R-454B refrigerant, compliant with 2025 EPA lower-GWP standards. It also features a built-in Refrigerant Detection System (RDS) for A2L refrigerant safety compliance, which detects leaks, stops operation, and activates the indoor blower to safely disperse refrigerant. As a result, this air conditioning system replacement ensures both safety and environmental responsibility.
Complete Comfort System Option
For year-round comfort, the ML14KC1 Air Conditioner can be paired with a compatible Lennox® furnace and evaporator coil to form a full central air AC unit. This combination delivers efficient, safe, and reliable heating and cooling units for your home.
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
25C93
Model/Part Number
ML14KC1-042-230
Base Unit of Measure
Unit(S)
Family
ML14KC1
Series
Merit
Type
Single-Stage Air Conditioner
Nominal Cooling Capacity
3.5 Ton
Product Voltage
208-230 VAC 1 Ph 60Hz
Product Width
32.7 Inch
Product Height
33.1 Inch
Compressor Type
1 Stage
Number of Compressors
1 Compressor
SEER2
Meets or exceeds 14.30 SEER2
Gross Weight
225.0 Lbs
Liquid Line OD
3/8 Inch
Suction Line OD
7/8 Inch
Energy Star Certified
Yes
Refrigerant Type
R-454B
Product Length
32.7 Inch
Heat Kit Overview
Model #ECB45-15CB
Product Overview
Lennox ECB45 Electric Heat Kits
ETL certified for safety and compliance.
Designed for field installation inside the unit cabinet.
Offered in multiple voltage and kilowatt options—refer to the specific Air Handler Tables for details.
Utilizes helix-wound nichrome heating elements positioned directly in the airstream, allowing for immediate heat transfer, reduced element temperatures, and extended lifespan.
Each element includes a precisely placed limit control with a fixed shut-off temperature and automatic reset functionality.
A secondary thermal cutoff limit control provides added protection in the event of high temperature conditions.
Control box and access panel are constructed from heavy-duty galvanized steel for enhanced durability.
Delivered factory-assembled with all controls pre-installed and pre-wired.
Low voltage electric heat controls connect to the air handler via a simple plug-in connection.
Circuit Breaker Models (CB)
All “CB” models include built-in circuit breakers for protection against overloads and short circuits.
Circuit breakers are factory-installed and pre-wired within the electric heat unit.
They are both current-sensitive and temperature-activated.
Include manual reset capability.
In many jurisdictions, these circuit breakers are recognized as a valid disconnecting means, removing the need for a separate field-installed disconnect switch.
Always refer to your local electrical code for installation requirements and compliance.
Brand
Lennox
Catalog Number
27A17
Model/Part Number
ECB45-15CB-P
Base Unit of Measure
Unit(S)
EAN / UPC
66255160140
Product Voltage
208/240v 1ph 60 hz
Gross Weight
5.25 LB
Family
ECB45
Heating Capacity
15 kW
Type
Electric Heat Kit with Circuit Breaker
Series
ECB45
Additional Information
(1) 60 Amp & (1) 25 Amp Circuit Breaker
For Use With
CBK45 & CBA25 Series Air Handlers
Product Width
11.5 Inch
Product Height
7.0 Inch
Product Depth
21.5 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.
