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- 3 ton - best for spaces between 1500 - 1800 sq ft depending on your home's insulation and your climate
- SEER2 rating helps consumers compare energy efficiency when choosing a new air conditioner. Higher SEER2 ratings mean significant utility savings. The federal minimum is 14 SEER2 with ratings into the 20 SEER2 range. A 20 SEER2 uses half the energy of a 10 seer much like MPG ratings for vehicles.
- Heat pumps are all electric and good for mild and cold climates.
- If you have an indoor furnace, or air handler, along with an outdoor AC unit, this system will serve as a replacement for both.
Lennox Merit 3 Ton 14.3 SEER2 Heat Pump System - R454B
- Condenser: ML14KP1-036-230
- Air Handler: CBK45UHPT-036
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- 3 ton - best for spaces between 1500 - 1800 sq ft depending on your home's insulation and your climate
- SEER2 rating helps consumers compare energy efficiency when choosing a new air conditioner. Higher SEER2 ratings mean significant utility savings. The federal minimum is 14 SEER2 with ratings into the 20 SEER2 range. A 20 SEER2 uses half the energy of a 10 seer much like MPG ratings for vehicles.
- Heat pumps are all electric and good for mild and cold climates.
- If you have an indoor furnace, or air handler, along with an outdoor AC unit, this system will serve as a replacement for both.
Lennox Merit 3 Ton Split System Heat Pump Condenser - Up to 17 SEER2, R454B
Model Number
ML14KP1-036-230
Dimensions
32-1/4" W x 32-1/4" D x 33-1/4" H
Documents
ML14KP1-036-230 Specifications
Warranty
Parts: 5 years
Lennox Merit 3 Ton Upflow/Horizontal Air Handler - Quantum Coil, Factory-Installed TXV, R454B
Model Number
CBK45UHPT-036
Dimensions
21-1/2" W x 22" D x 53-5/8" H
Documents
Warranty
Parts: 5 years
Heat Kit Options
AHRI Number
215735588
Dependable Home Comfort Built Around Lennox Technology
The Lennox Merit ML14KP1-036-230 3 Ton Heat Pump Condenser provides an efficient way to heat and cool your home using one outdoor system. Its single-stage design combines reliable operation with Lennox technologies engineered for durability, efficiency, and everyday comfort.
This 3-ton heat pump is part of the ML14KP1 family, capable of reaching up to 17 SEER2 and 8.2 HSPF2 when paired with qualifying indoor equipment.
Key Features
- 3 Ton Heat Pump – Provides both heating and cooling for compatible residential systems.
- Up to 17 SEER2 / 8.2 HSPF2 – Designed for efficient year-round operation with qualifying system matches.
- R-454B Refrigerant – Lower-GWP refrigerant designed for today's HVAC systems.
- Single-Stage Scroll Compressor – Delivers dependable, consistent operation.
- Factory-Installed Crankcase Heater – Helps prevent liquid refrigerant migration into the compressor.
- Quantum™ Coil – Corrosion-resistant aluminum construction for reliable performance.
- Durable Outdoor Cabinet – Heavy-gauge steel construction protects critical components.
Quantum™ Coil Technology
The Lennox-designed Quantum™ Coil uses enhanced aluminum alloy tubing and fins to provide excellent corrosion resistance while maintaining effective heat transfer. The entire coil is also accessible for cleaning, helping support proper maintenance over the life of the equipment.
Reliable Single-Stage Scroll Compressor
Lennox's scroll compressor provides uniform refrigerant flow and efficient single-stage operation. Low gas pulses, a discharge-line muffler, and resilient rubber mounting work together to help limit operating sound and vibration. The 3-ton model also includes a factory-installed compressor crankcase heater to help prevent liquid refrigerant migration and maintain proper compressor lubrication.
Lower-GWP R-454B Refrigerant
The ML14KP1 uses R-454B refrigerant, which offers lower global warming potential and zero ozone depletion potential. R-454B systems require compatible indoor equipment with a refrigerant detection system designed to detect refrigerant and initiate mitigation measures when necessary.
Durable Merit® Series Construction
A heavy-gauge steel cabinet, powder-painted finish, louvered panels, and zinc-coated base help protect the ML14KP1 from outdoor conditions. Refrigerant connections, electrical inlets, and service valves are grouped together for convenient installation and service access.
Bring Lennox reliability home with the ML14KP1-036-230. Pair this 3-ton heat pump condenser with compatible indoor equipment for efficient heating and cooling throughout the year.
Reliable Indoor Airflow Built for Installation Flexibility
Build a dependable home comfort system around the Lennox Merit CBK45UHPT-036 3 Ton Air Handler. Designed for compatible R-454B air conditioners and heat pumps, this indoor unit delivers flexible installation, selectable blower speeds, and reliable heat-transfer performance through Lennox Quantum™ Coil technology.
The CBK45UHPT-036 provides a nominal 3-ton capacity and can be installed in upflow or horizontal configurations. Factory-installed refrigerant-management and detection components help prepare the air handler for use in today's R-454B residential HVAC systems.
Key Features
- 3 Ton Air Handler – Designed for properly matched residential split systems.
- Upflow/Horizontal Capability – Accommodates several common equipment-room and attic layouts.
- Quantum™ Coil Technology – Supports reliable heat transfer with corrosion-resistant aluminum construction.
- Factory-Installed TXV – Precisely controls refrigerant flow through the indoor coil.
- Multi-Speed PSC Blower Motor – Provides selectable airflow for proper system setup.
- Integrated R-454B Detection Components – Help support safe operation of the complete system.
- Anti-Microbial Drain Pans – Resist mold and mildew growth while helping reduce drain-line blockage.
Quantum™ Coil Technology
The Lennox-designed Quantum™ Coil features an enhanced aluminum alloy tube-and-fin design engineered for superior corrosion resistance. Its large A-shaped surface area and precisely designed refrigerant circuits promote uniform refrigerant distribution, low air resistance, and effective heat transfer.
Dependable Multi-Speed Airflow
A multi-speed PSC blower motor allows airflow to be configured for the matched indoor and outdoor equipment. The blower can be removed from the cabinet for service, while a time-delay relay manages blower operation during cooling and continuous-fan cycles.
R-454B System Compatibility
The CBK45UHPT-036 includes a factory-installed R-454B check and expansion valve. It also incorporates a refrigerant detection sensor and blower control board that can stop heating or compressor operation and activate the blower if refrigerant is detected.
Durable and Adaptable Cabinet Design
A heavy-gauge galvanized steel cabinet protects the internal components and is fully insulated with foil-faced fiberglass insulation. The air handler ships for upflow or horizontal right-hand discharge and can be adapted for horizontal left-hand airflow. An optional conversion kit is required for downflow installations.
Choose the Lennox Merit CBK45UHPT-036 for dependable 3-ton indoor comfort, flexible equipment placement, and compatibility with properly matched R-454B HVAC systems.
Optional Electric Heat for Added Cold-Weather Comfort
Customize your Lennox heat pump system with an optional electric heat kit for additional heating support when outdoor temperatures drop. Installed inside the compatible Lennox CBK45 Series air handler, the heat kit provides electric resistance heat that works with the air handler's blower to distribute warm air through your home's existing duct system.
Available heat-kit capacities vary by the selected system and air handler, allowing the equipment to be matched to the home's heating requirements and available electrical service. Compatible configurations may be available with or without factory-mounted circuit breakers.
Electric Heat Kit Benefits
- Supplemental Heating – Adds an additional source of heat when the heat pump requires assistance during colder weather.
- Multiple Heating Capacities – Select systems are available with electric heat options ranging from 4 kW to 15 kW, depending on equipment compatibility.
- 208-230V Single-Phase Operation – Designed for compatible residential electrical applications.
- Responsive Heat Transfer – Helix-wound nichrome heating elements are positioned directly in the airflow to efficiently transfer heat into the moving air.
- Built-In Temperature Protection – Limit controls help protect the heating elements against excessive operating temperatures.
- Factory-Assembled Controls – Heat-kit controls and components are assembled and wired for installation inside the compatible air handler.
- Breaker and Non-Breaker Options – Depending on the selected capacity and system configuration, heat kits may be available with factory-mounted circuit protection or a terminal-block connection.
Choose the Right Heat Kit for Your Home
The correct electric heat kit should not be selected by system tonnage alone. Heating requirements, air-handler compatibility, airflow, supply voltage, available electrical service, wire sizing, circuit protection, and local electrical-code requirements should all be considered when selecting an electric heat option.
Select an available electric heat kit when configuring your system to add dependable supplemental heating for colder conditions. Final equipment compatibility and electrical requirements must be verified by a qualified HVAC or electrical professional.
Who installs the AC unit after I purchase it?
ACDirect does not yet provide installation services directly. However, most of our customers successfully arrange installation through local licensed HVAC contractors. These systems are designed for professional installation and typically include the components your installer will need.
Here’s how it works:
- Hire a licensed HVAC technician in your area
- Use platforms like Angi, Thumbtack, or a local HVAC directory to find reliable professionals
- Confirm your installer is experienced with the system type you’re purchasing
Note:
Please be aware if you choose to install HVAC equipment yourself and don’t possess proper HVAC licensing, you will void the manufacturer’s factory warranty. If you are capable of a factory-compliant installation yourself, you will need a licensed HVAC contractor to sign off on your work, fully confirming factory-compliant workmanship.
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