Mitsubishi MLZ-KX12NL & SUZ-AA12NL 12,000 BTU 20.7 SEER2 One-Way Ceiling Cassette Heat Pump System (w/ Grille) - R454B

Mitsubishi MLZ-KX12NL & SUZ-AA12NL: 12,000 BTU One-Way Ceiling Cassette Heat Pump System

The Mitsubishi MLZ-KX12NL & SUZ-AA12NL is a premium 12,000 BTU heat pump system featuring a slim, one-way ceiling cassette indoor unit designed for discrete, space-saving installation. Ideal for rooms with limited wall space or for aesthetic preferences, the MLZ-KX12NL mounts flush between standard ceiling joists and blends into the ceiling with a sleek grille. Paired with the SUZ-AA12NL outdoor unit, this system delivers consistent, energy-efficient heating and cooling using INVERTER-driven compressor technology and environmentally friendly R454B refrigerant.

Engineered for quiet, year-round comfort in residential or light commercial spaces up to ~500 sq ft, the MLZ-KX12NL system offers advanced features such as customizable airflow direction, smart control compatibility, and corrosion-resistant components for long-lasting performance.

General Information

• System Type: One-Way Ceiling Cassette Heat Pump System

• Model Numbers: Indoor – MLZ-KX12NL / Outdoor – SUZ-AA12NL

• Capacity: 11,300 BTU Cooling / 14,600 BTU Heating

• Room Size: Ideal for spaces up to ~500 sq ft

• Operating Mode: Heating & Cooling

• Energy Star Certified: Yes

• Refrigerant: R454B (1 lb, 11.83 oz)

Key Features

INVERTER-Driven Compressor
Provides precise temperature control while reducing energy consumption and wear on the system.

Slim One-Way Ceiling Cassette Design
Fits between 16" ceiling joists, allowing for seamless, unobtrusive installation in tight or retrofit spaces.

Quiet Operation
Whisper-quiet indoor performance and low-noise outdoor unit operation make it suitable for bedrooms, offices, or shared spaces.

Horizontal Airflow with Adjustable Vane
Delivers even, comfortable air distribution across the room with user-selectable direction settings.

Blue Fin Anti-Corrosion Coating
Protects the outdoor heat exchanger from corrosion, extending the life of the unit in harsh environments.

Powerful Mode
Boosts compressor and fan speed for rapid room conditioning when quick heating or cooling is needed.

Auto Restart Function
Automatically resumes operation with previous settings after power loss.

Wi-Fi & Smart Home Compatibility
Control system settings from anywhere via the Mitsubishi Comfort app or integrate with wired remotes and third-party systems.

Optional i-see Sensor
Available sensor accessory detects occupancy and adjusts comfort settings accordingly.

Specifications

• Cooling Capacity: 11,300 BTU

• Heating Capacity: 14,600 BTU

• EER2: 11.8

• HSPF2: 10

• COP at 47°F: 3.2

• COP at 17°F: 2.6

• Voltage: 208/230V, 1-Phase, 60Hz

• Airflow Rate (Cooling/Heating): 529 / 588 CFM

• Piping: Gas – 3/8 in. / Liquid – 1/4 in.

Included Components

• Indoor Unit: MLZ-KX12NL

• Outdoor Unit: SUZ-AA12NL

• Accessories: Hand-held Remote Controller

Optional Accessories

• Indoor Unit: Wi-Fi Interface, Wired Remote Controller, i-see Sensor, Decorative Grille Panel

• Outdoor Unit: Drain Socket, Wind Baffle, Wall-Mounting Bracket

Ideal For:
Homeowners, designers, and businesses seeking a sleek, ceiling-mounted heat pump system that offers energy-efficient performance, modern controls, and quiet operation for spaces up to 500 sq ft