Mitsubishi MLZ-KX12NL & SUZ-AA12NL 12,000 BTU 20.7 SEER2 One-Way Ceiling Cassette Heat Pump System (w/ Grille) - R454B - MLZKX12NL/MLP449WU/SUZAA12NL
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.
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.
What Our Experts Think
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12,000 BTU one-way ceiling cassette ideal for single-zone spaces with limited wall area.
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Slim, flush-mount design integrates seamlessly into ceilings with a sleek grille.
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INVERTER-driven compressor ensures energy-efficient, year-round heating and cooling.
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Quiet operation suitable for bedrooms, offices, or aesthetic-conscious spaces.
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Uses eco-friendly R454B refrigerant for environmentally responsible performance.
Q&A
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Q: What size area is suitable for this system?
A: Ideal for small to medium rooms up to ~600–700 sq ft.
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Q: Can it be installed in limited wall space?
A: Yes, ceiling-mounted design is perfect where wall space is minimal.
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Q: Is it energy efficient?
A: Yes, INVERTER technology optimizes energy usage for heating and cooling.
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Q: What refrigerant does it use?
A: R454B, a low-GWP, environmentally friendly option.
Maintenance Tips
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Clean or replace filters monthly to maintain airflow and efficiency.
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Schedule annual professional maintenance for refrigerant levels and system performance.
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Keep outdoor unit clear of debris for optimal operation.
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Inspect ceiling unit and mounting periodically for stability.
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Ensure condensate drainage remains unobstructed to prevent water damage.
