Mitsubishi MLZ-KX12NL & SUZ-AA12NLHZ 12,000 BTU 16.7 SEER2 One-Way Ceiling Cassette Hyper Heating Heat Pump System (w/ Grille) - R454B - MLZKX12NL/MLP449WU/SUZAA12NLHZ
The Mitsubishi MLZ-KX12NL & SUZ-AA12NLHZ is a powerful, 12,000 BTU 1-way ceiling cassette heat pump system built for discreet, high-efficiency comfort in residential and light commercial applications. With Hyper-Heating INVERTER(H2i) technology, it delivers full-rated heating at 5°F and reliable performance in temperatures as low as -13°F. The MLZ-KX12NL indoor cassette installs flush between standard 16" joists for a low-profile, grille-only ceiling appearance, while the SUZ-AA12NLHZ outdoor unit offers inverter-driven performance with Blue Fin coil protection for added durability.
Perfect for medium-sized rooms up to ~500 sq ft, this single-zone system delivers quiet operation, customizable airflow, energy savings, and smart control integration—all in a sleek, ceiling-mounted package.
Features
Hyper-Heating INVERTER(H2i) Technology
Full heating capacity at 5°F; dependable operation at -13°F outdoor temperatures.
EZ FIT Ceiling Installation
Slim indoor unit fits between 16" ceiling joists for a flush, low-profile appearance.
Built-in 19.6" Condensate Lift Pump
Simplifies drainage and ceiling installation.
Whisper-Quiet Operation
Indoor noise levels as low as 28 dB(A) for quiet comfort.
Blue Fin Coating
Protects outdoor coil from corrosion in harsh climates.
Advanced Filtration
Includes antibacterial and deodorizing washable filters.
Smart Comfort Control
Supports Mitsubishi’s Comfort app, handheld remote, and wired controller options.
Auto Vane & Hot-Start
Prevents drafts and delivers smooth, efficient air distribution.
What Our Experts Think
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12,000 BTU one-way ceiling cassette ideal for single-zone residential or light-commercial spaces.
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Hyper-Heating INVERTER (H2i) delivers full-rated heating at 5°F and reliable operation down to –13°F.
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Flush-mount design with grille-only appearance blends discreetly into ceilings.
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Blue Fin coil protection on the outdoor unit enhances durability and longevity.
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Energy-efficient system reduces utility costs while providing consistent comfort.
Q&A
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Q: What room size is suitable for this system?
A: Ideal for small to medium rooms requiring up to 12,000 BTU.
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Q: Can it operate efficiently in extreme cold?
A: Yes, Hyper-Heating technology maintains reliable heating down to –13°F.
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Q: Where can it be installed?
A: Ceiling-mounted flush between standard 16" joists for a low-profile look.
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Q: What refrigerant does it use?
A: R454B, a low-GWP, environmentally friendly refrigerant.
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 performance.
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Keep outdoor unit free of debris for optimal operation.
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Inspect ceiling unit and mounting periodically for stability.
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Ensure condensate drains remain clear to prevent water damage.
