Mitsubishi MLZ-KX18NL & SUZ-AA18NLHZ 18,000 BTU 17.2 SEER2 One-Way Ceiling Cassette Hyper Heating Heat Pump System (w/ Grille) - R454B - MLZKX18NL/MLP449WU/SUZAA18NLHZ
The Mitsubishi MLZ-KX18NL & SUZ-AA18NLHZ is a high-capacity, 18,000 BTU 1-way ceiling cassette heat pump system engineered for reliable year-round performance and discreet ceiling installation. With advanced Hyper-Heating INVERTER(H2i) technology, it provides full-rated heating at 5°F and dependable operation in outdoor temperatures as low as -13°F. The MLZ-KX18NL indoor unit installs flush between standard ceiling joists for a low-profile appearance, while the SUZ-AA18NLHZ outdoor unit features Blue Fin coil protection and inverter-driven efficiency for superior durability and performance.
Perfect for large spaces up to ~750 sq ft, this single-zone system delivers quiet comfort, customizable airflow, and smart control options—all in a compact, ceiling-mounted design.
Features
Hyper-Heating INVERTER(H2i) Technology
Delivers full heating at 5°F and maintains operation at -13°F outdoor temperatures.
EZ FIT Ceiling Installation
Slim cassette fits between standard 16" ceiling joists for seamless, grille-only visibility.
Built-in Condensate Lift Pump
19.6" vertical lift simplifies installation and drainage.
Quiet Comfort
Indoor sound levels as low as 30 dB(A), perfect for bedrooms, offices, and living rooms.
Blue Fin Protection
Coating on outdoor coils defends against corrosion in coastal and humid environments.
Advanced Filtration
Washable antibacterial and deodorizing filters improve air quality.
Smart Comfort Control
Compatible with Mitsubishi Comfort App, IR remote, and wired wall controllers.
Hot-Start & Auto Vane
Prevents cold drafts and ensures even air distribution.
What Our Experts Think
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18,000 BTU one-way ceiling cassette ideal for single-zone spaces needing discreet installation.
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Hyper-Heating INVERTER (H2i) ensures full-rated heating at 5°F and reliable operation down to –13°F.
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Flush-mount design integrates seamlessly into ceilings with a low-profile grille.
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Blue Fin coil protection on the outdoor unit enhances durability and longevity.
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Energy-efficient operation suitable for residential and light-commercial spaces.
Q&A
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Q: What room size is suitable for this system?
A: Ideal for medium rooms or spaces requiring up to 18,000 BTU.
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Q: Can it heat efficiently in extreme cold?
A: Yes, Hyper-Heating INVERTER technology maintains performance down to –13°F.
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Q: Where can it be installed?
A: Ceiling-mounted flush between standard joists for a discreet appearance.
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Q: What refrigerant does it use?
A: R454B, a low-GWP, eco-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 clear of debris and obstructions.
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Inspect ceiling unit and mounting periodically for stability.
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Ensure condensate drains remain unobstructed to prevent water damage.
