Mitsubishi MLZ-KX18NL & SUZ-AA18NL 18,000 BTU 17.2 SEER2 One-Way Ceiling Cassette Heat Pump System (w/ Grille) - R454B

Mitsubishi MLZ-KX18NL & SUZ-AA18NL: 18,000 BTU One-Way Ceiling Cassette Heat Pump System

The Mitsubishi MLZ-KX18NL & SUZ-AA18NL is an 18,000 BTU high-performance heat pump system that pairs a sleek, one-way ceiling cassette indoor unit with a powerful and efficient outdoor unit. Ideal for larger residential rooms or light commercial spaces, the MLZ-KX18NL fits discreetly between standard ceiling joists, offering a space-saving solution with clean aesthetics. Paired with the SUZ-AA18NL, this system delivers quiet, energy-efficient heating and cooling year-round.

With advanced INVERTER-driven compressor technology, customizable horizontal airflow, and Wi-Fi-enabled smart controls, this system is engineered for comfort, flexibility, and efficiency in areas up to ~750 sq ft.

General Information

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

• Model Numbers: Indoor – MLZ-KX18NL / Outdoor – SUZ-AA18NL

• Capacity: 18,000 BTU Cooling / 20,000 BTU Heating

• Room Size: Ideal for spaces up to ~750 sq ft

• Operating Mode: Heating & Cooling

• Energy Star Certified: Yes

• Refrigerant: R454B (2 lb, 14.6 oz)

Key Features

INVERTER-Driven Compressor
Automatically adjusts output to maintain consistent indoor temperatures while improving efficiency and reducing noise.

Slim One-Way Ceiling Cassette Design
Mounts flush between 16" ceiling joists for unobtrusive installation with a modern look.

Quiet Operation
Low indoor and outdoor sound levels provide comfort without disruptive noise, ideal for bedrooms, offices, or living areas.

Customizable Horizontal Airflow
Delivers even distribution with adjustable vanes for directed comfort.

Blue Fin Anti-Corrosion Coating
Enhances durability and corrosion resistance of the outdoor unit, especially in humid or coastal environments.

Powerful Mode
Quickly reaches the desired temperature by temporarily boosting fan speed and compressor output.

Auto Restart Function
Automatically resumes previous settings after power outages.

Smart Control Ready
Compatible with the Mitsubishi Comfort app, wired and wireless remotes, and third-party smart systems.

Optional i-see Sensor
Available accessory that provides occupancy and temperature-based airflow adjustments.

Specifications

• Cooling Capacity: 16,400 BTU

• Heating Capacity: 19,000 BTU

• EER2: 11.7

• HSPF2: 10

• COP at 47°F: 3.1

• COP at 17°F: 2.6

• Voltage: 208/230V, 1-Phase, 60Hz

• Airflow Rate (Cooling/Heating): 212-417 CFM

• Piping: Gas – 1/2 in. / Liquid – 1/4 in.

Included Components

• Indoor Unit: MLZ-KX18NL

• Outdoor Unit: SUZ-AA18NL

• Grille: MLP-449WU

• Accessories: Hand-held Remote Controller

Optional Accessories

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

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

Ideal For:
Homeowners, remodelers, and business owners seeking an efficient, ceiling-mounted solution for larger single-zone spaces that combines style, quiet operation, smart control, and year-round comfort.