Mitsubishi MFZ-KX18NL & SUZ-AA18NLHZ 18,000 BTU 17.2 SEER2 Hyper Heat Floor-Mounted System - R454B

Mitsubishi MFZ-KX18NL & SUZ-AA18NLHZ: 18,000 BTU Floor-Mounted Hyper-Heating Heat Pump System

The Mitsubishi MFZ-KX18NL & SUZ-AA18NLHZ is a robust, 18,000 BTU floor-mounted heat pump system engineered to provide reliable, year-round comfort in residential and light commercial spaces. Utilizing advanced Hyper-Heating INVERTER® (H2i®) technology, it delivers consistent heating down to 5°F and dependable operation even at outdoor temperatures as low as -13°F. The stylish MFZ-KX18NL indoor unit supports flexible installation—floor, slightly elevated, or recessed mounting—while the SUZ-AA18NLHZ outdoor unit boasts corrosion-resistant Blue Fin coating and efficient inverter-driven performance.

Ideal for larger rooms up to ~750 sq ft, this single-zone system offers ultra-quiet operation, smart connectivity options including Wi-Fi control, and energy-efficient heating and cooling in a compact footprint.

General Information

System Type: Floor-Mounted Indoor Unit + Hyper-Heating Outdoor Unit
Model Numbers: Indoor – MFZ-KX18NL / Outdoor – SUZ-AA18NLHZ
Capacity: 18,000 BTU Cooling / 21,600 BTU Hyper-Heating
Ideal Room Size: ~750 sq ft
Operating Mode: Heating & Cooling
Energy Star Certified: Yes
Refrigerant: R454B (2 lb, 12.4 oz)

Key Features

Hyper-Heating INVERTER® (H2i®) Technology
Full heating capacity at 5°F, reliable down to -13°F outdoor temperatures.

Flexible Installation
Mounts on floor, slightly elevated, or recessed for design flexibility.

Whisper-Quiet Operation
Indoor noise levels as low as 21 dB—great for bedrooms and offices.

Blue Fin Coating
Protects outdoor coil from corrosion in harsh environments.

Advanced Filtration
Nano Platinum Filter neutralizes odors and captures airborne particles.

Smart Comfort Control
Compatible with Mitsubishi Electric’s Comfort app, remotes, and wired controllers.

Econo Cool & Powerful Modes
Energy-saving and rapid temperature adjustment options.

Grooved Piping & Multi-Flow Vane
Boosts heat exchange efficiency and improves airflow distribution.

Hot-Start Technology
Eliminates cold drafts by warming air only when the heat exchanger is ready.

Specifications

Cooling Capacity: 18,000 BTU (Range: 5,200–18,000 BTU)
Heating Capacity: 20,000 BTU (Range: 5,200–26,300 BTU)
EER2: 12.4
HSPF2: 9.9
COP @ 47°F: 3.4
COP @ 17°F: 2
Voltage: 208/230V, 1-Phase, 60Hz
Airflow Rate: 1,573 CFM (Cooling/Heating)
Piping: 3/8 in. (Gas) / 1/4 in. (Liquid)

Included Components

• Indoor Unit: MFZ-KX18NL

• Outdoor Unit: SUZ-AA18NLHZ

• Controller: Hand-held Remote

Optional Accessories

Indoor Unit: Wi-Fi Interface, Wired Wall Controller, Enhanced Air Filter, Base Heater
Outdoor Unit: Drain Socket, Air Outlet Guide, Wall-Mount Bracket

Ideal For:
Homeowners and businesses in cold climates needing a quiet, powerful, and efficient floor-mounted heat pump system with smart controls and durable performance for spaces up to 750 sq ft