Mitsubishi MSZ-GX18NL & MUZ-GX18NLHZ 18,000 BTU 22.5 SEER2 Wall Mounted Hyper-Heating H2i® System - R454B

Mitsubishi MSZ‑GX18NL & MUZ‑GX18NLHZ: 18,000 BTU Wall‑Mounted Hyper Heat Pump System

The Mitsubishi MSZ‑GX18NL, paired with the MUZ‑GX18NLHZ outdoor unit, delivers powerful, energy-efficient heating and cooling in an 18,000 BTU ductless mini-split system. Designed for larger rooms up to 750 sq ft, this single-zone heat pump is perfect for open-plan living areas, large bedrooms, or finished basements where comfort and quiet operation are a must.

Equipped with advanced INVERTER-driven compressor technology and eco-friendly R‑454B refrigerant, the system ensures precise temperature control and low energy consumption. The MSZ indoor unit features a slim, wall-mounted design that integrates seamlessly into your space, while the MUZ condenser incorporates Hyper‑Heat technology for dependable performance in frigid temperatures.

With ultra-quiet sound levels, built-in Wi-Fi for remote control, and a washable air filter for easy maintenance, the MSZ‑GX18NL & MUZ‑GX18NLHZ is a versatile and effective solution for large residential applications.

General Information
System Type: Wall-mounted ductless air handler + single-zone hyper heat pump condenser
Models: Indoor – MSZ‑GX18NL | Outdoor – MUZ‑GX18NLHZ
Capacities: 22,000 Cooling | 27,400 Heating
Room Size: Ideal for 750 sq ft
Operating Modes: Heating & Cooling
ENERGY STAR®: Yes
Refrigerant / Factory Charge: R‑454B, 2.20 lb

Key Features

• INVERTER Technology : Energy-saving, variable-speed compressor

• Hyper‑Heat Cold Climate Performance : Reliable heating down to -13°F

• Space‑Saving Design : Low-profile wall unit fits large rooms with ease

• Quiet Operation : Indoor sound levels as low as 20 dB(A)

• Washable Filter : Reusable, easy-to-clean air filtration

• Built-In Wi-Fi : Remote control via Mitsubishi Comfort app

Specifications (Rated Conditions)
Cooling Capacity: 22,000 | EER2: 14.05 | SEER2: 22.5
Heating Capacity @ 47°F: 27,400 | HSPF2: 10 | COP (47°F): 4.16
Heating Capacity @ 5°F: Up to 19,000
Electrical: 208/230 V, 1-Ph, 60 Hz 
Airflow (Dry): 292-672 CFM (cool & heat)
Sound Pressure: Indoor 28–49 dB(A) | Outdoor 54-55 dB(A)
Piping: Liquid 1/4 in. | Gas 1/2 in. | Max line length: 65 ft | Max height: 40 ft
Outdoor Dimensions / Weight: 33-1/16 x 13 x 34-5/8 in. | 117 lb
Drain Connection: 5/8 in. O.D.

Included Components

• Indoor Unit : MSZ‑GX18NL wall-mounted ductless air handler

• Outdoor Unit : MUZ‑GX18NLHZ Hyper‑Heat heat pump condenser

Ideal For
Homeowners and contractors seeking a high-performance ductless solution for large rooms. The MSZ‑GX18NL & MUZ‑GX18NLHZ system offers smart control, cold-climate reliability, and year-round comfort in a sleek, efficient design.