Mitsubishi MSZ-GX18NL & MUZ-GX18NL 18,000 BTU 22.5 SEER2 Wall Mounted Heat Pump System - R454B

Mitsubishi MSZ-GX18NL & MUZ-GX18NL: 18,000 BTU Wall-Mounted Heat Pump System

The Mitsubishi MSZ-GX18NL indoor unit, paired with the MUZ-GX18NL outdoor condenser, delivers powerful and efficient 18,000 BTU heating and cooling in a single-zone ductless mini-split. Designed for rooms up to 750 sq ft, this system provides reliable, quiet comfort for larger living spaces, offices, or open floor plans.

Equipped with an INVERTER-driven compressor and environmentally friendly R-454B refrigerant, the system offers precise temperature control with high energy efficiency. The MSZ-GX18NL features a sleek, low-profile wall-mounted design with Dual Barrier and Blue Fin coatings that protect against dust, oil, and corrosion for enhanced durability and performance.

Whisper-quiet operation, built-in Wi-Fi compatibility for remote control via the Mitsubishi Comfort app, and washable electrostatic enzyme filters make the MSZ-GX18NL & MUZ-GX18NL a smart, low-maintenance solution for year-round comfort.

General Information
System Type: Wall-mounted ductless air handler + single-zone heat pump condenser
Models: Indoor – MSZ-GX18NL | Outdoor – MUZ-GX18NL
Capacities: 18,000 BTU Cooling | 21,600 BTU Heating
Room Size: Ideal for 750 sq ft
Operating Modes: Heating & Cooling
ENERGY STAR®: Yes
Refrigerant / Factory Charge: R-454B, 2.0 lb

Key Features

• INVERTER Technology: Variable-speed compressor for precise, energy-efficient performance

• All-Climate Heating: Reliable heat delivery down to 5 °F outdoor temperatures

• Space-Saving Design: Low-profile wall-mounted unit fits seamlessly into large rooms

• Quiet Operation: Indoor sound levels as low as 19 dB(A) for minimal noise disruption

• Washable Electrostatic Enzyme Filter: Improves indoor air quality with easy maintenance

• Built-In Wi-Fi: Remote system control via Mitsubishi Comfort app or compatible remotes

Specifications (Rated Conditions)
Cooling Capacity: 18,000 BTU | EER2: 14.05 | SEER2: 22.5
Heating Capacity @ 47 °F: 21,600 BTU | HSPF2: 10.3 | COP (47 °F): 3.77
Heating Capacity @ 5 °F: Up to 15,200 BTU
Electrical: 208/230 V, 1-Ph, 60 Hz | MCA: 12 A | MOCP: 20 A
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: 100 ft | Max height: 50 ft
Outdoor Dimensions / Weight: 33-1/16 x 13 x 34-5/8 in. | 116 lb
Drain Connection: ⅝ in. O.D.

Included Components

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

• Outdoor Unit: MUZ-GX18NL heat pump condenser

• Back-lit Hand-Held Remote Controller

Ideal For
Homeowners and contractors seeking a quiet, efficient ductless system for large rooms or open areas. The MSZ-GX18NL & MUZ-GX18NL provide dependable heating, effective cooling, and smart controls in a sleek, space-saving design.