Mitsubishi MSZ-WX09NL & MUZ-WX09NL 9,000 BTU 18 SEER2 Wall Mounted Heat Pump System - R454B

Mitsubishi MSZ-WX09NL & MUZ-WX09NL: 9,000 BTU Wall-Mounted Heat Pump System

The Mitsubishi MSZ-WX09NL indoor unit, paired with the MUZ-WX09NL outdoor condenser, delivers efficient 9,000 BTU heating and cooling in a sleek, single-zone ductless mini-split. Designed for rooms up to 350 sq ft, this system combines heating technology with INVERTER-driven precision for reliable year-round comfort, even in cold climates.

Equipped with eco-friendly R-454B refrigerant, the system offers whisper-quiet operation, advanced filtration, and smart control capabilities. The slim, low-profile indoor unit fits unobtrusively on walls, while the MUZ condenser ensures dependable heating performance down to -4°F outdoor temperatures.

General Information
System Type: Wall-mounted ductless air handler + single-zone heat pump condenser
Models: Indoor – MSZ-WX09NL | Outdoor – MUZ-WX09NL
Capacities: 9,000 BTU Cooling | 10,900 BTU Heating
Room Size: Ideal for 350 sq ft
Operating Modes: Heating & Cooling
ENERGY STAR®: Yes
Refrigerant / Factory Charge: R-454B, 1.54 lb

Key Features

• INVERTER Technology: Delivers precise, energy-efficient heating and cooling

• Hyper Heat Performance: Reliable heating down to -13°F outdoor temperatures

• Compact Design: Slim wall-mounted indoor unit fits small spaces

• Quiet Operation: Indoor sound as low as 20 dB(A) for minimal disruption

• Washable Filter: Easy maintenance with reusable air filter

• Smart Control Ready: Compatible with wired/wireless controllers and Comfort app

Specifications (Rated Conditions)
Cooling Capacity: 9,000 BTU | EER2: 11 | SEER2: 18
Heating Capacity @ 47°F: 10,900 BTU | HSPF2: 8.5 | COP (47°F): 3.55
Heating Capacity @ 17°F: 6,800 BTU
Electrical: 208/230 V, 1-Ph, 60 Hz | MCA: 7 A | MOCP: 15 A
Airflow (Dry): 147-391 CFM
Sound Pressure: Indoor 22–43 dB(A) | Outdoor 48-50 dB(A)
Piping: Liquid 1/4 in. | Gas 3/8 in. | Max line length 65 ft | Max height 40 ft
Outdoor Dimensions / Weight: 31-1/2 x 11-1/4 x 21-5/8 in. | 20 lb
Drain Connection: 5/8 in. O.D.

Included Components

• Indoor Unit: MSZ-WX09NL wall-mounted air handler

• Outdoor Unit: MUZ-WX09NL Hyper Heat heat pump condenser

• Remote Controller

Ideal For
Homeowners and contractors seeking a compact, energy-efficient heat pump system for small to medium rooms. The MSZ-WX09NL & MUZ-WX09NL provide dependable year-round comfort with quiet operation and smart control.