Mitsubishi MSZ-JX09WL & MUZ-JX09WL 9,000 BTU 20 SEER Wall Mounted Heat Pump System - R454B

Mitsubishi MSZ‑JX09WL & MUZ‑JX09WL: 9,000 BTU Wall-Mounted Heat Pump System

The Mitsubishi MSZ‑JX09WL indoor unit, paired with the MUZ‑JX09WL outdoor condenser, delivers efficient 9,000 BTU heating and cooling in a compact, single-zone ductless mini-split system. Engineered for rooms up to 350 sq ft, this system features advanced inverter technology for reliable performance, maintaining warmth in low ambient temperatures down to -4°F.

This environmentally friendly system uses low-GWP R‑454B refrigerant and features a sleek, wall-mounted indoor unit with a washable air filter and whisper-quiet operation. Compatible with optional Wi-Fi controls via Mitsubishi’s Wireless LAN module and Comfort app, it provides flexible remote access and convenient temperature scheduling.

General Information
System Type: Wall-mounted ductless air handler + single-zone heat pump condenser
Models: Indoor – MSZ‑JX09WL | Outdoor – MUZ‑JX09WL
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, approx. 1.76 lb

Key Features

• INVERTER Technology: Precise, energy-efficient heating and cooling

• Cold-Climate Performance: Heating operation down to -4°F outdoor temperatures

• Compact Design: Slim indoor unit fits tight spaces and complements decor

• Quiet Operation: Indoor sound levels as low as 20 dB(A); outdoor unit quiet at 49 dB(A)

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

• Smart Controls: Optional wireless LAN module for Wi-Fi control via Kumo Cloud® app

Specifications (Rated Conditions)
Cooling Capacity: 9,000 BTU | EER2: 12.5 | SEER2: 20.0
Heating Capacity @ 47°F: 10900 BTU | HSPF2: 10 | COP (47°F): 3.55
Heating Capacity @ 17°F: 6,800 BTU
Electrical: 208/230 V, 1-Ph, 60 Hz | MCA: 8 A | MOCP: 15 A
Airflow (Dry): 146-384 CFM
Sound Pressure: Indoor 22-43 dB(A) | Outdoor 46-50 dB(A)
Piping: Liquid 1/4 in. | Gas 3/8 in. | Max line length: 66 ft | Max height: 49 ft
Outdoor Dimensions / Weight: 31-1/2 x 11-1/4 x 21-5/8 in. | 68 lb
Drain Connection: 5/8 in. O.D.

Included Components

• Indoor Unit: MSZ‑JX09WL wall-mounted air handler

• Outdoor Unit: MUZ‑JX09WL inverter heat pump condenser

• Hand-Held Remote Controller

Ideal For
Homeowners and contractors seeking a high-efficiency, compact heat pump system for year-round comfort in bedrooms, offices, or smaller living spaces. The MSZ‑JX09WL & MUZ‑JX09WL system offers quiet operation, smart control compatibility, and reliable heating even in colder climates.