Mitsubishi 9,000 BTU HX-Series 20 SEER2 Single Zone Wall Mount Mini Split Heat Pump System - R454B | 230V

Mitsubishi HX-Series 9K BTU Single-Zone Ductless Mini Split Heat Pump

Efficient, quiet comfort for one room or small open area. This Mitsubishi HX-Series ductless mini split pairs the MUZ-HX09NL outdoor heat pump with the MSZ-HX09NL wall-mounted indoor unit for dependable heating and cooling without adding ductwork.

With 9,000 BTU of rated cooling, 10,900 BTU of rated heating, and 20.0 SEER2 efficiency, this system is a strong fit for bedrooms, home offices, nurseries, small additions, sunrooms, and other spaces where comfort needs to be controlled separately from the rest of the home.

Not sure if 9K is the right size? Confirm your room load, insulation, sun exposure, and installation plan before ordering so the system is matched correctly to the space.

Currently only available in GA, TN, OH, IN, and KY

At a Glance:

Best For	One-room heating and cooling with a quiet wall-mounted indoor unit
System Models	MUZ-HX09NL outdoor unit + MSZ-HX09NL indoor unit
Capacity	9,000 BTU cooling / 10,900 BTU heating
Efficiency	20.0 SEER2 / 12.5 EER2 / 10.0 HSPF2
Low-Temperature Heating Capacity	7,700 BTU at 5F
Voltage	208/230V, 1 phase
Refrigerant	R-454B
Installation Type	Professional HVAC installation recommended

Why Choose This Mitsubishi 9K System?

• Single-room comfort: Heat and cool one bedroom, office, addition, or other dedicated space without tying the room to a central duct system.
• Efficient inverter performance: Mitsubishi inverter technology adjusts output as conditions change, helping maintain steadier comfort than basic on/off systems.
• Year-round heat pump operation: Provides both cooling and heating from the same system, with 7,700 BTU of rated heating capacity at 5F.
• Quiet wall-mounted design: The compact indoor unit mounts high on the wall to distribute air through the room while keeping floor space open.
• Modern R-454B refrigerant: Built for Mitsubishi's current R-454B equipment generation.
• Warranty confidence: Mitsubishi lists a 10-year parts and compressor limited warranty when eligible equipment is registered within 90 days, subject to warranty terms.

What Is Included?

• 1 Mitsubishi MUZ-HX09NL outdoor heat pump condenser
• 1 Mitsubishi MSZ-HX09NL wall-mounted indoor air handler
• Wireless remote control capability for the indoor unit

Before You Order:

• Have your installer confirm the room load and that a 9K system is appropriate for the space.
• Confirm line-set length, indoor and outdoor placement, condensate routing, electrical requirements, and local code requirements before purchase.
• This is not a DIY quick-connect system. Refrigerant piping, evacuation, electrical work, startup, and commissioning should be handled by a qualified HVAC professional.
• Line sets, wall brackets, disconnects, pads, electrical materials, and installation accessories may be sold separately unless specifically included.

Frequently Asked Questions:

What size room is this best for?
A 9K mini split is commonly used for smaller rooms, but the right size depends on room load, insulation, ceiling height, windows, sun exposure, and climate. A qualified installer should confirm sizing.

Does this system heat and cool?
Yes. This is a heat pump system designed for both air conditioning and heating.

Is this a DIY system?
No. This Mitsubishi system should be installed by a qualified HVAC professional.

Does it use R-454B refrigerant?
Yes. The MUZ-HX09NL / MSZ-HX09NL system is part of Mitsubishi's R-454B equipment lineup.

Specifications:

BRAND NAME	Mitsubishi
SERIES	HX-Series
SYSTEM TYPE	Ductless mini split heat pump
OUTDOOR MODEL	MUZ-HX09NL
INDOOR MODEL	MSZ-HX09NL
ZONE CAPACITY	1 zone
COOLING CAPACITY	9,000 BTU
HEATING CAPACITY	10,900 BTU
HEATING CAPACITY AT 5F	7,700 BTU
AHRI CERTIFICATE NUMBER	216626290
SEER2	20.0
EER2	12.5
HSPF2	10.0
REFRIGERANT TYPE	R-454B
POWER SUPPLY	208/230V, 1 phase
MAX OVERCURRENT PROTECTION	17 A
LIQUID LINE SIZE	1/4 in
GAS LINE SIZE	3/8 in
OUTDOOR DIMENSIONS	31 in W x 22 in H x 11 in D
INDOOR DIMENSIONS	33 in W x 11 in H x 9 in D
REGISTERED WARRANTY	10-year parts and compressor limited warranty when registered within 90 days; terms apply
NON-REGISTERED WARRANTY	5-year parts / 7-year compressor limited warranty; terms apply