Mitsubishi Electric 12,000 BTU 25.6 SEER2 Wall Mounted Ductless Mini Split Heat Pump System R454B Refrigerant with Wi-Fi | MZ-GX12NLHZ

Mitsubishi Electric

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MSZ-GX12NL-MUZ-GX12NLHZ
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Condition:
New
Width:
31.50 (in)
Height:
13.00 (in)
Depth:
21.63 (in)

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Overview

Mitsubishi Electric 12,000 BTU 25.6 SEER2 Wall Mounted Ductless Mini Split Heat Pump System R454B Refrigerant with Wi-Fi | MZ-GX12NLHZ

Complete system: Mitsubishi Electric 12,000 BTU 25.6 SEER2 Wall Mounted Ductless Mini Split Heat Pump System R454B Refrigerant with Wi-Fi - complete system with included remote
Product details

Description

The Mitsubishi MSZ-GX12NL-MUZ-GX12NLHZ is a 12,000 BTU mini split system with a SEER2 of 26.8 and an HSPF2 of 12. This ductless wall-mounted unit employs the low-global warming potential refrigerant R-454B, offering efficient cooling and heating for year-round comfort. It is designed for easy integration in both residential and commercial settings.

Performance:
Equipped with a variable-speed inverter compressor and enhanced coil design, this system optimizes airflow and maintains steady indoor temperatures efficiently. The system’s high SEER2 rating ensures excellent energy savings during cooling seasons, while the HSPF2 supports cost-effective heating.

Smart Features:
Compatible with Mitsubishi’s smart controls and thermostats, this model supports Wi-Fi operation and allows users to adjust settings remotely. The system’s zoning capabilities make it suitable for multi-room applications, improving overall comfort and energy management.

Comfort & Noise:
The unit operates at low noise levels, around 22 dBA, ensuring minimal disruption in living and work spaces. The airflow rate supports balanced and comfortable room environments without cold spots or drafts.

Use Case Fit:
Ideal for residential homes, multi-family units, and small commercial spaces, this model handles moderate heating needs efficiently. It’s suited for retrofit and new construction projects requiring flexible ductless solutions.

Value & Reliability:
Manufactured with Mitsubishi’s robust components and inverter technology, it ensures durability and consistent performance. The system reduces operational expenses through smart load management and energy-efficient design.

Summary Wrap-Up:
With strong efficiency, smart features, and quiet operation, the MSZ-GX12NL-MUZ-GX12NLHZ offers a versatile HVAC option for professional installers and property managers focused on delivering comfort and energy savings.

Key Features

  • 26.8 SEER2 / 12 HSPF2: Balances efficient cooling and heating for year-round savings.

  • Eco-Friendly R-454B Refrigerant: Reduces environmental impact while maintaining performance.

  • Low Noise Levels: Operates quietly at approximately 22 dBA.

  • Smart Thermostat Integration: Provides remote control and scheduling capabilities.

  • Advanced Inverter Compressor: Ensures efficient temperature regulation.

  • Multi-Zone Support: Enables precise control across multiple rooms.

  • Space-Saving Design: Wall-mounted configuration for easy installation.

Replaces Discontinued Models

Replacement matches are based on unit type, capacity and features. Verify line set, electrical supply and controls before ordering. See the discontinued Mitsubishi model cross-reference for details and original manuals.

White Paper

Comfort for the people who live there

The right equipment keeps the rooms you live in steady and quiet, whether it's dinner in the kitchen or a weekend project in the garage.

Specifications

Extra Information

Find your comfort-ready size with confidence

Get a fast, learning-friendly estimate for tons and BTUs, then review it with a Pro to dial in the perfect fit for your home.

Brand:
Mitsubishi Electric
Width:
31.50 (in)
Height:
13.00 (in)
Depth:
21.63 (in)
Weight:
111.00 LBS
Capacity (Tons):
1
Electrical Frequency:
60 Hz
Configuration:
Wall Mount
Connection Type:
Flared
Compressor Type:
Inverter
Cooling Capacity (BTU):
12,000
Heating Output (BTU):
10,000 - 19,000 BTU
Refrigerant Type:
R-454B
Zones:
1
Safety Information:
⚠ WARNING: This product can expose you to chemicals including lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
Electrical Phase:
1-Phase
AHRI Certified:
Yes
Product Category:
Ductless Mini Split Single Zone
Prop 65 Warning:
Yes
Mount Type:
Wall Mount
System Type:
Heat Pump
SEER2:
20+ SEER2
EER2:
13+ EER2
HSPF2:
10+ HSPF2
Cold Climate:
Yes
Minimum Heating Temp (°F):
-22
Wi-Fi Control:
Built-In
Energy Star Listed:
Yes
Sound Level Indoor (dB):
19
Sound Level Outdoor (dB):
49
Line Set Size:
1/4 in x 3/8 in
Voltage / Phase:
208/230V 1-Phase
Indoor Unit MSZ-GX12NL - Type:
Wall Mounted
Indoor Unit MSZ-GX12NL - Nominal Capacity (Tons):
1
Indoor Unit MSZ-GX12NL - Cooling Capacity (BTU/h):
12,000
Indoor Unit MSZ-GX12NL - Heating Capacity (BTU/h):
14,400
Indoor Unit MSZ-GX12NL - Refrigerant:
R-454B
Indoor Unit MSZ-GX12NL - Voltage/Phase/Hz:
208-230 V / 1 Ph / 60 Hz
Indoor Unit MSZ-GX12NL - Airflow (CFM):
151-448
Indoor Unit MSZ-GX12NL - Sound Level (dB):
19-45
Indoor Unit MSZ-GX12NL - Liquid Line Size:
1/4 in
Indoor Unit MSZ-GX12NL - Suction Line Size:
3/8 in
Indoor Unit MSZ-GX12NL - Unit Dimensions (W x D x H):
31.41 in x 9.66 in x 11.78 in
Indoor Unit MSZ-GX12NL - Unit Weight:
23 lb
Indoor Unit MSZ-GX12NL - Shipping Weight:
27 lb
Outdoor Unit MUZ-GX12NLHZ - Nominal Capacity (Tons):
1
Outdoor Unit MUZ-GX12NLHZ - Cooling Capacity (BTU/h):
12,000
Outdoor Unit MUZ-GX12NLHZ - Heating Capacity (BTU/h):
12,300
Outdoor Unit MUZ-GX12NLHZ - Maximum Indoor Units (Zones):
1
Outdoor Unit MUZ-GX12NLHZ - Refrigerant:
R-454B
Outdoor Unit MUZ-GX12NLHZ - Voltage/Phase/Hz:
208-230 V / 1 Ph / 60 Hz
Outdoor Unit MUZ-GX12NLHZ - Minimum Circuit Ampacity (MCA):
16 A
Outdoor Unit MUZ-GX12NLHZ - Maximum Overcurrent Protection (MOP):
20 A
Outdoor Unit MUZ-GX12NLHZ - Compressor Type:
Twin Rotary
Outdoor Unit MUZ-GX12NLHZ - Minimum Heating Temp (F):
-23 F
Outdoor Unit MUZ-GX12NLHZ - Sound Level (dB):
49
Outdoor Unit MUZ-GX12NLHZ - Liquid Line Size:
1/4 in
Outdoor Unit MUZ-GX12NLHZ - Suction Line Size:
3/8 in
Outdoor Unit MUZ-GX12NLHZ - Unit Dimensions (W x D x H):
31.5 in x 11.25 in x 21.63 in
Outdoor Unit MUZ-GX12NLHZ - Unit Weight:
82 lb
Outdoor Unit MUZ-GX12NLHZ - Shipping Weight:
89 lb
Replaces Models:
MSH12BN, MSH12DN-U1, MSH12EN, MSH12NN, MSH12NN2, MSH12TN, MSZ-A12NA, MSZ-GE12NA, MSZ-GL12NA, MSZ-GS12NA, MSZ12UN, MUZ-GS12NAHZ
Please Note: To validate the manufacturer's warranty, equipment must be installed by a qualified licensed professional in accordance with local codes and the manufacturer's installation requirements.

2023 Energy Standards

Department of Energy (DOE) State Regulations – Effective 2023

Click the link below to view the energy standards applicable to your region.

DOE State Standards Document

Department of Energy (DOE) State Regulations – Effective 2023

Click the link below to view the energy standards applicable to your region.

DOE State Standards Document

Documents & warranty
Warranty
7 Years Compressor & 5 Years Parts | Registration Required within 90 Days of Purchase
Videos3 videos
Mitsubishi Electric Ductless Mini Splits: Quiet R-32 Comfort
Frequently asked questions
What size is the ?
The is a 1 ton unit.
How much cooling does the provide?
It is rated for 12,000 BTU of cooling.
What refrigerant does the use?
It uses R-454B refrigerant.
How many zones does the support?
It supports 1 zone(s).
What is the SEER2 rating of the ?
The is rated at 20+ SEER2 SEER2.
What is the HSPF2 heating efficiency of the ?
It is rated at 10+ HSPF2 HSPF2.
How cold can it be outside for the to keep heating?
It is rated to heat down to -22 °F outdoors.
Can the be controlled over Wi-Fi?
Built-In.
How loud is the outdoors?
The rated outdoor sound level is 49 dB.
What power supply does the need?
It requires 208/230V 1-Phase power.
Which models does the replace?
MSH12BN, MSH12DN-U1, MSH12EN, MSH12NN, MSH12NN2, MSH12TN, MSZ-A12NA, MSZ-GE12NA, MSZ-GL12NA, MSZ-GS12NA, MSZ12UN, MUZ-GS12NAHZ
What warranty comes with the MSZ-GX12NL-MUZ-GX12NLHZ?
7 Years Compressor & 5 Years Parts | Registration Required within 90 Days of Purchase
Who makes the MSZ-GX12NL-MUZ-GX12NLHZ?
The MSZ-GX12NL-MUZ-GX12NLHZ is made by Mitsubishi Electric.