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Mitsubishi GX 12000 BTU 25.6 SEER2 Ductless Mini Split Heat Pump AC

System R454B

USD $3,453.25

Condition : New

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Mitsubishi Single Zone Inverter Mini Split System
Mini Split systems are perfect for rooms that are either too hot in the summer or too cold in the winter and works great for renovations and add-ons. This environmentally-friendly unit self-regulates to keep your rooms at a steady temperature - no huge temperature swings! 

This system is so energy-efficient you'll enjoy the savings as much as the reliable and comfortable heating and cooling! If you've never had an air conditioning system, no worries - with ductless mini splits no duct work is required.

Installation Accessory Bundle
Save time and money with the included 15 foot install kit; don't purchase these required items elsewhere at a markup! Feel confident in your choice with us: No need to guess at what you might need, and all at our low, wholesale pricing. 


System Model Number:
MSZ-GX12NL / MUZ-GX12NL / MSKITI-1438-15


MITSUBISHI 1 Zone WiFi Ductless Mini Split heat Pump AC System
with 15ft Install Kit

Mitsubishi is perhaps the best known mini split brand on the market, and for a good reason -- no one beats the quality! After all, how could they? Mitsubishi is the first manufacturer of mini splits, and has kept up with innovating the market ever since.

12,000 BTU, 25.6 SEER2
At a rated capacity of 12,000 BTU, this system can easily cover a room up to 600 sqft in ideal climates. Thanks to the unit's high-efficiency compressor and an inverter-integrated motor, enjoy a cooling efficiency of 25.6 SEER2 that can heat and cool almost any space suitable for its output much more efficiently than most standard central split systems.

Key Features

  • Four Fan Speeds: Choose from Low, Medium, High, or Super-high for precise airflow control.
  • Econo Cool Mode: Adjusts cooling set points and airflow automatically to improve efficiency.
  • 12-Hour Timer: Schedule the system to turn on or off for added convenience and comfort.
  • Anti-Mold Filter: Helps maintain cleaner indoor air and protects against dust or allergens.
  • Inverter Compressor: Provides consistent temperature control while reducing energy usage.
  • Electronic LEVs: (Linear Expansion Valves) Optimizes refrigerant flow for improved efficiency.
  • Handheld Remote: Full remote control with holder mount and batteries included with the unit.
  • Auto Restart: System automatically restores previous settings in an event of a power outage.
  • Blue Fin Coating: Anti-corrosion that protects the outdoor coil for increased durability.

Please note that this model of equipment does not have quick connect line set connectors and is not a DIY unit. You will need a professional to install and vacuum the lines as needed to uphold the warranty.

System Specifications
  • Efficiency Ratings: SEER2: 25.6 ' EER2: 13.35 ' HSPF2: 10.7 ' COP at 47°F: 3.84
  • Cooling Capacity: Up to 1,300 - 14,000 BTU/h (rated capacity 12,000)
  • Cooling Range: Unit can provide cooling at outdoor temps of 14°F up to 115°F
  • Heating Capacity: Up to 3,300 - 19,100 BTU/h (rated capacity 12,300)
  • Heating Range: Unit can provide heating at outdoor temps of -5°F up to 75°F
  • Refrigerant & Lines: R454B ' Liquid: 1/4" ' Gas: 3/8" ' Max length: 65 ft
  • Electrical Data: 208/230V, 1-phase, 60Hz ' Outdoor breaker: 15A
  • Indoor Unit
    • Dimensions: 31-13/32" W x 9-21/32" D x 11-25/32" H
    • Unit Weight: 23 lbs (10.4 kg)
    • Noise/Sound: 45 (cooling) / 43 (heating) dB(A)
  • Outdoor Unit
    • Dimensions: 31-1/2" W x 11-1/4" D x 21-5/8" H
    • Unit Weight: 77 lbs (34.6 kg)
    • Noise/Sound: 49 (cooling) / 51 (heating) dB(A)

Accessories Overview

Note: The 15ft kit is included in the same box - items cannot be subbed out nor can we change the line set/wire length. However, you can purchase matching accessories to use instead separately.


15ft Tech Recommended Installation Kit Insulated Copper Line Set
15 Foot Length / Flared Ends
1/4" Liquid Line x 3/8" Suction Line
Remote Accys
Remote Controller
2x AAA Batteries Electrical Accys
Control Wire / Indoor Power Cable Drain Accys
Condensate Drain Tubing
Drain Joint / Elbow Mounting Accys Indoor Unit Mounting Plate
Sealing Accys Through-Wall Sleeve
Seal & Wrapping tape
Mitsubishi GX 12000 BTU 25.6 SEER2 Ductless Mini Split Heat Pump AC System R454B
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