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42,000 BTU Mitsubishi GX-Series 19.3 SEER2 Dual Zone Wall Mounted Mini Split Heat Pump System - R454B | 18 + 18

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Mitsubishi

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Model

MXZ-5D42NL / 2-MSZ-GX18NL

ID

199870

Expected Arrival - January 2026
Was $8,789.75
Your Low Price $7,031.80
 
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Refrigerant Line Set with 1/4" and 1/2" Line Ends - 15 feet
Refrigerant Line Set with 1/4" and 1/2" Line Ends - 15 feet
40,500 BTU GX-Series Wall Mount System | 18k + 18k

$7,031.80

42,000 BTU Mitsubishi GX-Series 19.3 SEER2 Dual Zone Wall Mounted Mini Split Heat Pump System - R454B | 18 + 18

This GX-Series system features two 42,000 BTU wall-mounted units, providing powerful and consistent comfort in dual large zones. Well-suited for homes, shops, or offices needing high-capacity climate control.

  • Total Capacity: 42,000 BTU
  • SEER2 Rating: 19.3
  • Indoor Unit Sizes: 18,000 + 42,000 BTU
  • Refrigerant: R454B - Greener, next-gen refrigerant
  • Mounting Type: Wall Mounted
  • Special Feature: Large-area comfort with modern wall-mount design

Ideal for dual large rooms needing consistent year-round temperature control.

42,000 BTU Mitsubishi M-Series Multi Zone Mini Split Heat Pump Condenser - R454B - MXZ-5D42NL

*Please Note* This product is currently estimated to ship sometime in January 2026

MXZ-5D42NL - Multi-Zone Heat Pump Outdoor Unit

The MXZ-5D42NL is a high-performance outdoor heat pump unit from Mitsubishi Electric, designed for multi-zone applications. Capable of connecting up to five indoor units, it provides efficient heating and cooling solutions for residential and light commercial settings, ensuring year-round comfort. Below are the key features and specifications of this model:

Key Features:

  • Variable Speed INVERTER-Driven Compressor: Adjusts compressor speed to match heating or cooling demand, optimizing energy efficiency and maintaining consistent indoor temperatures.
  • Quiet Operation: Operates at sound pressure levels as low as 52 dB(A), minimizing noise disturbances in your environment.
  • Blue Fin Heat Exchanger Coating: Enhances corrosion resistance, extending the unit's lifespan, especially in coastal or humid environments.
  • Built-in Base Pan Heater: Prevents ice buildup in the base pan during heating operation in cold weather conditions.
  • Advanced Protections: Includes compressor overcurrent detection, fan motor overheating/voltage protection, compressor thermal protection, and high-pressure protection for enhanced safety and reliability.
  • Seacoast Protection: Rated for 2,000 hours spraying time per ASTM B117 Standard, making it suitable for coastal areas.

Specifications:

  • Cooling Capacity at 95°F:
    • Maximum Capacity: 43,000 BTU/h
    • Rated Capacity: 40,500 BTU/h (Non-Ducted), 38,000 BTU/h (Mixed), 36,400 BTU/h (Ducted)
    • Minimum Capacity: 12,600 BTU/h (Non-Ducted), 12,600 BTU/h (Mixed), 12,600 BTU/h (Ducted)
  • Heating Capacity at 47°F:
    • Maximum Capacity: 53,600 BTU/h
    • Rated Capacity: 45,000 BTU/h (Non-Ducted), 43,000 BTU/h (Mixed), 41,000 BTU/h (Ducted)
    • Minimum Capacity: 12,800 BTU/h (Non-Ducted), 12,800 BTU/h (Mixed), 12,800 BTU/h (Ducted)
  • Heating Capacity at 17°F:
    • Maximum Capacity: 30,500 BTU/h
    • Rated Capacity: 29,000 BTU/h (Non-Ducted), 27,600 BTU/h (Mixed), 26,200 BTU/h (Ducted)
  • Heating Capacity at 5°F:
    • Maximum Capacity: 25,000 BTU/h
  • Efficiency Ratings:
    • SEER2: 19.30 (Non-Ducted), 17.45 (Mixed), 15.60 (Ducted)
    • EER2: 9.30 (Non-Ducted), 9.15 (Mixed), 9.00 (Ducted)
    • HSPF2 (IV): 9.10 (Non-Ducted), 8.55 (Mixed), 8.00 (Ducted)
    • COP at 47°F: 3.00 (Non-Ducted), 2.82 (Mixed), 2.66 (Ducted)
    • COP at 17°F (Maximum Capacity): 2.00 (Non-Ducted), 1.80 (Mixed), 1.62 (Ducted)
    • COP at 5°F (Maximum Capacity): 1.76 (Non-Ducted), 1.56 (Mixed), 1.38 (Ducted)
  • Electrical Requirements:
    • Power Supply: 208/230 V AC, Single-phase, 60 Hz
    • Guaranteed Voltage Range: 198 - 253 V AC
    • Voltage (Indoor to Outdoor, S1-S2): 208/230 V AC
    • Voltage (Indoor to Outdoor, S2-S3): 24 V DC
    • Recommended Wire Size (Indoor to Outdoor): AWG 14
    • Short-circuit Current Rating (SCCR): 5 kA
    • Minimum Circuit Ampacity (MCA): 39.2 A
    • Maximum Overcurrent Protection (MOCP): 67 A
  • Fan Motor:
    • Full Load Amperage: 1.74 A
    • Output: 88 W
    • Airflow Rate: 2,447 CFM (Cooling), 2,514 CFM (Heating)
  • Unit Dimensions:
    • Width: 37-13/32 inches
    • Depth: 13 inches
    • Height: 31-11/32 inches
    • Weight: 152 lbs (69 kg)

The MXZ-5D42NL is ideal for applications requiring efficient heating and cooling performance across multiple zones. Its advanced features ensure reliable operation and enhanced comfort throughout the year.

18,000 BTU Mitsubishi GX-Series Single or Multi Zone Wall Mounted Mini Split Air Handler - R454B

MSZ-GX18NL Air Handler Overview

The MSZ-GX18NL air handler is a high-efficiency, reliable HVAC system designed for residential and light commercial use. When paired with the MUZ-GX18NL outdoor unit, it delivers consistent and effective heating and cooling performance throughout the year. The system incorporates advanced technologies such as inverter-driven operation, Hyper Heating capabilities, and quiet performance, making it an excellent choice for users seeking energy efficiency, comfort, and long-lasting durability in their indoor environments.

Key Features

  • Energy Efficiency: The MSZ-GX18NL is engineered to optimize energy usage, reducing electricity consumption while maintaining high performance. This results in lower energy costs and a smaller environmental footprint, making it a sustainable solution for climate control.
  • Quiet Operation: Designed with a focus on reducing sound levels, the MSZ-GX18NL operates quietly, ensuring a peaceful indoor environment. Its quiet operation is ideal for bedrooms, living rooms, offices, or any space where minimizing noise is essential.
  • Compact and Stylish Design: The MSZ-GX18NL features a sleek and compact design that fits seamlessly into modern living spaces. Its space-saving profile is perfect for installations in smaller areas while providing efficient cooling and heating performance.
  • Advanced Filtration System: The air handler includes a high-performance filtration system that helps reduce allergens, dust, and other particulate matter, improving indoor air quality and creating a healthier living or working environment.
  • Durability: With a corrosion-resistant coating, the MSZ-GX18NL is built to withstand harsh environmental conditions, ensuring long-lasting reliability, even in humid or corrosive environments.

Specifications

  • Cooling Capacity: 18,000 BTU/h
  • Heating Capacity: 20,600 BTU/h
  • Power Supply: 208-230V, 60Hz, 1-phase
  • Dimensions: 31-1/2" (W) x 11-5/8" (H) x 25-1/4" (D)
  • Weight: 29 lbs

Advanced Features and Benefits

  • Inverter Technology: The MSZ-GX18NL utilizes inverter-driven technology, allowing the system to adjust the compressor speed according to the real-time cooling and heating demands. This provides improved energy efficiency, ensures consistent indoor temperatures, and reduces wear on the system for longer lifespan.
  • Hyper Heating Technology: The MSZ-GX18NL is equipped with Hyper Heating technology, which allows the air handler to maintain efficient heating performance even in extremely low outdoor temperatures. This ensures a reliable and consistent source of warmth even in harsh winter conditions.
  • Remote Control: The MSZ-GX18NL comes with an easy-to-use remote control, giving users the ability to adjust settings such as temperature, fan speed, and operating modes from anywhere in the room, offering flexibility and convenience for managing indoor comfort.
  • Auto Restart Function: In the event of a power outage, the MSZ-GX18NL features an auto-restart function that restores the unit's previous settings automatically once power is resumed. This eliminates the need for manual intervention and ensures uninterrupted comfort.
  • Self-Diagnosis and Error Reporting: This system includes a self-diagnosis feature that detects any faults or issues, displaying error codes for easy troubleshooting. This reduces service calls and ensures reliable operation over time.

Installation and Maintenance

  • Easy Installation: The MSZ-GX18NL is designed for straightforward installation. Its compact size and flexible mounting options make it ideal for installation in various residential and commercial spaces where space may be limited.
  • Low Maintenance Requirements: With its durable construction and washable filters, the MSZ-GX18NL requires minimal maintenance. Regular cleaning of the filters helps ensure optimal performance, reducing the need for professional servicing.
  • Washable Filters: The MSZ-GX18NL comes with washable filters that are easy to remove and clean. This feature helps to reduce maintenance costs and improve the system's overall efficiency by ensuring better airflow and air quality.

Applications

  • Residential Use: The MSZ-GX18NL is perfect for cooling and heating larger homes, apartments, or individual rooms. Its quiet operation, energy efficiency, and sleek design make it an excellent choice for living spaces, bedrooms, or home offices.
  • Commercial Use: This air handler is also suitable for light commercial applications, including small offices, retail spaces, or server rooms. Its efficient operation and ability to maintain a consistent temperature make it a valuable addition to any commercial environment.

In conclusion, the MSZ-GX18NL air handler is an efficient and reliable solution for both residential and light commercial climate control needs. Featuring advanced technologies such as inverter-driven operation, Hyper Heating, and quiet operation, it ensures consistent comfort throughout the year while reducing energy costs. Its compact design, durability, and low maintenance requirements make it an excellent choice for users seeking long-lasting, energy-efficient HVAC solutions.

Mitsubishi M-Series - 3 Ports - Branch Box

Mitsubishi Electric PAC-LMA30BC Branch Box

The PAC-LMA30BC branch box is designed for efficient refrigerant distribution in Mitsubishi Electric HVAC systems. It supports up to three indoor units and ensures optimal performance through advanced piping configurations. Its compact design and durable construction make it ideal for residential and commercial applications.

Key Features

  • Supports Multiple Indoor Units: Connects up to three indoor units for flexible installation.
  • Efficient Refrigerant Distribution: Ensures balanced refrigerant flow to each connected unit.
  • Durable Construction: Galvanized steel casing provides long-lasting protection.
  • Compact Design: Optimized dimensions for easy installation in tight spaces.
  • Low Power Consumption: Operates efficiently with a power input of only 0.003 kW.

Technical Specifications

  • Power Supply: Single-phase, 208/230V, 60Hz
  • Running Current: 0.15A
  • Dimensions (W x D x H): 17-3/4" x 11-1/16" x 6-3/4" (450mm x 280mm x 170mm)
  • Weight: 15 lbs (6.7 kg)

Piping Connections

  • Indoor Unit Connections:
    • Liquid Line: 1/4" (6.35mm) x 3
    • Gas Line: 3/8" (9.52mm) x 3
  • Outdoor Unit Connections:
    • Liquid Line: 3/8" (9.52mm)
    • Gas Line: 5/8" (15.88mm)

Optional Accessories

  • Branch Box Enclosure (BBE-1): Protects the branch box in exposed installations.
  • Port Adapters: Available for different pipe diameter conversions.

The PAC-LMA30BC branch box provides an essential connection point for multi-zone HVAC systems, enhancing performance and installation flexibility.

Refrigerant Line Set with 1/4" and 1/2" Line Ends - 15 feet

Refrigerant line set (pair) for mini split systems, liquid line size 1/4 inch O.D. flared ends, suction line size 1/2 inch O.D. flared ends, length 15 feet, insulation thickness of 1/2 inch. For use with air conditioning and refrigeration systems, includes both the liquid line and the suction line.

Features:

  • One pair, heavy duty refrigerant lines
  • Flared line ends
Refrigerant Line Set with 1/4" and 1/2" Line Ends - 30 feet

Refrigerant line set (pair) for mini split systems, liquid line size 1/4 inch O.D. flared ends, suction line size 1/2 inch O.D. flared ends, length 30 feet, insulation thickness of 1/2 inch. For use with air conditioning and refrigeration systems, includes both the liquid line and the suction line.

Features:

  • One pair, heavy duty refrigerant lines
  • Flared line ends
Refrigerant Line Set with 1/4" and 1/2" Line Ends - 50 feet

Refrigerant line set (pair) for mini split systems, liquid line size 1/4 inch O.D. flared ends, suction line size 1/2 inch O.D. flared ends, length 50 feet, insulation thickness of 1/2 inch. For use with air conditioning and refrigeration systems, includes both the liquid line and the suction line.

Features:

  • One pair, heavy duty refrigerant lines
  • Flared line ends
Refrigerant Line Set with 1/4" and 1/2" Line Ends - 25 feet

Refrigerant line set (pair) for mini split systems, liquid line size 1/4 inch O.D. flared ends, suction line size 1/2 inch O.D. flared ends, length 25 feet, insulation thickness of 1/2 inch. For use with air conditioning and refrigeration systems, includes both the liquid line and the suction line.

Features:

  • One pair, heavy duty refrigerant lines
  • Flared line ends
Refrigerant Line Set with 1/4" and 1/2" Line Ends - 35 feet

Refrigerant line set (pair) for mini split systems, liquid line size 1/4 inch O.D. flared ends, suction line size 1/2 inch O.D. flared ends, length 35 feet, insulation thickness of 1/2 inch. For use with air conditioning and refrigeration systems, includes both the liquid line and the suction line.

Features:

  • One pair, heavy duty refrigerant lines
  • Flared line ends
More Information
42,000 BTU Mitsubishi M-Series Multi Zone Mini Split Heat Pump Condenser - R454B - MXZ-5D42NL
SKUMXZ-5D42NL
Weight152.000000
ManufacturerMitsubishi
ReplacesMXZ-5C42NA4-U1
Cooling BTU43000
Heating BTU53600
Decibel Level (dBA)59
RefrigerantR454B
SEER219.3
Compressor TypeTwin Rotary
Liquid Valve Size1/4" (5)
Suction Valve Size3/8" (4); 1/2" (1)
Electrical208/230V 1 Phase 60 Hz
Max Breaker Size67
Min. Breaker Size39
BTU/Tonnage42,000 BTU/3.5 Ton
Zone CompatibilityMulti Zone
Height31.43"
Width37.45"
Depth13"
Warranty10 Years with Online Registration
Resources You will need Adobe® Acrobat® Reader to view PDF documents.
18,000 BTU Mitsubishi GX-Series Single or Multi Zone Wall Mounted Mini Split Air Handler - R454B
SKUMSZ-GX18NL
Weight33.000000
ManufacturerMitsubishi
ReplacesMSZ-GS18NA-U1
HSPF210.3
Decibel Level (dBA)28-49
RefrigerantR454B
Mini Split TypeWall Mounted
Zone CompatibilityMulti Zone
Height12-13/16"
Width35-5/16"
Depth9-3/8"
Warranty10 Years with Online Registration
Resources You will need Adobe® Acrobat® Reader to view PDF documents.
Safety InformationPROPOSITION 65 WARNING
Mitsubishi M-Series - 3 Ports - Branch Box
SKUPAC-LMA30BC
Weight15.000000
ManufacturerMitsubishi
ReplacesPAC-MKA32BC & PAC-MKA33BC
RefrigerantR454B
Height6-3/4"
Width17-3/4"
Depth11-1/16"
Warranty10 Years with Online Registration
Safety InformationPROPOSITION 65 WARNING
Refrigerant Line Set with 1/4" and 1/2" Line Ends - 15 feet
SKU201814
Weight15.000000
ManufacturerOnline Supply
Length15'
Height1/2"
Width1/2"
Safety InformationPROPOSITION 65 WARNING
Refrigerant Line Set with 1/4" and 1/2" Line Ends - 30 feet
SKU216741
Weight30.000000
ManufacturerOnline Supply
Length30'
Height1/2"
Width1/2"
Safety InformationPROPOSITION 65 WARNING
Refrigerant Line Set with 1/4" and 1/2" Line Ends - 50 feet
SKU366402
Weight45.000000
ManufacturerOnline Supply
Length50'
Height1/2"
Width1/2"
Safety InformationPROPOSITION 65 WARNING
Refrigerant Line Set with 1/4" and 1/2" Line Ends - 25 feet
SKU366400
Weight25.000000
ManufacturerOnline Supply
Length25'
Height1/2"
Width1/2"
Safety InformationPROPOSITION 65 WARNING
Refrigerant Line Set with 1/4" and 1/2" Line Ends - 35 feet
SKU366401
Weight35.000000
ManufacturerOnline Supply
Length15'
Height1/2"
Width1/2"
Safety InformationPROPOSITION 65 WARNING
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Why Choose Mitsubishi Mini Splits?
Why Choose Mitsubishi Mini Splits?

Mitsubishi mini split air conditioners and heat pumps provide exceptional comfort, energy efficiency, and ultra-quiet performance in any climate. Engineered for reliability and precision, these systems offer year-round heating and cooling while reducing energy costs and enhancing indoor air quality.