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MRCOOL 48,000 BTU DIY 5th Gen 21.8 SEER2 3 Zone Wall Mount Mini Split Heat Pump System - R454B | 230V - 6 + 18 + 24

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Model

DIY-MULTI6-48HP230D / DIY-06-WM / DIY-18-WM / DIY-24-WM

ID

211047

Was $6,139.10
Your Low Price $4,429.00
 
Product Features
  • 48,000 BTU Comfort For 1500 Sq Ft
  • Comfort Coverage Up To 1500 Sq Ft
  • Efficient Comfort Rated 21.8 SEER2
  • WiFi Control From Your Smartphone
  • Simplified Installation-Friendly Design
  • Reliable Cooling Up To 122°F
Customize MRCOOL 48,000 BTU DIY 5th Gen 21.8 SEER2 3 Zone Wall Mount Mini Split Heat Pump System - R454B | 230V - 6 + 18 + 24
48,000 BTU MRCOOL 6 Zone Condenser - R454B
48,000 BTU MRCOOL 6 Zone Condenser - R454B   + $3,228.00
6,000 BTU MRCOOL DIY 5th Generation Wall Mount Air Handler – R454B
6,000 BTU MRCOOL DIY 5th Generation Wall Mount Air Handler – R454B   + $457.00
16ft 1/4 x 3/8 Line Set for DIY 6K, 9K & 12K Indoor - R454B
MRCOOL DIY 75' Line Set Couplers - 1/4" x 1/2"
MRCOOL DIY 75' Line Set Couplers - 3/8" x 5/8"
30" Wall Mount Bracket
Installation Kit for Condensers
Cielo Breez Max Mini Split Thermostat with WiFi
MRCOOL DIY 75' Line Set Couplers - 1/4" x 1/2"
MRCOOL DIY 75' Line Set Couplers - 1/4" x 1/2"
48,000 MRCOOL 5th Gen DIY 21.8 SEER2 Three Zone Wall Mounted Mini Split Heat Pump System - R-454B | 6 + 18 + 24 DIY-MULTI6-48HP230D / DIY-06-WM / DIY-18-WM / DIY-24-WM

$4,429.00

High-efficiency multi-zone wall-mounted ductless mini split system engineered for tailored room climate, superior energy savings, and dependable year-round temperature control.

Experience total comfort flexibility with the MRCOOL DIY 4th Generation Multi-Zone Series Wall-Mounted Mini Split. This adaptable multi-zone system combines a robust 48,000 BTU outdoor condenser with multiple high-performance indoor air handlers, specifically featuring a 6,000 BTU unit tailored for spaces up to 250 sq. ft., an 18,000 BTU unit for areas up to 1,000 sq. ft., and a 24,000 BTU unit built to handle larger spaces up to 1,500 sq. ft. Ideal for dynamic home layouts, this setup provides separate climate management, whisper-quiet performance, and a modern aesthetic that complements any interior.

Why Customers Choose the MRCOOL 3 Zone

  • Simple DIY Setup — Complete the installation yourself utilizing MRCOOL's innovative Quick Connect technology. Pre-charged line sets and straightforward fittings bypass the requirement for complex HVAC tools, saving you considerable professional installation costs.
  • Discreet Wall-Mounted Profile — The indoor air handlers mount high on the wall to stay out of sight, integrating smoothly with your interior design while delivering robust, balanced airflow.
  • Customized Multi-Zone Control — The high-capacity outdoor condenser powers the included 6K, 18K, and 24K wall units concurrently, empowering you to tailor individual room temperatures and square footage coverage precisely where desired.
  • Smart Energy Savings — State-of-the-art inverter technology dynamically modulates performance to sustain your preferred temperature efficiently, helping lower monthly utility expenses.
  • Quiet Daily Operation — Engineered for low-noise performance, the indoor units deliver dependable heating and cooling without disruption, making them perfect for bedrooms, studies, and shared living spaces.

Control Your Comfort from Anywhere

Integrated Wi-Fi connectivity enables you to manage your mini split remotely using the MRCOOL Smart HVAC app on your smartphone or smart device. Modify temperatures, alter modes, program custom schedules, and oversee your indoor climate whether you are relaxing at home or away.

Reliable Heating During Cooler Weather

Built for four-season comfort, this heat pump delivers robust heating capacity during chilly days and maintains efficient operation across shifting outdoor seasonal environments.

What’s Included

  • MRCOOL DIY 4th Generation 48,000 BTU Ductless Mini Split Outdoor Condenser (DIY-MULTI6-48HP230D)
  • MRCOOL DIY 4th Generation Wall-Mounted Indoor Air Handlers (Includes DIY-06-WM, DIY-18-WM, and DIY-24-WM)
  • Quick Connect Line Sets and Installation Components
  • Drain Hose
  • Air Filters
  • Wireless Remote Controls
  • Owner's Manual, Guides, and Other Documents

Recommended Accessories

  • 30" Wall Mount Bracket for Mini Split Systems
  • Cielo Breeze Max Mini Split Thermostat with WiFi, SKU: BM101WA
  • Installation Kit
  • • 3/4" x 6' Electrical Whip – SKU: 84138 • 60A Non-Fused Disconnect – SKU: 83335 • Surge Protector – SKU: ICM517 • CPS Charging Adapter – SKU: 87-AD87 • Telescoping Wall Sleeve – SKU: NFP-75
  • Additional line set options with a coupler
  • Zone 1

    • Coupler - DIYCOUPLER-1438K75C • 16 ft – DIY16-1438-O • 25 ft – DIY25-1438-O • 35 ft – DIY35-1438C-O • 50 ft – DIY50-1438C-O

    Zone 2

    • Coupler - DIYCOUPLER-1412K75C • 16 ft – DIY16-1412-O • 25 ft – DIY25-1412-O • 35 ft – DIY35-1412C-O • 50 ft – DIY50-1412C-O

    Zone 3

    • Coupler - DIYCOUPLER-3858K75C • 16 ft – DIY16-3858-O • 25 ft – DIY25-3858-O • 35 ft – DIY35-3858C-O • 50 ft – DIY50-3858C-O

Warranty

MRCOOL offers a limited warranty of 2-Year Compressor / 1-Year Parts Warranty* when installed according to manufacturer guidelines.

6,000 BTU MRCOOL DIY 5th Generation Wall Mount Air Handler – R454B

MRCOOL® 6k DIY 5th Generation Mini-Split Air Handler 230v

The MRCOOL® 6k DIY 5th Generation Mini-Split Air Handler is a compact, energy-efficient solution designed for single-zone comfort. Ideal for smaller spaces, this 230-volt unit delivers reliable heating and cooling performance while supporting the full functionality of the MRCOOL® DIY series. With a focus on flexibility and user-friendly installation, it's perfect for homeowners looking for a cost-effective and convenient HVAC upgrade.

Key Features:

  • Energy Efficiency: High SEER2 ratings ensure lower energy consumption and long-term cost savings.
  • DIY Installation: Designed to be installed without the need for professional HVAC labor, thanks to the pre-charged line sets and easy-to-follow setup.
  • Quiet Operation: Operates at low sound levels to maintain a peaceful indoor environment.
  • Compact Design: Small footprint makes it ideal for rooms with limited wall space while still delivering efficient comfort.
  • Auto Restart and Timer Functions: Built-in convenience features enhance usability and system responsiveness.
  • Multi-Speed Fan: Offers adjustable airflow settings to suit your comfort needs year-round.

Specifications:

  • Model Number: DIY-06-HP-WMAH-230D25-O
  • Voltage: 230V
  • Cooling Capacity: 6,000 BTU
  • Refrigerant Type: R-454B
  • Mounting Type: Wall-mounted

This air handler is part of the MRCOOL® 5th Generation DIY system, offering high efficiency, ease of use, and superior performance. Whether you're outfitting a new room or replacing an older unit, the 6k Mini-Split Air Handler brings reliable, modern climate control within reach of any homeowner.

MRCOOL DIY 75' Line Set Couplers - 1/4" x 1/2"

Coming in as one of the first brands to offer a multi zone DIY mini split, MRCOOL offers the DIYCOUPLER-1412K50 as a means of coupling two of MRCOOL's precharged line sets together to allow for a longer line for installations that need it, all the while keeping the system precharged in nature. To prevent the need of extending the control wire included with the air handler, the coupler also includes 50' of control wire to replace what comes with MRCOOL DIY air handlers. This coupler furthers MRCOOL's ability to provide a simple DIY installation to almost any wall mounted installation. Please note that this line set will only function with MRCOOL's DIY multi zone line of products and will not function with any other brand or system series.

18,000 BTU MRCOOL DIY 5th Gen Wall Mount Air Handler - R454B

Reliable Year-Round Comfort With Easy DIY Installation

Enjoy reliable year-round comfort with the MRCOOL DIY 5th Generation 18,000 BTU Single Zone Wall Mount Mini Split Air Handler. Designed for use with a compatible outdoor condenser, this indoor unit delivers 18,000 BTU of heating and cooling for spaces up to 1,000 square feet. With R454B refrigerant, Wi-Fi and smartphone app capabilities, an included remote controller, and a DIY-friendly design, it provides convenient temperature control and simplified installation for your space.

Key Features

  • 18,000 BTU Heating and Cooling — Provides dependable year-round comfort for spaces up to 1,000 square feet.
  • Easy DIY Installation — Designed for straightforward installation as part of the MRCOOL DIY 5th Generation system.
  • Smart Temperature Control — Wi-Fi and smartphone app capabilities provide convenient control of comfort settings.
  • Powerful Airflow — Delivers up to 706 CFM in Turbo mode, with multiple fan speeds for flexible air circulation.
  • Quiet Indoor Operation — Sound levels range from 19.0 to 54.5 dBA, helping provide comfortable heating and cooling with adjustable operating performance.

Warranty

MRCOOL offers a limited warranty of 2-Year Compressor / 1-Year Parts Warranty* when installed according to manufacturer guidelines.

48,000 BTU MRCOOL 6 Zone Condenser - R454B

Powerful Multi-Zone Comfort With Easy DIY Installation

Bring customizable year-round comfort to multiple areas of your home with the MRCOOL DIY 5th Generation 48,000 BTU 6-Zone Multi-Zone Mini Split Heat Pump Condenser. Designed to support up to six compatible indoor air handlers, this outdoor unit can provide heating and cooling for spaces up to 2,500 square feet. With up to 21.8 SEER2 efficiency, R454B refrigerant, smart connectivity, and Quick Connect technology, it delivers flexible comfort with a simplified DIY installation experience.

Key Features

  • Flexible 6-Zone Comfort — Supports up to six compatible indoor air handlers, allowing customized temperature control across multiple rooms and living areas.
  • High-Efficiency Performance — With up to 21.8 SEER2 efficiency, the system is designed to deliver dependable year-round comfort while helping manage energy use.
  • DIY-Friendly Installation — Pre-charged Quick Connect line sets with R454B refrigerant help simplify installation by eliminating the need for a vacuum pump during setup.
  • Smart, Connected Control — Smartphone app capabilities provide convenient temperature management, with Amazon Alexa and Google Assistant compatibility for added flexibility.

Warranty

MRCOOL offers a limited warranty of 2-Year Compressor / 1-Year Parts Warranty* when installed according to manufacturer guidelines.

16ft 1/4 x 3/8 Line Set for DIY 6K, 9K & 12K Indoor - R454B

DIY16-1438-O 16ft 1/4 x 3/8 Lineset for DIY 6K, 9K & 12K Indoor - R454B

The MRCOOL DIY16-1438-O is a pre-charged 16-foot line set designed specifically for MRCOOL DIY 6K, 9K, and 12K indoor units using R-454B refrigerant. It is engineered to simplify installation for homeowners and HVAC professionals alike, while maintaining efficiency and refrigerant integrity without the need for vacuuming or charging.

This lineset offers a flexible, durable, and easy-to-connect solution that supports the revolutionary MRCOOL DIY ductless mini-split systems. The Quick Connect® fittings provide a secure and tight seal, ensuring a hassle-free installation and long-term reliability.

Key Features:

  • Length: 16 feet of pre-charged copper tubing
  • Line Sizes: 1/4 inch liquid line and 3/8 inch suction line
  • Refrigerant: Pre-charged with environmentally friendly R-454B
  • Compatibility: Designed for use with MRCOOL DIY 6K, 9K, and 12K indoor units
  • Connection Type: Quick Connect fittings for fast, tool-free installation
  • Insulation: High-quality insulation for efficient thermal performance and reduced energy loss
  • Corrosion Resistance: Durable construction resists environmental wear and corrosion

This lineset is ideal for both first-time installations and replacements, ensuring optimal performance and easy integration with compatible MRCOOL® systems. With a 100% DIY approach, this component allows users to complete professional-level installations without special tools or equipment.

30" Wall Mount Bracket

This wall mount bracket is perfect for outdoor condensers. The length of the wall bracket arms are 30" long. The condensing unit is mounted onto the L-shaped brackets and fastened using bolts and anti-vibration washers (not included with brackets).

Features:

  • Steel: 10 GA
  • Powder-coated grey Finish
  • Load rating: 600 lbs per pair
  • Holes will accommodate anchors for installation
  • Warranty: 1 year
  • ACB line of wall brackets are approved by the Florida Building Commission and are High Velocity Hurricane Zone (HVHZ) approved. (See product certification documentation for complete details.)

No Return Policy

All sales of this product are final and are non-refundable.

Installation Kit for Condensers

Ensure a professional and secure installation for your condenser with this comprehensive installation kit. Designed to provide all the essential components needed for a smooth setup, this kit helps protect your system while ensuring proper electrical and refrigerant connections.

What’s Included:

  • 3/4" x 6' Electrical Whip – SKU: 84138
  • 60A Non-Fused Disconnect – SKU: 83335
  • Surge Protector – SKU: ICM517
  • CPS Charging Adapter – SKU: 87-AD87
  • Telescoping Wall Sleeve – SKU: NFP-75

Equip your condenser with everything needed for a safe, durable, and professional installation. Order your Condenser Installation Kit today!

Cielo Breez Max Mini Split Thermostat with WiFi

Introducing Cielo Breez Max, the ultimate smart thermostat for your mini-splits, designed to elevate your comfort with intelligent climate control. Transform your air conditioner into a smart powerhouse and manage your cooling or heating from anywhere using your phone. This award-winning device, available in black and white, prevents overheating or overcooling with AI-powered Comfy Max, while seamlessly detecting any mini-split brand for hassle-free setup.


Features:

  • Energy Savings
  • WiFi Connectivity
  • Weekly Schedule
  • Geofencing
  • Temperature Range Lock
  • Real-Time Notifications
  • HVAC Zoning

Weekly Schedule lets you set on and off periods throughout the week based on your needs.

Geofencing uses your smartphone's location to trigger actions in your system, such as turning the air conditioner on or off based on your proximity to home.

Temperature Range Lock ensures your air conditioner operates within a set temperature range for optimal comfort and efficiency.

Real-Time Notifications keep you informed with important updates, helping you manage your air conditioner better.

HVAC Zoning allows you to create customized temperature control zones by grouping multiple mini-split units.

The Cielo Breez Max offers innovative features and extraordinary performance, making it a perfect fit for any room air conditioner. Enjoy maximum energy savings and simplified home comfort with this advanced smart thermostat.

MRCOOL DIY 75' Line Set Couplers - 3/8" x 5/8"

Coming in as one of the first brands to offer a multi zone DIY mini split, MRCOOL offers the DIYCOUPLER-3858K75 as a means of coupling two of MRCOOL's precharged line sets together to allow for a longer line for installations that need it, all the while keeping the system precharged in nature. To prevent the need of extending the control wire included with the air handler, the coupler also includes 75' of control wire to replace what comes with MRCOOL DIY air handlers. This coupler furthers MRCOOL's ability to provide a simple DIY installation to almost any wall mounted installation. Please note that this line set will only function with MRCOOL's DIY multi zone line of products and will not function with any other brand or system series.

Please note the 50' version know as (DIYCOUPLER-3858K50) is out-of-stock and has been discontinued.

24,000 BTU MRCOOL DIY 5th Generation Wall Mount Air Handler - R454B

MRCOOL 24k DIY 5th Generation Mini-Split Air Handler 230V

The MRCOOL DIY 24k BTU 5th Generation Mini-Split Air Handler delivers powerful, efficient climate control with the convenience of true DIY installation. Perfect for larger spaces, this 230V unit is designed for homeowners who want high performance and ease of use without relying on professional HVAC services.

Featuring MRCOOL’s innovative DIY Quick Connect line set technology, this air handler allows for fast, tool-free setup. Combined with smart functionality and quiet operation, it offers year-round comfort with intuitive control and minimal maintenance.

Key Features

  • DIY Quick Connect Installation: No vacuuming or charging required—pre-charged linesets make setup fast, easy, and safe for homeowners.
  • 24,000 BTU Capacity: Effectively heats and cools spaces up to 1,000 sq. ft. with powerful, efficient performance.
  • Smart HVAC Integration: Control from anywhere using the MRCOOL SmartHVAC app, Amazon Alexa, or Google Assistant.
  • Leakage Detection: Alerts you in the event of a refrigerant leak to protect your system and ensure safe operation.
  • Auto Restart: Automatically resumes operation after power outages for continuous comfort.
  • Low Ambient Cooling: Provides effective cooling even in outdoor temperatures as low as 5°F, ideal for all-season use.
  • Quiet Performance: Operates at whisper-quiet levels for a peaceful indoor environment.
  • Timer & Sleep Mode: Customizable features that enhance comfort and save energy during off-hours.

Technical Highlights

  • Model: DIY-24-HP-WMAH-230D25-O
  • Power Supply: 208/230V, 60Hz, 1 Phase
  • Air Flow (H/M/L): 941/765/618 CFM
  • Sound Levels (H/M/L): 51/46/41 dB(A)
  • Mounting Type: Wall Mounted
  • Coverage Area: Up to 1,000 sq. ft.

The MRCOOL DIY 5th Gen 24k Air Handler is a powerful, user-friendly HVAC solution that provides professional-level comfort and control—without the need for a professional installer. Ideal for larger rooms or open spaces, this unit delivers dependable heating and cooling with simple, smart operation.

35ft 1/4 x 3/8 Line Set for DIY 6K, 9K & 12K Indoor w/ DIY Pro Cable - R454B

DIY35-1438C-O 35ft 1/4 x 3/8 Lineset for DIY 6K, 9K & 12K Indoor with DIY Pro Cable - R454B

The MRCOOL® DIY35-1438C-O is a 35-foot pre-charged lineset with an integrated DIY Pro Cable, engineered for compatibility with MRCOOL DIY 6K, 9K, and 12K indoor units using R-454B refrigerant. This advanced installation component simplifies setup while delivering excellent durability, refrigerant integrity, and safety.

Equipped with patented Quick Connect fittings, this lineset allows for a hassle-free, tool-free connection between indoor and outdoor units. The added DIY Pro Cable enhances reliability and safety during installation, offering pre-attached wiring in a single bundled solution. It's the ideal choice for extended installations requiring both performance and convenience.

Key Features:

  • Length: 35 feet of pre-charged copper tubing
  • Line Sizes: 1/4 inch liquid line and 3/8 inch suction line
  • Refrigerant: Pre-charged with R-454B refrigerant for environmentally responsible performance
  • Compatibility: Designed for MRCOOL DIY 6K, 9K, and 12K indoor units
  • Connection Type: Quick Connect fittings for easy and secure installation
  • Pro Cable: Integrated DIY Pro Cable for simplified wiring and increased safety
  • Insulation: High-quality insulation ensures efficiency and protection from condensation
  • Durability: Built with corrosion-resistant materials for long-term use

The DIY35-1438C-O is the perfect solution for users seeking an extended lineset with built-in power and communication cabling. Its all-in-one design streamlines setup and supports reliable performance in MRCOOL® DIY mini-split systems.

16ft 1/4 x 1/2 Line Set for DIY 18K Indoor - R454B

DIY16-1412-O 16ft 1/4 x 1/2 Lineset for DIY 18K Indoor - R454B

The MRCOOL DIY16-1412-O is a 16-foot pre-charged lineset designed for MRCOOL® DIY 18K indoor units using R-454B refrigerant. This lineset offers an easy-to-install, reliable solution that eliminates the need for vacuum pumps or refrigerant charging.

Featuring Quick Connect fittings, it allows for quick, tool-free connections between indoor and outdoor units. The durable insulation and corrosion-resistant copper tubing provide excellent thermal performance and long-lasting durability.

Key Features:

  • Length: 16 feet of pre-charged copper tubing
  • Line Sizes: 1/4 inch liquid line and 1/2 inch suction line
  • Refrigerant: Pre-charged with eco-friendly R-454B refrigerant
  • Compatibility: Compatible with MRCOOL DIY 18K indoor units
  • Connection Type: Quick Connect fittings for tool-free installation
  • Insulation: High-quality insulation to prevent condensation and improve energy efficiency
  • Durability: Built with corrosion-resistant materials for extended service life

This lineset is an ideal choice for extending or replacing refrigerant lines in MRCOOL® DIY mini-split systems, providing an efficient and hassle-free installation.

Equipment Pad and Risers Kit

E Lite Condenser Pad and Risers

E Lite Condenser Pad

E Lite Condenser Pad is designed to provide solid support for air conditioning condensers. It's made from sturdy polypropylene, striking a balance between lightness and stability. Its robust design ensures a level ground without the need for extra components.

Key Features:

  • Reliable Support: Abundance of ridges for stable ground support.
  • Durable and Lightweight: Tough yet not excessively heavy, thanks to polypropylene construction.
  • Anti-Slip: The surface prevents slipping, and rounded edges enhance safety.
  • Simple Appearance: Gray color with size labels.
  • Versatile Use: Suitable for condensers, pipes, ducts, cables, and more.

E Lite Risers

E Lite Risers complement the Condenser Pad, allowing you to adjust your setup as needed. They are constructed from weather-resistant PVC for outdoor use.

Key Features:

  • Weather Resistance: Made from tough PVC for long-lasting performance.
  • Secure Setup: The track securely holds bolts in place.
  • Bolts Included: Each set comes with two bolts.
  • Strong Support: Capable of handling loads of up to 397 pounds.

E Lite Condenser Pad and Risers offer reliable support without any complications. They are built to last and deliver efficient performance. Consider E Lite for your support needs – it's a practical solution for your projects.

No Return Policy

All sales of this product are final and are non-refundable.

50ft 1/4 x 3/8 Line Set for DIY 6K, 9K & 12K Indoor w/ DIY Pro Cable - R454B   

DIY50-1438C-O 50ft 1/4 x 3/8 Lineset for DIY 6K, 9K & 12K Indoor with DIY Pro Cable - R454B

The MRCOOL® DIY50-1438C-O is a 50-foot pre-charged lineset with an integrated DIY Pro Cable, designed for use with MRCOOL DIY 6K, 9K, and 12K indoor units using R-454B refrigerant. This extended-length lineset offers a convenient, all-in-one solution for efficient and reliable HVAC installations.

Featuring patented Quick Connect fittings, this lineset enables a quick and secure connection between indoor and outdoor units without specialized tools. The integrated DIY Pro Cable streamlines wiring and enhances installation safety, making it ideal for professional-quality DIY projects.

Key Features:

  • Length: 50 feet of pre-charged copper tubing
  • Line Sizes: 1/4 inch liquid line and 3/8 inch suction line
  • Refrigerant: Pre-charged with eco-friendly R-454B refrigerant
  • Compatibility: Suitable for MRCOOL DIY 6K, 9K, and 12K indoor units
  • Connection Type: Quick Connect fittings for easy, tool-free installation
  • Pro Cable: Integrated DIY Pro Cable for simplified wiring and enhanced safety
  • Insulation: High-quality insulation to improve energy efficiency and prevent condensation
  • Durability: Constructed with corrosion-resistant materials for lasting performance

This 50-foot lineset with integrated Pro Cable is perfect for installations requiring longer reach and professional-grade convenience. It ensures reliable operation and an efficient setup for MRCOOL® DIY mini-split systems.

25ft 1/4 x 1/2 Line Set for DIY 18K Indoor - R454B

DIY25-1412-O 25ft 1/4 x 1/2 Lineset for DIY 18K Indoor - R454B

The MRCOOL® DIY25-1412-O is a 25-foot pre-charged lineset designed for MRCOOL DIY 18K indoor units using R-454B refrigerant. This lineset offers a convenient and reliable solution that eliminates the need for vacuum pumps or refrigerant charging during installation.

Featuring Quick Connect fittings, it enables quick, tool-free connections between indoor and outdoor units. The durable insulation and corrosion-resistant copper tubing ensure optimal thermal efficiency and long-lasting performance.

Key Features:

  • Length: 25 feet of pre-charged copper tubing
  • Line Sizes: 1/4 inch liquid line and 1/2 inch suction line
  • Refrigerant: Pre-charged with eco-friendly R-454B refrigerant
  • Compatibility: Compatible with MRCOOL DIY 18K indoor units
  • Connection Type: Quick Connect fittings for easy installation
  • Insulation: High-quality insulation to prevent condensation and improve energy efficiency
  • Durability: Built with corrosion-resistant materials for extended lifespan

This lineset is an excellent choice for extending or replacing refrigerant lines in MRCOOL® DIY mini-split systems, providing hassle-free installation and dependable operation.

25ft 1/4 x 3/8 Line Set for DIY 6K, 9K & 12K Indoor - R454B 

DIY25-1438-O 25ft 1/4 x 3/8 Lineset for DIY 6K, 9K & 12K Indoor - R454B

The MRCOOL DIY25-1438-O is a 25-foot pre-charged line set engineered for easy installation with MRCOOL DIY 6K, 9K, and 12K indoor units that utilize R-454B refrigerant. This lineset offers an efficient, mess-free solution for both homeowners and professionals who want a clean and secure HVAC connection without the need for vacuum pumps or refrigerant handling.

Equipped with Quick Connect fittings, this lineset simplifies the installation process by providing a tight, reliable seal—eliminating the need for special tools. The pre-charged refrigerant lines and durable insulation deliver excellent performance and energy efficiency in a wide range of settings.

Key Features:

  • Length: 25 feet of pre-charged copper tubing
  • Line Sizes: 1/4 inch liquid line and 3/8 inch suction line
  • Refrigerant: Pre-charged with eco-friendly R-454B refrigerant
  • Compatibility: Works with MRCOOL DIY 6K, 9K, and 12K indoor units
  • Connection Type: Quick Connect fittings for tool-free installation
  • Insulation: High-quality insulation for optimized thermal performance and protection
  • Construction: Built with corrosion-resistant materials for long-term durability

Perfect for extending the installation distance or replacing an existing lineset, the DIY25-1438-O provides a flexible and user-friendly option for MRCOOL® mini-split systems. Its DIY design ensures users can achieve a professional-grade setup with minimal effort and maximum confidence.

50ft 1/4 x 1/2 Lineset for DIY 9K, 12K & 18K Indoor w/ DIY Pro Cable - R454B

DIY50-1412C-O 50ft 1/4 x 1/2 Lineset for DIY 9K, 12K & 18K Indoor with DIY Pro Cable - R454B

The MRCOOL® DIY50-1412C-O is a 50-foot pre-charged lineset featuring an integrated DIY Pro Cable, designed for MRCOOL® DIY 9K, 12K, and 18K indoor units using R-454B refrigerant. This comprehensive lineset simplifies installation by combining refrigerant lines and power wiring into a single, easy-to-install assembly.

Equipped with patented Quick Connect® fittings, it allows for a secure, tool-free connection between indoor and outdoor units. The integrated DIY Pro Cable streamlines wiring, enhancing installation efficiency and safety. High-quality insulation and corrosion-resistant materials ensure long-lasting durability and optimal energy performance.

Key Features:

  • Length: 50 feet of pre-charged copper tubing
  • Line Sizes: 1/4 inch liquid line and 1/2 inch suction line
  • Refrigerant: Pre-charged with eco-friendly R-454B refrigerant
  • Compatibility: Compatible with MRCOOL® DIY 9K, 12K, and 18K indoor units
  • Connection Type: Quick Connect® fittings for easy, tool-free installation
  • Pro Cable: Integrated DIY Pro Cable for simplified wiring and enhanced safety
  • Insulation: High-quality insulation to improve energy efficiency and prevent condensation
  • Durability: Built with corrosion-resistant materials for extended service life

This 50-foot lineset with integrated DIY Pro Cable is ideal for longer installations, providing a reliable and convenient solution for MRCOOL® DIY mini-split systems.

More Information
MRCOOL 18,000 BTU DIY 5th Generation Single Zone Wall Mount Mini Split Air Handler - R454B | 230V
FeatureSpec
SKUDIY-18-HP-WMAH-230D25-O
Weight (in lbs)35.49
Brand/ManufacturerMRCOOL
ReplacesDIY-18-HP-WMAH-230C25
UPC810063868512
ControllerIncluded
Cooling BTU18,000 BTU
Heating BTU18,000 BTU
Maximum CFM706 Turbo / 618 Hi / 530 Med / 430 Lo CFM (Airflow)
Decibel Level (dBA)19.0 - 54.5 dBA
RefrigerantR454B
Liquid Line1/4"
Suction Line1/2"
Electrical208/230V | 1 Phase | 60Hz
BTU/Tonnage18,000 BTU/1.5 Ton
Mini Split TypeWall Mounted
Zone CompatibilitySingle Zone
Height13.19"
Width42.52"
Depth8.9"
Warranty7 Year Compressor / 5 Years Parts Warranty with Online Registration
Resources You will need Adobe Acrobat Reader to view PDF documents.
Safety InformationPROPOSITION 65 WARNING
MRCOOL 24,000 BTU DIY 5th Generation Single Zone Wall Mount Mini Split Air Handler - R454B | 230V
FeatureSpec
SKUDIY-24-HP-WMAH-230D25-O
Weight (in lbs)35.93
Brand/ManufacturerMRCOOL
ReplacesDIY-24-HP-WMAH-230C25
UPC810063868536
ControllerIncluded
Cooling BTU24,000 BTU
Heating BTU24,000 BTU
Maximum CFM941 Turbo / 765 Hi / 618 Med / 500 Lo CFM (Airflow)
Decibel Level (dBA)20 - 54 dBA
RefrigerantR454B
Liquid Line3/8"
Suction Line5/8"
Electrical208/230V | 1 Phase | 60HZ
BTU/Tonnage24,000 BTU/2 Ton
Mini Split TypeWall Mounted
Zone CompatibilitySingle Zone
Height13.19"
Width42.52"
Depth8.9"
Warranty7 Year Compressor / 5 Years Parts Warranty with Online Registration
Resources You will need Adobe Acrobat Reader to view PDF documents.
Safety InformationPROPOSITION 65 WARNING
MRCOOL 48,000 BTU DIY 5th Generation 6 Zone Multi-Zone Mini Split Condenser - R454B| 230V
FeatureSpec
SKUDIY-MULTI6-48HP230D-O
Refrigerant Charge6.55 lbs (Pre-Charged for 25ft Line Set)
Weight (in lbs)223.77
AHRI Certificate Number216032595
Brand/ManufacturerMRCOOL
UPC840255587471
Cooling BTU43,000 BTU
Heating BTU48,000 BTU
Decibel Level (dBA)64 dBA
Energy StarYes
RefrigerantR454B
HSPF210
SEER2 (Efficiency)21.8
EER212
Liquid Line1/4"
Suction Line1/2"
Electrical208/230V | 1 Phase | 60Hz
Max Breaker Size45 Amps
Min. Breaker Size40 Amps
BTU/Tonnage48,000 BTU/4 Ton
Min/Max Outdoor Temp for Heating-13°F - 75°F
Min/Max Outdoor Temp for Cooling-13°F - 122°F
Zone CompatibilityMulti Zone
Height52.48"
Width37.48"
Depth16.34"
Warranty7 Year Compressor / 5 Years Parts Warranty with Online Registration
Resources You will need Adobe Acrobat Reader to view PDF documents.
Safety InformationPROPOSITION 65 WARNING
MRCOOL 6,000 BTU DIY 5th Generation Single Zone Wall Mount Mini Split Air Handler - R454B | 230V
FeatureSpec
SKUDIY-06-HP-WMAH-230D25-O
Weight (in lbs)24.47
Brand/ManufacturerMRCOOL
UPC840255587013
ControllerIncluded
Cooling BTU6,000 BTU
Heating BTU6,000 BTU
RefrigerantR454B
Liquid Line1/4"
Suction Line1/8"
Electrical208/230V | 1 Phase | 60Hz
BTU/Tonnage6,000 BTU/0.5 Ton
Mini Split TypeWall Mounted
Zone CompatibilityMulti Zone
Height11.69"
Width31.57"
Depth7.44"
Warranty7 Year Compressor / 5 Years Parts Warranty with Online Registration
Resources You will need Adobe® Acrobat® Reader to view PDF documents.
Safety InformationPROPOSITION 65 WARNING
MRCOOL DIY 75' Line Set Couplers - 1/4" x 1/2"
FeatureSpec
SKUDIYCOUPLER-1412K75C
Weight (in lbs)10
Brand/ManufacturerMRCOOL
UPC810063869571
RefrigerantR410A
Electrical230 V. 1 Phase 60 Hz
Mini Split TypeWall Mounted
Size Range38" Wide & Up
Height4.5
Width11
Depth22.5 in
Warranty5-year Parts / 7-year Compressor
Resources You will need Adobe® Acrobat® Reader to view PDF documents.
Safety InformationPROPOSITION 65 WARNING
MRCOOL DIY 75' Line Set Couplers - 1/4" x 1/2"
FeatureSpec
SKUDIYCOUPLER-1412K75C
Weight (in lbs)10
Brand/ManufacturerMRCOOL
UPC810063869571
RefrigerantR410A
Electrical230 V. 1 Phase 60 Hz
Mini Split TypeWall Mounted
Size Range38" Wide & Up
Height4.5
Width11
Depth22.5 in
Warranty5-year Parts / 7-year Compressor
Resources You will need Adobe® Acrobat® Reader to view PDF documents.
Safety InformationPROPOSITION 65 WARNING
MRCOOL DIY 75' Line Set Couplers - 3/8" x 5/8"
FeatureSpec
SKUDIYCOUPLER-3858K75C
Weight (in lbs)10
Brand/ManufacturerMRCOOL
UPC810035933286
RefrigerantR410A
Electrical230 V. 1 Phase 60 Hz
Mini Split TypeWall Mounted
Warranty5-year Parts / 7-year Compressor
Resources You will need Adobe® Acrobat® Reader to view PDF documents.
Safety InformationPROPOSITION 65 WARNING
MRCOOL DIY 75' Line Set Couplers - 1/4" x 1/2"
FeatureSpec
SKUDIYCOUPLER-1412K75C
Weight (in lbs)10
Brand/ManufacturerMRCOOL
UPC810063869571
RefrigerantR410A
Electrical230 V. 1 Phase 60 Hz
Mini Split TypeWall Mounted
Size Range38" Wide & Up
Height4.5
Width11
Depth22.5 in
Warranty5-year Parts / 7-year Compressor
Resources You will need Adobe® Acrobat® Reader to view PDF documents.
Safety InformationPROPOSITION 65 WARNING
Cielo Breez Max Mini Split Thermostat with WiFi
FeatureSpec
SKUBM101WA
Weight (in lbs)1
Brand/ManufacturerCielo
UPCna
ElectricalMicro USB with Standard Plug
Height4.25"
Width4.25"
Depth1"
Warranty1 Year Full Replacement
Resources You will need Adobe® Acrobat® Reader to view PDF documents.
Safety InformationPROPOSITION 65 WARNING
Installation Kit for Condensers - Accessory Set
FeatureSpec
SKUMSK001
Weight (in lbs)15
Brand/ManufacturerOnline Supply
UPCna
Resources You will need Adobe® Acrobat® Reader to view PDF documents.
Safety InformationPROPOSITION 65 WARNING
E Lite Equipment Pad and Risers Kit 18" x 38" x 3"
FeatureSpec
SKU87762 / EL1838-3
Weight (in lbs)25
Brand/ManufacturerOnline Supply
UPCna
Height3"
Width18"
Depth38"
Safety InformationPROPOSITION 65 WARNING
30" Wall Mount Bracket for Mini Split Systems
FeatureSpec
SKUACB-30
Weight (in lbs)9.2
Brand/ManufacturerOnline Supply
Length30"
Height16"
Width2"
Resources You will need Adobe® Acrobat® Reader to view PDF documents.
Safety InformationPROPOSITION 65 WARNING
25ft 1/4 x 1/2 Line Set for DIY 18K Indoor - R454B
FeatureSpec
SKUDIY25-1412-O
Weight (in lbs)12.1
Brand/ManufacturerMRCOOL
UPC605468070710
RefrigerantR454B
Liquid Valve Size 1/4
Suction Valve Size 1/2
Safety InformationPROPOSITION-65-WARNING This-product-and-many-products-on-our-site-may-contain-a-chemical-know-to-the-state-of-California-to-cause-cancer-or-birth-defects-or-other-reproductive-harm.-For-more-information-about-Proposition-65-please-Click-Here.
16ft 1/4 x 1/2 Line Set for DIY 18K Indoor - R454B
FeatureSpec
SKUDIY16-1412-O
Weight (in lbs)8.8
Brand/ManufacturerMRCOOL
UPC605468375099
RefrigerantR454B
Liquid Valve Size 1/4
Suction Valve Size 1/2
Safety InformationPROPOSITION-65-WARNING This-product-and-many-products-on-our-site-may-contain-a-chemical-know-to-the-state-of-California-to-cause-cancer-or-birth-defects-or-other-reproductive-harm.-For-more-information-about-Proposition-65-please-Click-Here.
35ft 1/4 x 1/2 Lineset for DIY 9K, 12K & 18K Indoor w/ DIY Pro Cable - R454B
FeatureSpec
SKUDIY35-1412C-O
Weight (in lbs)18.3
Brand/ManufacturerMRCOOL
UPC605468447246
RefrigerantR454B
Liquid Valve Size 1/4
Suction Valve Size 1/2
Safety InformationPROPOSITION-65-WARNING This-product-and-many-products-on-our-site-may-contain-a-chemical-know-to-the-state-of-California-to-cause-cancer-or-birth-defects-or-other-reproductive-harm.-For-more-information-about-Proposition-65-please-Click-Here.
50ft 1/4 x 1/2 Lineset for DIY 9K, 12K & 18K Indoor w/ DIY Pro Cable - R454B
FeatureSpec
SKUDIY50-1412C-O
Weight (in lbs)26.7
Brand/ManufacturerMRCOOL
UPC605468409282
RefrigerantR454B
Liquid Valve Size 1/4
Suction Valve Size 1/2
Safety InformationPROPOSITION-65-WARNING This-product-and-many-products-on-our-site-may-contain-a-chemical-know-to-the-state-of-California-to-cause-cancer-or-birth-defects-or-other-reproductive-harm.-For-more-information-about-Proposition-65-please-Click-Here.
25ft 1/4 x 1/2 Line Set for DIY 18K Indoor - R454B
FeatureSpec
SKUDIY25-1412-O
Weight (in lbs)12.1
Brand/ManufacturerMRCOOL
UPC605468070710
RefrigerantR454B
Liquid Valve Size 1/4
Suction Valve Size 1/2
Safety InformationPROPOSITION-65-WARNING This-product-and-many-products-on-our-site-may-contain-a-chemical-know-to-the-state-of-California-to-cause-cancer-or-birth-defects-or-other-reproductive-harm.-For-more-information-about-Proposition-65-please-Click-Here.
16ft 1/4 x 1/2 Line Set for DIY 18K Indoor - R454B
FeatureSpec
SKUDIY16-1412-O
Weight (in lbs)8.8
Brand/ManufacturerMRCOOL
UPC605468375099
RefrigerantR454B
Liquid Valve Size 1/4
Suction Valve Size 1/2
Safety InformationPROPOSITION-65-WARNING This-product-and-many-products-on-our-site-may-contain-a-chemical-know-to-the-state-of-California-to-cause-cancer-or-birth-defects-or-other-reproductive-harm.-For-more-information-about-Proposition-65-please-Click-Here.
35ft 1/4 x 1/2 Lineset for DIY 9K, 12K & 18K Indoor w/ DIY Pro Cable - R454B
FeatureSpec
SKUDIY35-1412C-O
Weight (in lbs)18.3
Brand/ManufacturerMRCOOL
UPC605468447246
RefrigerantR454B
Liquid Valve Size 1/4
Suction Valve Size 1/2
Safety InformationPROPOSITION-65-WARNING This-product-and-many-products-on-our-site-may-contain-a-chemical-know-to-the-state-of-California-to-cause-cancer-or-birth-defects-or-other-reproductive-harm.-For-more-information-about-Proposition-65-please-Click-Here.
50ft 1/4 x 1/2 Lineset for DIY 9K, 12K & 18K Indoor w/ DIY Pro Cable - R454B
FeatureSpec
SKUDIY50-1412C-O
Weight (in lbs)26.7
Brand/ManufacturerMRCOOL
UPC605468409282
RefrigerantR454B
Liquid Valve Size 1/4
Suction Valve Size 1/2
Safety InformationPROPOSITION-65-WARNING This-product-and-many-products-on-our-site-may-contain-a-chemical-know-to-the-state-of-California-to-cause-cancer-or-birth-defects-or-other-reproductive-harm.-For-more-information-about-Proposition-65-please-Click-Here.
25ft 1/4 x 3/8 Line Set for DIY 6K, 9K & 12K Indoor - R454B 
FeatureSpec
SKUDIY25-1438-O
Weight (in lbs)10.4
Brand/ManufacturerMRCOOL
UPC605468000724
RefrigerantR454B
Liquid Valve Size 1/4
Suction Valve Size 3/8
Safety InformationPROPOSITION-65-WARNING This-product-and-many-products-on-our-site-may-contain-a-chemical-know-to-the-state-of-California-to-cause-cancer-or-birth-defects-or-other-reproductive-harm.-For-more-information-about-Proposition-65-please-Click-Here.
50ft 1/4 x 3/8 Line Set for DIY 6K, 9K & 12K Indoor w/ DIY Pro Cable - R454B   
FeatureSpec
SKUDIY50-1438C-O
Weight (in lbs)24
Brand/ManufacturerMRCOOL
UPC605468291115
RefrigerantR454B
Liquid Valve Size 1/4
Suction Valve Size 3/8
Safety InformationPROPOSITION-65-WARNING This-product-and-many-products-on-our-site-may-contain-a-chemical-know-to-the-state-of-California-to-cause-cancer-or-birth-defects-or-other-reproductive-harm.-For-more-information-about-Proposition-65-please-Click-Here.
35ft 1/4 x 3/8 Line Set for DIY 6K, 9K & 12K Indoor w/ DIY Pro Cable - R454B
FeatureSpec
SKUDIY35-1438C-O
Weight (in lbs)17.6
Brand/ManufacturerMRCOOL
UPC605468430279
RefrigerantR454B
Liquid Valve Size 1/4
Suction Valve Size 3/8
Safety InformationPROPOSITION-65-WARNING This-product-and-many-products-on-our-site-may-contain-a-chemical-know-to-the-state-of-California-to-cause-cancer-or-birth-defects-or-other-reproductive-harm.-For-more-information-about-Proposition-65-please-Click-Here.
16ft 1/4 x 3/8 Line Set for DIY 6K, 9K & 12K Indoor - R454B
FeatureSpec
SKUDIY16-1438-O
Weight (in lbs)7.9
Brand/ManufacturerMRCOOL
UPC605468495094
RefrigerantR454B
Liquid Valve Size 1/4
Suction Valve Size 3/8
Safety InformationPROPOSITION-65-WARNING This-product-and-many-products-on-our-site-may-contain-a-chemical-know-to-the-state-of-California-to-cause-cancer-or-birth-defects-or-other-reproductive-harm.-For-more-information-about-Proposition-65-please-Click-Here.
Top reviews
  1. Awesome Product
    Quality
    100%
    Service
    100%
    Price
    100%
    Thank you so much for such a quality product at a great price. The local heating/cooling company was going to charge me 10k for a unit for a 30 by 30 garage!

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Why Choose MRCOOL?

MRCOOL mini split systems combine innovative design with advanced manufacturing to deliver efficient, reliable comfort wherever you need it. Built with cutting-edge technology, these systems ensure optimal performance and flexibility for any space.

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