MRCOOL® 55K 5th Gen 6-Zone DIY® Mini Split System with (6K + 36K) Air Handlers & (25ft + 25ft) Pre-Charged R-454B Line Sets, (230V)- DIYM255HPW00D07

Product Description

MRCOOL® DIY® 5th Gen 55,000 BTU 2-Zone Mini Split System – 22 SEER2 – 6K + 36K Air Handlers – DIYM255HPW00D07

Product Overview

The MRCOOL® DIYM255HPW00D07 is a powerful 55,000 BTU 2-zone ductless mini split heat pump system designed for homeowners who need exceptional heating and cooling capacity, independent room control, and true DIY installation. Built around the flagship MRCOOL® DIY® 5th Generation Multi-Zone platform, this system combines industry-leading efficiency, smart home integration, and professional-grade comfort without the cost of traditional HVAC installation.

This bundle includes the MRCOOL® DIY-MULTI6-55HP230D-O 55K outdoor condenser paired with one 6,000 BTU wall-mounted air handler and one 36,000 BTU wall-mounted air handler. This unique configuration is perfect for properties that need precise climate control in both a smaller room and a large open-concept area. The 6K air handler is ideal for bedrooms, offices, nurseries, server rooms, guest rooms, or other compact spaces up to 200 square feet, while the 36K air handler is engineered for large living rooms, barndominiums, workshops, garages, basements, warehouses, great rooms, open floor plans, and commercial-style spaces up to 1,550 square feet.

Unlike conventional multi-zone mini split systems that require licensed HVAC contractors, refrigerant charging, vacuum pumps, and specialized installation equipment, the MRCOOL® DIY® system is specifically designed for homeowner installation. The included DIY® QuickConnect® pre-charged line sets arrive factory-sealed with environmentally friendly R-454B refrigerant already inside. No vacuuming. No gauges. No refrigerant handling. No costly HVAC labor.

With up to 22 SEER2 efficiency and advanced DC inverter compressor technology, this system automatically adjusts heating and cooling output based on demand, helping reduce utility costs while maintaining consistent comfort year-round. The inverter-driven design provides quieter operation, improved humidity control, and more precise temperature management compared to traditional HVAC systems.

Smart comfort comes standard. Control your system using the MRCOOL® SmartHVAC app, Amazon Alexa, Google Assistant, or the included wireless remotes. Create schedules, monitor energy usage, adjust temperatures remotely, and enjoy complete comfort control from virtually anywhere.

The 55K condenser supports up to 6 indoor zones total, and this bundle currently utilizes only 2 zones. That means you still have room to add up to four additional compatible indoor air handlers in the future as your comfort needs expand.

Whether you’re heating and cooling a barndominium, workshop, large garage, detached building, open-concept home, multi-room property, or combination living space, the MRCOOL® DIYM255HPW00D07 delivers outstanding performance, energy efficiency, and installation flexibility.

What’s Included In This Bundle

Outdoor Condenser

• MRCOOL® DIY-MULTI6-55HP230D-O
• 55,000 BTU DIY® 5th Gen Multi-Zone Condenser
• Supports up to 6 indoor zones
• 208/230V

Indoor Air Handlers

MRCOOL® DIY-06-HP-WMAH-230D25-O

• 6,000 BTU Wall Mounted Air Handler
• Covers up to 200 sq. ft.

MRCOOL® DIY-36-HP-WMAH-230D25-O

• 36,000 BTU Wall Mounted Air Handler
• Covers up to 1,550 sq. ft.

Included Installation Components

• (1) 25 ft DIY25-1438-O QuickConnect® Line Set
• (1) 25 ft DIY25-3858-O QuickConnect® Line Set
• DIYPRO® communication cable
• Wireless remotes
• SmartHVAC WiFi control
• Mounting hardware
• Installation manuals

Smartphone not included

Ideal Applications

The DIYM255HPW00D07 is perfect for:

• Barndominiums
• Large garages
• Workshops
• Pole barns
• Open-concept homes
• Great rooms
• Warehouses
• Basements
• Bonus rooms
• Home offices
• Detached buildings
• Apartment buildings
• Multi-room properties
• Airbnb properties
• Commercial office spaces

Estimated coverage:

• 6K Zone: Up to 200 sq. ft.
• 36K Zone: Up to 1,550 sq. ft.
• Total Estimated Coverage: Up to 1,750 sq. ft.

Actual coverage may vary depending on insulation, ceiling height, climate zone, windows, sun exposure, and room layout.

Why Homeowners Choose MRCOOL® DIY®

True DIY® Installation

No vacuum pumps, refrigerant gauges, recovery equipment, or HVAC licensing required for installation of the refrigerant lines.

Save Thousands On HVAC Labor

Avoid costly professional installation fees thanks to factory-sealed QuickConnect® technology.

Independent Room Temperature Control

Each indoor air handler operates independently, allowing customized comfort in every space.

Expandable 6-Zone Platform

The condenser supports up to 6 indoor units total, giving you room for future expansion.

High-Efficiency Inverter Technology

The DC inverter compressor continuously adjusts output for maximum efficiency and comfort.

Built For Year-Round Comfort

Provides:

• Cooling
• Heating
• Dehumidification
• Fan-only operation
• Auto mode
• Sleep mode
• Quiet mode

Smart Home Compatible

Works with:

• MRCOOL® SmartHVAC App
• Amazon Alexa
• Google Assistant
• Wireless remotes

Eco-Friendly R-454B Refrigerant

Next-generation refrigerant with lower environmental impact and improved efficiency.

Gold Fin® Protection

Corrosion-resistant coating helps protect coils and improve long-term durability in humid and coastal environments.

Follow Me® Technology

Remote temperature sensing helps deliver more accurate comfort where you are in the room.

System Specifications

System Overview

• Model Number: DIYM255HPW00D07
• System Type: Ductless Mini Split Heat Pump
• Zones Installed: 2
• Maximum Zones Supported: 6
• Outdoor Capacity: 55,000 BTU
• Indoor Configuration: 6K + 36K
• Estimated Coverage: Up to 1,750 sq. ft.
• Refrigerant: R-454B
• Voltage: 208/230V
• Phase: 1
• Cycle: 60Hz

Outdoor Condenser Specifications

MRCOOL® DIY-MULTI6-55HP230D-O

• Cooling Capacity: 55,000 BTU
• Heating Capacity: 55,000 BTU
• SEER2: 22
• HSPF2-4: 10.6
• Tonnage: 4.5 Ton
• Compressor Type: DC Inverter
• Refrigerant Type: R-454B
• Zone Capacity: 6
• Minimum Circuit Ampacity: 43A
• Maximum Breaker Size: 45A
• ENERGY STAR® Certified
• AHRI Certified
• Gold Fin® Condenser Protection

Physical Dimensions

• Width: 37.48”
• Height: 52.48”
• Depth: 16.34”
• Weight: 245.81 lbs

Indoor Air Handler Specifications

MRCOOL® DIY-06-HP-WMAH-230D25-O

• Cooling Capacity: 6,000 BTU
• Heating Capacity: 6,000 BTU
• Coverage Area: Up to 200 sq. ft.
• Mount Type: Wall Mounted
• Voltage: 208/230V
• Filter: Reusable
• WiFi Compatible: Yes
• App Compatible: Yes
• Remote Included: Yes

Operating Modes

• Cool
• Heat
• Auto
• Dry
• Fan
• Sleep
• Quiet Mode

MRCOOL® DIY-36-HP-WMAH-230D25-O

• Cooling Capacity: 36,000 BTU
• Heating Capacity: 36,000 BTU
• Coverage Area: Up to 1,550 sq. ft.
• Mount Type: Wall Mounted
• High Output Airflow
• Multi-Speed Fan
• Quiet Operation
• WiFi Compatible
• App Compatible
• Remote Included

Operating Modes

• Cool
• Heat
• Auto
• Dry
• Fan
• Sleep
• Quiet Mode

Frequently Asked Questions about the MRCOOL® DIY® 5th Gen 55,000 BTU 2-Zone Mini Split System – 22 SEER2 – 6K + 36K Air Handlers – DIYM255HPW00D07

Can I add more indoor units later?

Yes. This condenser supports up to 6 indoor zones total. Since this bundle uses only 2 zones, up to 4 additional compatible air handlers can be added later.

Is this system truly DIY?

Yes. MRCOOL® DIY® QuickConnect® technology eliminates refrigerant handling, vacuum pumps, gauges, and most specialized HVAC tools.

A licensed electrician should complete the final electrical connections according to local code.

Is R-454B better than R-410A?

R-454B offers significantly lower global warming potential while maintaining excellent efficiency and performance.

Can I control the system remotely?

Absolutely. Use the MRCOOL® SmartHVAC app, Amazon Alexa, Google Assistant, or included wireless remotes.

Is this system good for large spaces?

Yes. The included 36K air handler is specifically designed for large open-concept spaces, garages, workshops, barndominiums, and great rooms up to approximately 1,550 square feet.

Warranty Coverage

This MRCOOL® DIY® 5th Generation system includes:

• 7-Year Compressor Warranty
• 5-Year Parts Warranty

Eligible for the MRCOOL® Care kit program.

Why Buy From MRCOOL Direct?

MRCOOL Direct is one of America’s most trusted authorized MRCOOL dealers, providing genuine factory-fresh equipment backed by real customer support.

When You Buy From MRCOOL Direct You Receive:

✅ Authorized MRCOOL dealer protection
✅ Genuine factory-fresh equipment
✅ Fast nationwide shipping
✅ Financing options available
✅ Expert sizing assistance
✅ Line set and accessory guidance
✅ DIY installation support
✅ Friendly family-owned customer service
✅ No third-party marketplace confusion

Need help sizing your home, garage, workshop, or barndominium?

Call MRCOOL Direct:

615-553-8118

Friendly HVAC support from real people who love helping customers.

BUY DIRECT AND SAVE! MRCOOL DIRECT