MRCOOL® 55K 5th Gen 6-Zone DIY® Mini Split System with (9k + 36K) Air Handlers & (16ft + 16ft) Pre-Charged R-454B Line Sets, (230V)-DIYM255HPW01D00

Product Description 

MRCOOL® DIY® 5th Gen 55,000 BTU 6-Zone Mini Split System – 22 SEER2 – R-454B – DIYM255HPW01D00

Product Overview

 The MRCOOL® DIYM255HPW01D00 is a high-performance 55,000 BTU 6-zone ductless mini split system designed for homeowners who want powerful whole-home heating and cooling without the high cost of professional HVAC installation. Built around the advanced MRCOOL® DIY® 5th Generation Multi-Zone platform, this system delivers energy-efficient comfort, smart home integration, and true room-by-room temperature control using environmentally friendly R-454B refrigerant.

This complete multi-zone bundle combines the MRCOOL® DIY-MULTI6-55HP230D-O outdoor condenser with one 9,000 BTU wall-mounted air handler and one 36,000 BTU wall-mounted air handler, making it ideal for homes with mixed room sizes, large open areas, additions, garages, workshops, upstairs living spaces, or entire home applications.

Unlike traditional HVAC systems that require costly professional installation, this MRCOOL® DIY® mini split system is specifically engineered for homeowners. The included DIY® QuickConnect® pre-charged line sets come factory sealed with refrigerant already inside, eliminating the need for vacuum pumps, gauges, or special HVAC tools. Installation is faster, cleaner, and more affordable compared to conventional systems.

The included DIYPRO® communication cable adds additional durability and protection from weather exposure, UV damage, and rodents while removing the need for metal conduit in many installations.

With built-in WiFi and the MRCOOL® Smart HVAC Controller®, you can easily control your comfort from anywhere using your smartphone. The system is also compatible with Amazon Alexa and Google Assistant for hands-free voice control.

Designed for long-term performance and energy savings, this system includes advanced features like inverter-driven compressor technology, Follow Me® temperature sensing, Gold Fin® anti-corrosion protection, low ambient cooling capability, sleep mode, auto restart, and intelligent diagnostics.

Whether you’re replacing an outdated HVAC system, upgrading your home’s efficiency, or adding climate control to multiple rooms, the MRCOOL® DIY® 5th Gen Multi-Zone system delivers professional-level comfort with true DIY simplicity.

What’s Included In This Bundle

Outdoor Condenser

• MRCOOL® DIY-MULTI6-55HP230D-O

• 55,000 BTU 6-Zone DIY® 5th Gen Multi-Zone Condenser

• 208/230V

Indoor Air Handlers

• MRCOOL® DIY-09-HP-WMAH-230D25-O

• 9,000 BTU Wall Mounted Air Handler

• Covers up to 400 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

• MRCOOL® DIY16-1438-O

• 16 ft QuickConnect® Line Set (1/4” x 3/8”)

• MRCOOL® DIY16-3858-O

• 16 ft QuickConnect® Line Set (3/8” x 5/8”)

• DIYPRO® communication cable

• Wireless remote controls

• Mounting hardware

• Installation accessories

Smartphone not included

Key Features & Benefits

True DIY® Installation

Install it yourself and save thousands on HVAC labor costs. No vacuum pump, gauges, or refrigerant handling required.

Multi-Zone Comfort Control

Control temperatures independently in different rooms for better comfort and energy efficiency.

Smart Home Compatible

Built-in WiFi works with:

• MRCOOL® Smart HVAC App

• Amazon Alexa

• Google Assistant

High-Efficiency Inverter Technology

Variable-speed inverter compressor adjusts output automatically for lower energy usage and quieter operation.

Gold Fin® Protection

Special anti-corrosion coating helps protect the system in humid, coastal, or harsh environments.

Environmentally Friendly Refrigerant

Uses next-generation R-454B refrigerant with lower global warming potential compared to older refrigerants.

Quiet Operation

Indoor units operate quietly, making them ideal for bedrooms, living rooms, offices, and additions.

Low Ambient Performance

Designed to maintain heating and cooling performance in extreme outdoor temperatures.

System Specifications

• Model Number: DIYM255HPW01D00

• Condenser Model: DIY-MULTI6-55HP230D-O

• Total System Capacity: 55,000 BTU

• Supported Zones: Up to 6 Zones

• Cooling Efficiency: 22 SEER2

• Heating Efficiency: 10.6 HSPF2-4

• Refrigerant Type: R-454B

• Voltage: 208/230V Single Phase

• Minimum Circuit Ampacity (MCA): 43A

• Maximum Breaker Size: 45A

• Inverter Compressor: Yes

• ENERGY STAR® Certified: Yes

• AHRI Certified: Yes

• WiFi Compatibility: Built-In

Perfect For

• Whole-home heating & cooling

• Multi-room applications

• Garages & workshops

• Home additions

• Upstairs bonus rooms

• Older homes without ductwork

• Basement finishing projects

• Offices & studios

Frequently Asked Questions for the MRCOOL® DIY® 5th Gen 55,000 BTU 6-Zone Mini Split System – 22 SEER2 – R-454B – DIYM255HPW01D00

Can I really install this system myself?

Yes. MRCOOL® DIY® systems are specifically engineered for homeowner installation using pre-charged QuickConnect® line sets.

Can I expand this system later?

Yes. The condenser supports up to 6 indoor zones total, allowing future expansion if needed.

Does this system require ductwork?

No. This is a ductless mini split system, so no ductwork is required.

Does it work with smart home devices?

Yes. The system works with Amazon Alexa, Google Assistant, and the MRCOOL® Smart HVAC Controller® app.

What warranty comes with this system?

• 5-Year Parts Warranty

• 7-Year Compressor Warranty

• Eligible for the MRCOOL® Care kit program

Why Buy From MRCOOL Direct?

When you purchase from MRCOOL Direct, you’re buying from an authorized MRCOOL dealer committed to real customer support and genuine factory-direct products.

What You Get:

• Genuine factory-fresh MRCOOL equipment

• Full manufacturer warranty protection

• Fast U.S. shipping on in-stock products

• Financing options available

• Real product support before and after the sale

• Help with sizing, accessories, and DIY installation questions

• No third-party marketplace risks or unauthorized sellers

We’re family owned, customer focused, and proud to help homeowners across the USA save money with high-efficiency HVAC solutions.

Need Help?

Call us anytime:

615-553-8118

Friendly HVAC support is always just a phone call away.

BUY DIRECT FROM MRCOOL DIRECT. USA #1 Most Trusted Dealer.