Long-Lasting｜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Whether you’re replacing an outdated HVAC system, upgrading your home’s efficiency, or adding climate control to multiple rooms, the MRCOOL® DIY® 5th Gen Multi-Zone system delivers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.
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