Retro｜MRCOOL® DIY® 5th Gen 2-Zone 18,000 BTU Ductless Mini Split Air Conditioner & Heat Pump with Pre-Charged (25ft+25ft) Line Sets (6K+12K) Air Handlers, (230V)-DIYM227HPW00D06

Product Description 
MRCOOL® DIY® 5th Gen 27,000 BTU 2-Zone Mini Split System – 23 SEER2 – 6K + 12K Air Handlers – DIYM227HPW00D06
Product Overview
The MRCOOL® DIYM227HPW00D06 is a high-efficiency 27,000 BTU 2-zone ductless mini split system designed for homeowners who want powerful heating and cooling performance without paying expensive professional installation costs. Built around the advanced MRCOOL® DIY® 5th Generation Multi-Zone platform, this system combines smart technology, energy savings, true DIY installation, and independent room comfort into one complete HVAC solution.
This bundle includes the MRCOOL® DIY-MULTI4-27HP230D-O outdoor condenser paired with one 6,000 BTU wall-mounted air handler and one 12,000 BTU wall-mounted air handler, making it ideal for heating and cooling two different room sizes independently. The 6K air handler is perfect for smaller spaces like bedrooms, nurseries, offices, server rooms, and guest rooms up to 200 square feet, while the 12K air handler is designed for larger areas up to 550 square feet such as garages, workshops, additions, apartments, living rooms, and open-concept spaces.
Unlike traditional mini split systems that require certified HVAC technicians, refrigerant charging, vacuum pumps, and specialty tools, the MRCOOL® DIY® system is engineered specifically for homeowners. The included 25-foot QuickConnect® pre-charged line sets come factory-filled with refrigerant and are ready to install right out of the box — eliminating the need for expensive HVAC labor and simplifying installation dramatically.
Powered by advanced inverter-driven compressor technology and environmentally friendly R-454B refrigerant, this system delivers impressive efficiency ratings up to 23 SEER2 while helping reduce monthly heating and cooling costs. The variable-speed compressor automatically adjusts output based on demand, creating more stable indoor temperatures, quieter operation, and greater long-term efficiency.
The MRCOOL® DIY® 5th Generation system also includes smart home compatibility through the MRCOOL® SmartHVAC app, Amazon Alexa, and Google Assistant, giving you complete control of your comfort directly from your smartphone or voice assistant.
Whether you’re upgrading outdated window units, replacing an aging HVAC system, or adding heating and cooling to spaces without ductwork, the MRCOOL® DIY® 5th Gen Multi-Zone system delivers professional-level comfort with true do-it-yourself simplicity.
 
What’s Included In This Bundle
Outdoor Condenser

MRCOOL® DIY-MULTI4-27HP230D-O
27,000 BTU 5th Gen Multi-Zone Condenser
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-12-HP-WMAH-230D25-O

12,000 BTU Wall Mounted Air Handler
Covers up to 550 sq. ft.

Included Installation Components

(2) 25 ft QuickConnect® Pre-Charged Line Sets
DIYPRO® communication cable
Wireless remote controls
Installation hardware and mounting accessories

Smartphone not included
 
Why Homeowners Choose MRCOOL® DIY®
True DIY Installation
No vacuum pump, refrigerant gauges, or refrigerant handling required. Install it yourself and save thousands on professional HVAC labor.
Independent Room Temperature Control
Each room gets its own air handler and separate temperature control for personalized comfort and improved efficiency.
High-Efficiency Heating & Cooling
With up to 23 SEER2 efficiency and inverter technology, this system helps lower monthly utility bills while maintaining stable indoor comfort.
Reliable Cold Weather Heating
Designed for low ambient heating performance with reliable operation down to -13°F outdoor temperatures and strong heating output around 5°F.
Smart Home Compatible
Built-in WiFi compatibility works with:

MRCOOL® SmartHVAC App
Amazon Alexa
Google Assistant

Eco-Friendly R-454B Refrigerant
Uses next-generation refrigerant with lower global warming potential and compliance with newer HVAC environmental standards.
Quiet Indoor Comfort
Wall-mounted air handlers operate quietly, making them ideal for bedrooms, offices, and living spaces.
 
System Specifications
System Overview

Model Number: DIYM227HPW00D06
System Type: Ductless Mini Split Heat Pump
Zones: 2
Total Cooling Capacity: 18,000 BTU
Zone Configuration: 6K + 12K
Total Coverage Area: Up to 750 sq. ft.
Refrigerant Type: R-454B
Installation Type: DIY QuickConnect®
Included Line Sets: (2) 25 ft QuickConnect® Line Sets
Voltage: 208/230V Single Phase

 
Outdoor Condenser Specifications
MRCOOL® DIY-MULTI4-27HP230D-O

Cooling Capacity: 26,000 BTU
Heating Capacity: 26,000 BTU
Cooling Efficiency: 23 SEER2
EER2: 12.0
Heating Efficiency: 9.5 HSPF2-4
HSPF2-5: 7.0
Outdoor Sound Level: 61 dB(A)
Cooling Operating Range: -13°F to 122°F
Heating Operating Range: -13°F to 75°F
Minimum Circuit Ampacity: 23A
Maximum Breaker Size: 25A
Dimensions: 37.24” W x 16.14” D x 31.89” H
Weight: 140.2 lbs

Certifications

ENERGY STAR® Certified
AHRI Certified
UL Listed
ETL Listed

 
Indoor Air Handler Specifications
MRCOOL® DIY-06-HP-WMAH-230D25-O

Cooling Capacity: 6,000 BTU
Heating Capacity: 6,000 BTU
Coverage Area: 100–200 sq. ft.
Mount Type: Wall Mounted
Liquid Line Size: 1/4”
Suction Line Size: 3/8”
Dimensions: 31.57” W x 7.44” D x 11.69” H
Weight: 24.47 lbs

Operating Modes

Auto Mode
Cooling Mode
Heating Mode
Fan-Only Mode
Dry/Dehumidification Mode
Sleep Mode

 
MRCOOL® DIY-12-HP-WMAH-230D25-O

Cooling Capacity: 12,000 BTU
Heating Capacity: 12,000 BTU
Coverage Area: 351–550 sq. ft.
Mount Type: Wall Mounted
Liquid Line Size: 1/4”
Suction Line Size: 3/8”
Dimensions: 31.57” W x 7.44” D x 11.69” H
Weight: 24.47 lbs

Operating Modes

Auto Mode
Cooling Mode
Heating Mode
Fan-Only Mode
Dry/Dehumidification Mode
Sleep Mode

 
Frequently Asked Questions on the MRCOOL® DIY® 5th Gen 27,000 BTU 2-Zone Mini Split System – 23 SEER2 – 6K + 12K Air Handlers – DIYM227HPW00D06
What’s new with the MRCOOL® DIY® 5th Generation systems?
The 5th Gen MRCOOL® DIY® systems feature:

Eco-friendly R-454B refrigerant
Higher SEER2 efficiency ratings
Improved cold weather heating performance
Enhanced inverter compressor technology
Better long-term reliability and durability

 
Can I install this system myself?
Yes. MRCOOL® DIY® systems are designed specifically for homeowners using QuickConnect® pre-charged line sets that eliminate the need for vacuum pumps or refrigerant charging.
A licensed electrician is recommended for final electrical connections and code compliance.
 
Does this system provide both heating and cooling?
Yes. This is a heat pump system that provides both air conditioning and heating for year-round comfort.
 
Does it work in cold weather?
Yes. The system is designed for low ambient heating and can continue heating in outdoor temperatures down to -13°F.
 
Is WiFi included?
Yes. The system supports smart control through the MRCOOL® SmartHVAC app and works with Amazon Alexa and Google Assistant. As long as you have WiFi
 
What rooms work best with this system?
Perfect applications include:

Bedrooms
Home offices
Garages
Workshops
Tiny homes
Apartments
Barndominiums
Older homes without ductwork
Additions and bonus rooms

 
Warranty Coverage
The MRCOOL® DIY® 5th Generation system includes:

7-Year Compressor Replacement Warranty
5-Year Parts Warranty

Eligible for the care kit program 

 
Why Buy From MRCOOL Direct?
MRCOOL Direct is one of America’s most trusted authorized MRCOOL dealers, helping homeowners save money with genuine factory-direct HVAC systems and real customer support.
When You Buy From Us, You Get:

Authorized MRCOOL dealer protection
Genuine factory-fresh equipment
Full manufacturer warranty support
Fast nationwide shipping
Expert product assistance
DIY installation support
Help with sizing and accessories
No unauthorized third-party marketplace sellers
Family-owned customer service that actually cares

We proudly help homeowners across the USA find the right heating and cooling solutions for their homes and businesses.
Need Help Choosing The Right System?
Call our HVAC specialists anytime:
615-553-8118
Friendly support from real people who love talking HVAC.
BUY DIRECT FROM MRCOOL DIRECT
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